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P.G.A.H. VOIGT: A Great Audio Inventor

The answer would have been known by Voigt from measurements on the MI pickup. If not now available then measuring hysteresis distortion from MI modern pickups would give the answer. Whether any measureable distortion would affect the sound and to what extent is another matter.

I have now done an extended patent search on Voigt from 1920-24.

The following may be of interest, and may explain why he did not patent his MC pickup design.

Abstract of GB 439800 (A)


http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_gb&FT=D&date=19351216&CC=GB&NR=439800A&KC=A

[the diagram for this patent pickup can only be seen by following the link: the text follows]



439,800. Sound reproducing and recording devices. SYKES, A. F., The Dell, Sandpit Lane, St. Albans, Hertfordshire. March 15, 1934, Nos. 8195/34, 11832/34, 36595/34, 2884/35, 5551/35, 6593/35, and 6594/35. [Class 40 (iv)] In a pick-up device, applicable also for recording and as a vibration motor, a flexible armature, or armature or coil carrier, is held in an extended grip of rubber or other material constituting a damping channel which progressively damps out transverse vibration along the gripped portion. A stylus may be connected to the free portion of the armature close to the magnet pole. The armature may be centrally operated with both ends gripped in damping channels. The drawings were filed with the Provisional Specifications. As shown in Fig. I (8195/34), the magnetic system comprises a bar magnet 4 with slotted polepieces 5, 6, and is braced by a split-strut 23 and screw 24. The polepiece 6 is pivotally connected at 16 to a bar 15 on the stud 3 freely rotatable in the housing 1. The polepiece 5 is extended to carry the coil 10 and is provided with a bent wire 21 engaging a stop 22 to limit the movement of the pick-up in the housing 1. A thin steel armature 7 carrying the stylus holder 8 is held between rubber strips 12 secured to the polepiece 6 by a copper clamping plate 13, the clamping pressure being adjusted by screws 14. The rubber strips may be replaced by a rubber tube, Fig. IX (8195/34), (not shown). In other modifications, Figs. V-VIII and XXIII (8195/34) (not shown), the device is adapted for use with cylindrical records, with a gramophone tone-arm, with the Edison Diamond Disc phonograph and with a moving coil instrument. Shaping and control circuits are shown in Fig. XIV (8195/34) comprising a resistance 63 across the pick-up, a potentiometer 65 for volume control and a condenser 64 which may be connected when desired at intermediate positions along the resistance. As shown in Fig. III (11832/34), the stylus lever 68 of an Edison Diamond B reproducer with floating weight is connected to a copper cross-head on the armature 7 by a knotted loop of thread 73. In a modification, Fig. IV (11832/34), the armature 7 is set in a rubber tube 47 or a folded sheet gripped in a sheetiron holder 75 formed with tabs 76 for securing to the polepiece. A spring may be used in addition to the floating weight. To prevent noises due to deformities of celluloid recordcylinders a series condenser may be inserted in the pick-up leads in conjunction with the shunt resistance of the volume control so as to reduce the bass response, or a small rubber pad may be inserted between the armature and the bobbin. As shown in Fig. III (36595/34), the pickup is fitted in a casing 78 adapted to take the floating weight 67 and stylus lever 68 of an existing machine, and replaces the soundbox in order to convert from mechanical to electrical reproduction. The magnetic system may be supported in the casing on soft washers at top and bottom. For adjustment of the air-gap, a core in the pole 11 is moved by turning the cap 86. The pole 11 may be saw-cut and the pole 6 laminated. The magnet 4 and laminations 6 may be moulded into the casing, leaving a cavity for the coil 10, or the parts may be moulded together as a block to be slipped into the casing. The rubber tube for damping the armature may be cut to a V-shape and the clamping plate may be held more tightly at the fixed end, in order to vary the damping along the length of the armature. As shown in inverted plan in Fig. II (6593/35), the armature 7 is set in front of the poles 6 of a magnet with two windings 10. The clamping plate 13 is screwed down on to a ledge of the moulding 90 in order to compress the rubber 12 uniformly, and the air-gap may be adjusted by paper washers beneath the rubber. As shown in Fig. 1 (6594/35), the armature is set between magnetic poles. The armature 7 carrying the stylus 8 is held by rubber strips 12 or a flattened rubber tube between the polepieces 6 of magnets 4, and the armature vibrates between the pole tips 11 and within the coil 10. In modifications not shown, the pick-up is mounted with a pad of rubber, cork, or other damping material clamped between the magnet and the top of the casing over the whole length of the magnet ; the magnet is wrapped in a rubber sheet and forced into the housing; the stylus lever is connected to the armature by a chainstitch cord with the loops pulled tight, which reduces resonant vibration between these parts, or this connection may be a silken cord gripped by a crosshead soldered to the armature, and the armature may be stiffened by making this crosshead as a web. Specifications 227,391, 263,502, and 303,579, [all in Class 40 (ii)], are referred to.
 
markse
You asked: "Did he claim the same for MC cartridges?"
The answer is to be found in the article you linked...

"...By then I had my moving coil pickup (with its freedom from hysteresis distortion) as well as the loudspeaker..."​
 
Surely though if you use a stepup transformer with an MC you're going to be lumbered with a similar distortion- maybe worse given the larger amount of iron in the core? I wonder what Voigt used?
Mark
 
I don’t know what Voigt used. But I will try to find out. I suspect that he used no stepup at all, the cartridge being of high output.

It is not necessary to use iron as a core material in a MC transformer and more and more high quality ones do not use it,e.g.:

-Fidelity Research used permalloy;
-K&K use amorphus cobalt;
-Arriba use amorphous alloy (claims little hysterisis loss);
-Hashimoto HM-3 uses permalloy (nickel-iron magnetic alloy).
-Sowter uses mumetal (76%nickel)
 
MEMOIRS OF A DIY HI FI NUT - Part XVIII
P.G.A.H. VOIGT: A Great Audio Inventor​

VII​


Donald Aldous knew Voigt well, and gives a fascinating account of the man.10

“He was an eccentric genius- way ahead of his time.”


Aldous says that Voigt’s loudspeakers were exceptional and even in 1984 his corner horn is “quite superb and still used”. He owns 2 early Voigt tractrix horns (now fitted with PM6 units) and says that they are “amazingly good”.


“He was not an easy man to get on with. If he did not like your ideas he would storm out of the room”. Voigt himself remarked: "I have long ago learned to keep my mouth shut if my impression would not please others..." I wonder whether if others did not like his ideas and stormed out of the room he would have been affected. Details of his personality are sparse. Some insights into his personality emerge from a reading of his very long letter to Thomson (Re: Blumlein) dated 12 January 1973. 14 In this letter (20 foolscap closedly typed pages) he gives effusive credit to Alan Blumlein as being a superior engineer to himself. In fact, he calls Blumlein the "genius of the stereo grooves" and fully endorses Thomson's characterization of Blumlein as "engineer extraordinary". These sorts of remarks occur again and again, and Voigt even goes so far as to defend Blumlein from charges of arrogance on the basis of Voigt's limited personal experience. This points to a generosity of spirit on Voigt's behalf, and a lack of arrogance himself. He also demonstrates that he has considerable persistance and dedication and is willing to go what nowadays is referred to as 'the extra mile' to help people. He also seems willing to adopt views on the basis of only one or two personal experiences, withoutout undue scientific caution. An example is his embracement of astrology after one analysis of his birthdate and time of birth yielded information that he and his wife regarded as if the astrologer had studied Voigt for 20 years! He then proceeded to attempt to ascertain Blumlein's birthdate and time of birth, but Blumlein was only able to provide the former.

Voigt first met Lowther at Radio Olympia in 1934. Lowther supplied the tuners, Voigt the speaker to make up the Lowther-Voigt Radiogram. 11 The two worked together until they fell out. Voigt was critical of Lowther after he moved to Canada. He was told (and accepted) that Lowther made Voigt drivers that were not as good as the ones Voigt had made, though he had provided them with his tools and instructions. He also said that he understood that Lowther had designed cabinets, but he knew nothing about them. 14

Aldous says that Voigt was an individual- an exceptional man- and one of the great names.

Voigt put British audio on the map. In 1935-6 the British Sound Recording Association (BSRA) was started. They started audio exhibitions and met in hotels. The Great Russell hotel in Bloomsbury was one. I expect that the acoustics were better there than one finds nowadays at hi fi shows with demos in dinky little rooms.

In Voigt’s opinion, freedom from distortion is more important than a wide frequency range:

“…I regard a distortion- free system with a range of 40-10,000 Hz as a better than one which distorts appreciably, even though its range may be two octaves wider and run from 20-20,000Hz. The target is, of course, full range without any distortion….”7

Voigt might have been surprised that the target is now 15Hz- 80KHz for some. I’m one of them.
______________________________________________________________
 
80Khz!?! Dogs can't even hear that high! And records (cartridges) certainly can't reproduce accurate sound at that frequency, nor were they ever meant to- I think the usual limit is around 18-20Khz. The 20Hz-20KHz "human hearing range" is not really very accurate- young children may be able to hear up to about 20K but most adults can't.
What's your reasoning for such a wide range Eguth?
Mark
 
markse

You wondered what stepup Voigt used with his moving coil pickup. I have not found a direct answer. However, from the quotes below [the one Re: moving iron given out of interest to you] it seems that output in those days was sufficient to dispense with any form of stepup.

Voigt wrote:

“…note the very general tendency to a falling characteristic which modern pickups have when used with the circuits recommended by their makers.” (Wireless World, Feb.1940, p.144)

“…In practice, it must be remembered that these pickups, especially those of the moving iron type, have windings which may be inductive. Consequently if such a pickup Is feeding into a resistive load, such as a volume control, then the inherent inductance of the pickup will act as a series choke and reduce the high frequencies.” (Wireless World, March 1940, p.177)

With regard to the output of pickups, he said:

“Electrostatic pick- ups have never become commercial propositions, probably on account of the inherently low voltage output. With piezo pick- ups, however, the output is so high that valve distortion may easily result” (March 1940, p.178).

From the above I conclude that no stepup was necessary or used with his MC pickup.

Moving on to your comments on bandwith: modern MC cartridges can playback frequencies beyond 60KHz. Although I am not a dog- at least I think I am not- I understand that I can detect frequencies above 50KHz, although there are no notes up there.

Measurements on several Neumann cutter heads prior to cutting a master revealed that the head cuts frequencies up to 50KHz. (see Whest Audio information on their model PS.30R).

While there are no notes up there, extended frequency response way above 20KHz does bring audible benefits to the soundstage, enhance realism and even reproduction of bass notes benefits- as users of high qulity MC cartridges with ancillary equipment capable of exteneded frequency response hear and know. This is one of the reasons why some of us spend good money on expensive MC cartridges. You do not get such performance from CD or from a MI carttridge or bandwith- limited systems. Supertweeters are a good idea (in my opinion)!

Research done by the U.S. Air Force demonstrated that even the over- 65s can detect frequencies above 60KHz.

Re: the contention that humans cannot hear anything above 20KHz research has been done on this topic. (see Oohashi, “High Frequency Sound Above the Audible Range, AES Reprint No.3207), (or Journal of Neurophysiology 2000 83: 35548-3558). We don’t only hear with our ears: we also hear with our brains.

For a learned and thorough discussion of this area with extensive references see Colloms, M. Proceedings of the Institute of Acoustics, Vol 28, Pt.8, 2006 ‘Do We Need Ultrasonic Bandwith for High Fidelity Sound Reproduction?' (LINK on Hi Fi Critic website).

Colloms is sceptical of the benefits, holds that the case for extended bandwith is “not proven” and given this, ends with the surprising recommendation that “for origination and post production, within reason, we should be encouraged to use the widest bandwith possible".
 
markse

Re: your query on what stepup Voigt used for his MC pickup. I have found further information.

He developed an MC pickup circa 1940 in his factory at “The Courts”, Sydenham. This was a new pickup and may be different from any previous one he had been developing while at W.E. Hough Ltd.

The features of the new pickup were:

1) downward tracking force required: 1/2g (usually);
2) low output (no specs given);
3) step up unit ‘incorporating a correction circuit for “constant amplitude in the bass” '[no further details given];
4) capacitance of the two yards of screened cable to the amplifier is included in the correction circuit;
5) response is smooth and rises 10dB from 8000 to 50 cycles;
6) for use with old records a further reduction of high- notes response is provided by a control on the coupling unit.

Voigt was accepting orders for this pickup in June 1940 although it was still in the experimental stage. The price was to be “in the order of £6”.

Voigt also developed a new ingenious tone arm. This included a pivot designed to minimise wow on warped records. This pickup, or its predecessor, was apparently developed in the mid 1930s. Cecil Watts says:-

"...about this time (1935-6) P.G.A.H. Voigt brought me a pickup fitted with a diamond stylus. It was his first moving coil model and he had fabricated the entire head and arm out of wood..." Cecil Watts, in Audio Biographies (G.A. Briggs), p.319
 
MEMOIRS OF A DIY HI FI NUT - Part XVIII
P.G.A.H. VOIGT: A Great Audio Inventor​

VIII
Voigt Patents Ltd.​

Edison Bell folded after the great crash of 1933. Voigt then set up his own firm, Voigt Patents Ltd. He got in touch with the Official Receiver and purchased the parts and specialised tooling he had designed.

The new business premises became a small factory inside a residential house named “The Courts”, Silverdale, in Sydenham.



DSCN0719 by pulitout, on Flickr



“The Courts” is the house with the large bay window.3,5. I understand that the name was chosen because of the close proximity of tennis courts.

Here he continued work on cinema horns and designed and produced what became his famous corner horn. It sold for £32.5.0. Those were the days!

It was a very small operation. He used to deliver the corner horns after loading them into his tourer-a Wolseley 1 Hornet and trailer. Production had to be given up because he did not have the staff to carry on.10 His head carpenter was advised to retire and did so, apparently unreplaceable. Voigt said his corner horn "was extremely expensive, so sales were few".15 Voigt supported D.I.Y. He even supplied blueprints (at first free of charge then at nominal cost) of a simplified home constructor’s corner horn.13 He developed a new MC pickup and designed a tonearm.

John Gilbert reports that a bomb displaced the roof on Voigt’s factory during the war. Water came in. When the war was over the council, then the Metropolitan Borough of Lewisham, was prejudiced against him because of his German ancestry. Shameful. And inexcusable. They must have known that he served in a British government department during the war. They refused to repair his roof. Voigt was “cheesed off”.


He got very fed up with England. He had a spinal condition but the doctors could find nothing wrong. Although he tried everything that doctors in England and Canada suggested, nothing improved his condition. Much later, he consulted an osteopath in Canada over the phone. The practitioner was a 1st world war ex soldier, blinded. He immediately diagnosed the approximate location of the trouble, and said it was a vertebrae. Voigt subsequently had this confirmed by xray. Within six months Voigt was walking for pleasure again.
_______________________________________________________________
 
MEMOIRS OF A DIY HI FI NUT - Part XVIII
P.G.A.H. VOIGT: A Great Audio Inventor​

IX
CANADA​


In April 1950 Voigt and his wife sailed for Canada leaving “The Courts” factory on a skeleton basis. He arrived in Canada but could not get a job. Eventually he got one on the Canadian railway. This was followed by various employments including teaching electronics at the Ryerson Institute in Toronto and work in the lab of a tape recording machine manufacturer. He finally ended up employed by the federal Canadian government in the radio anti- interference section.7

The photograph of Paul and Ida Voigt (below) was taken in Canada in 1953 a few years after they arrived.

Ida Voigt was a fully qualified electrical engineer. She was said to be either the first or one of the first women to have qualified and awarded a degree in engineering. Further details will be provided in due course.

She was of Scots descent and proud of it. She moved to England as a young girl with her family and spoke with an educated English accent.

It would be interesting to learn how she and Paul met and about any involvement in Paul’s engineering.


DSCN0865 by pulitout, on Flickr

BARBARA VOIGT- interviewed by Eric Stubbes June 2012 (edited and amended).
I am most grateful to her for taking the time and trouble to contribute so much to the memory of Paul Voigt. I have her permission to publish this interview. Personal information about Paul Voigt is in short supply- especially in connexion with his life in Canada- so it is very welcome to have a contribution from Barbara Ann Voigt.

Q.1. I first met Paul Voigt sometime between 1979 and 1981 when we were visiting Brighton for a weekend. (At that time we were living north of Toronto). We visited with both he and Ida, and I remember meeting with them at the camp site where we were staying. There was some sort of BBQ going on that evening and there was music. The only thing I clearly remember is that Paul danced with me!!!!! He was wearing grey flannels and a sports jacket with shirt and tie – a typical English gentleman, and dress wise, didn’t fit in with the camping crowd who were dressed casually in shorts or jeans with T shirts or casual shirts.

Q.2. We met him again on subsequent visits to Brighton at weekends and enjoyed tea with them at their house on Huff Road. I don’t know what his interests were or how he spent his days.

Q.3. No idea, as far as I know, he kept very much to himself and didn’t socialise.

Q.4. No idea of his hobbies. He didn’t do any gardening that I know of, certainly no flowers or vegetables, he didn’t use weed killer on the grass as he thought it was bad for the environment, thus the use of nail scissors. He did absolutely no household chores – that – in his eyes – was women’s’ work!
I do know that he drove Ida to distraction sometimes, when he spent many hours in the summer months digging up weeds in the lawn with a pair of nail scissors when there were 101 other things he needed to be attending to!! He was a very conservative “British” gentleman, and wouldn’t allow Ida to drive… rather inconvenient for her, as Huff Road is some 2 miles from Brighton town centre and she had no way of getting there other than Paul driving her!! Frustrating for her at times.

Q.7. He didn’t have a TV ….. but he probably had a radio – can offer no further help on this one.

Q.8. He didn’t travel at all (that I know of) – either overseas or in Canada, apart from visiting us once at Christmas when we lived north of Toronto back in 1979. On thinking it over, he did honeymoon in Budapest and that was combined with some sort of business. I can’t elaborate any further on that one
…recalling conversations etc.: that happened 17 and more years ago is not easy. Not being a member of the Voigt family (except by marriage) I didn't know the backgrounds and history of Paul and Ida. I do know that they were very uncommunicative and didn't keep up with any of the family back home after they came to Canada. They never returned to the UK, not even for Paul's mother's funeral. They were private isolated people who liked to keep themselves to themselves.

Q.8. Paul and Ida certainly didn't honeymoon in 1979, by then they were 78 and 79 years old respectively. Maybe I wasn't very clear in my answer on this one, 1979 is the year that I emigrated from the UK together with my husband and 2 sons. At some time - and I've no idea when - Ida mentioned to me that the only place she had been to was Budapest on her honeymoon ..... as I have no idea the date she was married, I do not know the year of the honeymoon.

Q.10. When we moved to Huff Road in 1987, there was a part finished Corner Horn in the basement. I presume that Paul built it, but have no photos or serial numbers of it. When we moved from Huff Road in 1995 my husband only had weeks to live ….. I really have no idea what happened to it … sorry ….

Q.11. The Corner Horn that he had was unfinished, so therefore unused. He had many gramophone records which I believe were his original recordings, but I’m too hazy on this one and am unable to elaborate any further.

Q.11. the Corner Horn that we had in Huff Road was situated in the basement. The outside was made of light coloured unfinished wood, and stood about 4' high, extending from the corner along the wall for about 20 in either direction. I don't know what - if any- workings were inside it. I only know that my husband intended to get it up and running at some time. Ida didn't specifically say anything that I can remember about it..... I think she probably hoped that we would get it operational some day - but that is only my opinion. At the time of my move from Huff Road in 1995, my husband was so ill he was unable to help in any way that I had to undertake the whole operation on my own. I really have no idea what became of the Corner Horn, at that time I had more important things to worry about..... because of the situation at that time, quite a few things went "missing" .....

Q.12. No idea on temperature or weather. No heating in the house, and none that I know of in the workshop.

Q.14. Paul was very absent minded and in my opinion, not at all considerate particularly of Ida.

Q.15. Did he do any walking for pleasure (i.e. more than, say sort walks of 100 yards)?] Ans. "No".

Q.19. His workshop was in a state of disrepair when I saw it, I never went inside, quite frankly it was falling down. It must have been several years since he had used it.

Q.23. Very basic old fashioned furniture, not much of it. No running water – had to draw water from a well on the property. No electricity – propane gas. Purely a summer residence. dug outside toilet. All very run down…….

Q.23. Paul and Ida only lived at Huff Road in the summer months due to the lack of amenities. In the winter, they rented a house in town from a friend who lived in Toronto and only used it as a summer place. Actually it was on the same street on which I now live - Prince Edward Street. Several years ago circa 2000 it was demolished along with 2 or 3 others to make way for a small shopping plaza.

Q.26. Ida did not speak with either a Scottish or an Irish accent. She spoke with a very cultured voice as one would hear in the S.E. of the UK. She was certainly of Scottish origin, but moved down south (I think) when she was quite a young girl. I have no idea which area or city in Scotland she originated from. She was proud of her heritage.... not a lot of help I know, but the best I can do.



Below: 50th anniversary: Ida & Paul Voigt- 11.08.78, Canada


DSCF4414 by pulitout, on Flickr

Below: Christmas 1979: Paul & Ida Voigt in Canada with their great nephews Philip and Andrew- sons of Richard & Barbara Voigt


DSCF4415 by pulitout, on Flickr


BELOW SEE RARE PHOTOS of Voigt’s summer home at Huff Road, Brighton, Ontario, Canada.

S0047015 by Round Person, on Flickr


TOP LEFT: ‘Front view of the House. ‘Paul’s workshop is behind the tree on left. The little structure with roof is a cover over the water well’.
TOP RIGHT: ‘Side view of the property looking south’.
BOTTOM LEFT: ‘Side view of the property looking north’.
BOTTOM RIGHT; ‘View from top of garden. You can just see Lake Ontario in the background’.

All the prints are stamped in red ink on the back “Kodachrome print made by Kodak ‘68T’ or ‘APR ART ’ ” except TOP LEFT which is stamped ‘JULY 68T’.
Narrative ‘ ‘ is handwritten on the back of each print by BARBARA VOIGT (Acknowledgement No.11 below). Date of inscription not known.
Copies of these prints were made by me on 27.5.13 using a FUJI X10 digital camera in natural daylight with the camera set on ‘EXR/resolution priority’.
_________________________________________________________________
Paul and Ida lived at Huff Road only during the summer months due to lack of amenities. During the winter they rented a house on Prince Edward Street, Brighton, Ontario. This house was demolished circa 2000 to make way for a small shopping plaza.








SC MSS 170 1 82 4 page 1 by Round Person, on Flickr
see ACKNOWLEGEMENT 13 + FOOTNOTE 17



Voigt tried to develop an export trade but the Canadian venture failed in the mid 1950s. He lived in Canada for the rest of his life.

Peter Walker and Paul Klipsch paid tribute to Voigt in a JAES obituary.12

I think that the world’s hi fi has been better as a result of P.G.A.H. Voigt. I have been proven wrong about things before but I doubt that I shall be proven wrong about this.

The questions that remain in my mind are: if Voigt’s parents had not sent him to an excellent school would he have accomplished what he did? And also: how many exceptional people have not fulfilled their promise because of poor schooling?




FOOTNOTES​
1. Letter of 19.7.57 to Mc.C. Christison (Dulwich College Archives).
2. Letter of 17.4.36 to The Allenian (Ibid.).
3. Photo taken 1967. Inspection of the Electoral Register for 1947 does not identify the house number for “The Courts”, Silverdale nor is the name ‘Voigt’ listed. The reason for this absence may well be because Voigt rented the premises. His landlord was "the local department store" (sic).14 The factory moved to No.15 Silverdale in March 1945 (see ref: 101 below).
4. Paul Voigt’s contribution to Audio, British Kinematography, Sound and Television 52, p.316-327, Oct.1970.
5. Photo of Voigt (date unknown) shown with early Lowther-Voigt driver and horn.
6. Address by Voigt to the British Sound Recording Association on their 21st anniversary in September 1957. The full text of this address is available online.
7. See Speaker Builder 4/81, p.22 for ads originally published in The Gramophone in 1937 and for his Canadian career; see also REFERENCE #11 (obituary).
8. Information for this part is derived from an interview with JOHN GILBERT recorded in May 1984 (Tape C90/54/01 in the British Library Sound Archives). The P.O. Commercial Directories for 1923 and 1927 shew that the J.E. Hough Ltd. factory (later Edison Bell factory) was at 62 Glengall Rd. The photos are from a booklet entitled “The Story of Edison Bell”. This factory was established in 1903 and demolished in the 1960s. The site is now a wasteland (April 2010). A lot of recollection from Voigt in his Hough/Edison Bell days, in his own words, came from letters from Canada (see ‘Paul Voigt and Edison Bell’, by Percy Wilson, the Gramophone, Nov.1965, p.269, & Dec 1965, p.326.
9. See Speaker Builder issue 2/1981 for an excellent article on Voigt. See, also, SB issue 3/1981. Dr. Bruce Edgar has done a magnificent job.
10. The information in this section was obtained from Tape C90/63/01 in the British Library Sound Archives- an interview with DONALD ALDOUS, recorded Sept. 1984.
11. Sound Reproduction, Proceedings of the British Kinematography Society#7, 4 January 1932 gives some background.
12. Journal of the Audio Engineering Society, VOL 29-4, April 1981, p.308. [Obituary by Geoffrey Wilson and Paul Klipsch].
13. See Reference #18 (below).
14. Letter dated 12 Jan1972 to Thomson of the BSRA (re: Blumlein), IET Archives (Institution of Engineering and Technology, London).
15. Letter to Seymour, 3&4 Dec. 1979, Brighton, Ontario, Canada, IET Archives.
16. Information in this paragraph provided by Bjarne Rasmussen (May 2014).
17. IET ref: UK0108 SC MSS 170 1 82 4, p.1. Permission to use IET Archive image acknowledged.
18. After Voigt’s death Ida Voigt gave photos, Voigt's diaries, design drawings and other items to Bruce Edgar. Edgar later sold these to John Howes. Howes gave the photos to B.G. Rasmussen.


REFERENCES​

1. Interview with Dr. Bruce Edgar, Positive Feedback 1996.
2. Hi Fi World, London, June 1994, p.58.
3. P.G.A.H. Voigt, Address to the British Sound Recording Association, Sept. 1957.
4. Sound Practices, Austin, Texas, Winter 1994-5, Vol 2:4 , issue 8, p.11-23.
5. Cabinets For Speakers-II, P. Wilson, The Gramophone, Jan 1937, p.354 [Voigt corner horn discussed].
6. Tape C90/63/01 NP1046WR- British Library Sound Archives.
7. Tape C90/54/01 NP10398WR- British Library Sound Archives.
8. Speaker Builder, Peterborough, New Hampshire, U.S.A. 2/81, 3/81, 4/81 article by Dr. Bruce Edgar.
9. Sound Reproduction, Proceedings of the British Kinematography Society #7, 4 January 1932.
10. Dulwich College Archives.
11. Journal of the Audio Engineering Society, vol. 29-4, April 1981, p.308 obituary.

Wireless World:
11A. [REPORT], Wireless and Experimental Association, (Voigt read paper Re: losses in inductance in wireless plant; also described an ingenious switch for connecting head gear telephones in series or parallel), Aug 7, 1920, p.354.
11B. [REPORT], Wireless and Experimental Association, (Voigt traced transformation of energy from electrical to mechanical circuits and demonstrated advantages of having telephones of the same resistance as the crystal detector), Nov. 13, 1920, p. 586.
11C. [REPORT], Wireless and Experimental Association, (Voigt read a paper on inductances and how he obtained unusual efficiency), Feb 19, 1920, p.812.
11D. [REPORT], (Voigt cleared up points about pancake coils and their use), March 19, 1921, p.872.
12. Voigt [REPORT], Wireless and Experimental Association, (lecture by Voigt on the construction and use of logarithm tables), April 16, 1921, p.54.
13. Voigt (REPORT], Wireless and Experimental Association, ‘Mr. Voigt elected to represent the intermediate junior members’, June 11, 1921, p.175.
14. Voigt [REPORT], Wireless and Experimental Association, ‘Mr. Voigt dealt with electrostatic attraction between metals and semi insulators’, July 23, 1921, p.270.
15. Voigt [REPORT], Wireless and Experimental Association, ‘Voigt wanted to know if any substance was an insulator at 200 degrees C’, Oct 15, 1921, p.454.
16. Voigt [REPORT], Wireless and Experimental Association, ‘Voigt elected Installation Engineer’, Oct 29, 1921, p.487.
17. Voigt [ARTICLE] Simultaneous high and low frequency amplification, Dec. 10, 1921, p.560-562.
18. Voigt [REPORT], Wireless and Experimental Association, ‘Voigt dealt with whether a three- plate condenser changed capacity if the middle plate changed its position’, Dec 10, 1921, p.576.
20. Voigt [REPORT], Wireless and Experimental Association, Prize for competition ‘describe the best wireless telephone transmitting circuit’. Prize divided between Voigt and Kloots, Dec 24, 1921, p.606
21. Voigt [ARTICLE], Further Observations on Simultaneous HF and LF Amplification, May 27, 1922, p.249-252.
22. Voigt Loud Speaker Curves and their Interpretation, 25 Nov 1932, p.474 and 2 Dec 1932, p.500
23. ‘Voigt Loud Speakers’, Sept 29,1933 ,p.274
24. Voigt [ADVERT](Tractrix Horn 4 ft.)21 Oct 1932, p.5.
25. Voigt [TRADE NOTE] Voigt Patents is moving, W.W. July 21, 1933, p. 43.
26.Voigt Loud Speaker [ADVERT+PHOTO+SPECS], 25Aug 1933, p.11
27. Voigt ]ADVERT](Public Address Loud Speaker), 6 Oct 1933, p.2
28. Voigt [LETTER]Double Channel Transmission, 13 Oct 1933, p.310
29. Voigt [LETTER] Loud Speaker Response Curves , 8 Dec 1933, p.451
30. Voigt [ADVERT]Calibration Services [ADVERT] 15 Dec 1933, p.10
31. Voigt Domestic Model Loud Speaker, 2 Feb 1934, (inside front cover)
32. Voigt [REVIEW] Twin-diaphragm Loud Speaker, 9 Mar 1934, p.169
33. Voigt [ADVERT](Horn Loud Speaker & 2 ft. mouth), 16 Mar 1934, p.3
34. Voigt [REVIEW]Loud Speaker- new diaphragm) 25 May 1934, p.360
35. ‘Voigt Loud Speaker at Dirt Track ‘[360degree outdoor horn+photo], July 6, 1934, p.14
36. Voigt [LETTER]Transients,10 Aug 1934, p.112
37. Voigt [REPORT+PHOTO] Protected Loud Speaker,, 24 Aug 1934, p.178
38. Voigt Loudspeakers [ADVERT with extensive comments + photo] 14 Sept 1934, p.7
39. Voigt 'Weakest Link' [ADVERT for demos] 16 Nov 1934, p.15
40. Voigt [LETTER], Film Recording, 30 Nov 1934, p.448
41. Voigt [ADVERT](Announcement of Bass Chamber), 14 Dec 1934, p.17
42. Voigt Construction etc. of Domestic Loud Speaker + diagram of choke [ANONYMOUS ARTICLE PROBABLY WRITTEN BY VOIGT+ photo of internal with front panels removed] 28 Dec 1934, p.561
43. Voigt [ADVERT] re: distributor for corner horn+ PA protected unit +photo, 11 Jan 1935, p.11
44. Voigt [ADVERT] intermediate unit (4x10 7 Erg3/SEC.) 15 Feb 1935,p.13
45. Voigt [ADVERT- P.B.T.D.F.S. test for PA system] 15 Mar 1935, p.7
46. Voigt [ADVERT-‘No single response curve is adequate’ + photo of corner horn in corner] 10 May 1935, (inside back cover)
47. Voigt [ADVERT] Home Constructor’s Corner Horn+photo, 7 June 1935 (inside back cover)
48. Voigt [LETTER] High Fidelity, June 7, 1935,p.577.
49. Voigt [ADVERT] PA centering device+photo, 28 June 1935, p.6
50. Voigt [ADVERT] diaphragm with increased middle register- 12 July 1935, p.8
51. Voigt [ADVERT] Double Power Centering Devices-19 July1935, p.3
52. Voigt [ADVERT] Olympia demo: organ music down to 32Hz, 6 Sept,1935,(back cover)
53. Voigt [ADVERT]- Defence of Voigt Loud Speaker (written and signed by Voigt), 22 Nov 1935, p.9
54. Voigt [ADVERT]- Corner Horn Cabinet designed by J.H. Butler, Esq.] 13 Dec 1935,p.7.
55. Voigt [NEWS] 4ft square horn, Mar. 15, 1936, p. 308.
56. Voigt [LETTER] Shutdown of the Little Nationals transmitter, Apr. ?, 1936, p. 350.
57. Voigt Sound Distribution in PA work (Some Acoustic Considerations Affecting the Placing of Loud Speakers) [stresses the importance of Phase] 20 Mar 1936, P.293
58. ‘Two Channel Reproduction’[stereo demo at Institution of Electrical Engineering] 10 April 1936, p.363.
59. [NEWS] outdoor PA speaker (P. Voigt? hosing down speaker w. mains applied), July 17, 1936, p.?
60. Voigt [ARTICLE] Cabinet or Baffle ? (Discussion of resonance vs. Voigt domestic horn}. Aug. 28, 1936, p. 201-202.
61. Voigt 'Television Interference', 11 Sept 1936, p.292
62. Voigt 'Collaborating With the Architect’, Feb 5,1937, p.118.
63.[NEWS] Voigt PA speaker, Feb. 15, 1937, p. 139.
64. Voigt [REVIEW] Voigt, HC Horn [simplified design; cutoff 60Hz but goes down to 40Hz +photo] 26 Feb 1937, p.212
65. Voigt [LETTER] Horn- loaded Moving Coil Loud Speakers (covers baffles, diaphragm, velocity, load, efficiency, corner horn) 26 Mar 1937, p.308
66. Voigt [LETTER: Horn –loaded MC Speaker (again) re: baffle air loading/impedance/beaming] 28 May 1937, p.524
67. Voigt [LETTER: Horn- loaded MC Speaker (yet again); wood v. concrete; bonding wood to concrete] 11 June 1937, p.566
68. Voigt [LETTER] Transient Response (Real and Fictitious Transients…), 30 July1937, p.90.
69. [ADVERT/NEWS], (Interesting cabinets. Display of Voigt/Lowther special order, beautiful system), Aug. 6, 1937, p. 127.
70. Voigt [LETTER] Transient Response (response), 3 Sept 1937, p.250.
71. Voigt [LETTER], Voigt replies again,(more thorough reply of transient response, a "thread" of many reader letters), Oct. 15, 1937, p. 390-392.
72. Voigt [LETTER] Volume (Range) and Quality, 3 Mar 1938, p.199.
73. Voigt [ADVERT] (Voigt speaker demo during audio show), Aug. 25, 1938, p. 103.
74. [LOWTHER], (beautiful, massive ‘receiver’ with all bells and whistles, looks like a marine radio), Sep. 15, 1938, p. 103.
75. Voigt [LETTER] Broadcast Frequency Tests, 13 Oct 1938, p.335
76. Voigt [LETTER] Pick-up Resonances, 17 Nov 1938, p.446
77. Voigt [LETTER] Is U-S-W Quality a Myth?, 5 Jan 1939,p.19
78. Voigt [ADVERT] Light Coil Twin Diaphragm, 5 Jan 1939, p.8
79 Voigt [REVIEW] Light Coil Twin Diaphragm, 9 Mar 1939, p.223
80. Voigt [ADVERT] Demonstration Week, 9 Feb 1939, p.2
81. Voigt [ADVERT] Deferred Delivery Account, 23 Feb 1939, p.5
82. Voigt [ADVERT] A Modern Minstrel, 9 Mar 1939
86. [Test of Voigt TWIN DIAGHRAM LOUDSPEAKER with 4 ft. horn], March 29, 1939, p.318
87.Voigt [ADVERT] P.A. for Hire, 27 April 1939, p.7
88.Voigt [ADVERT] Modern Minstrel Tours, 4 May 1939,p.1
89. Voigt [ADVERT] Deferred Delivery Made Easy, 18 May 1939, p.2
90. Voigt [ADVERT] H.C. Horn + Bass Chamber, 8 June 1939, p.3
91. Voigt [LETTER] High Quality Recordings, 13 July 1939, p.40
92. Voigt [ADVERT] (listen to a Voigt speaker) 17 Aug 1939, p.2
93. Voigt [LETTER] Reproduction Levels (of interest to flat dwellers), 24 Aug 1939, p.183
94. Voigt [ADVERT +CARTOON] ‘Mr. Tit’, 24 Aug 1939, p.17
95. Voigt [ADVERT+PHOTO] Home Constructor’s Corner Horn, Nov 1939,p.15
96. Voigt [ADVERT] permanent magnet v. electro-magnet, Dec 1939, p.17
97. Voigt, P.G.A.H. Loudspeaker Damping, Dec.1947, p.487-8
98. Voigt Permanent Magnet Loudspeaker, March 1949, p.103
99. Voigt [ADVERT] Beat the Blackout (advice on equipment to use with Voigt loud speakers), Jan 1940,p.14
100. Voigt [ADVERT] (2 watts is enough for the home), Feb 1940, p.13
101. Voigt ‘Getting the Best From Records: Pt.1, The Recording Characteristic’, Feb 1940, p.141
102. Voigt ‘Getting the Best from Records: Pt.II, The Pick up, Mar 1940, p.177
103. Voigt [ADVERT] Experimental MC pickup, Mar 1940, p.13.
104. Voigt ‘Getting the Best from Records: Pt.III, Tone Correction Circuits’, April 1940, p.210
105. Voigt [ADVERT] (Re: new pickup armatures), April 1940, p.11
106. Voigt ‘Getting the Best from Records: Pt.IV, The Record has the Last Word’ May 1940, p.242.
107. Voigt [ADVERT+PHOTO] D.C.Twin Diaphragm Speaker, May 1940, P.35
108. Voigt MC Pickup [REVIEW +PHOTO+DIAGRAM], June 1940, p.301
109. Voigt [ADVERT] Development of Needle Restoring Force equipment, July 1940, p.11
110. Voigt [ADVERT+CARTOON] (low output pickup needs extra valve), Aug 1940, p.9
111. Voigt [ADVERT+SPECS FOR PICKUP], Sept 1940, p.10
112. Voigt [LETTER] ‘Appreciation of Quality’, Oct 1940, p.441
113. Voigt [ADVERT] (more pickup specifications), Oct 1940, p.12
114. Voigt [ADVERT+PHOTO] MC pickup, Nov 1940, inside back cover
115. Voigt [ADVERT] Moving Coil Pickup (with spec on ‘reproducing point stiffness), Jan 1941, inside back cover
116. Voigt [ADVERT] 2 ft. Mouth Horn (for limited space), April 1941, p.15
117. Voigt ]ADVERT] Voltage Regulator (£5), Dec 1941, p.20
118. Voigt [ADVERT] (Our Post War Delivery Scheme), May 1942, p.20
119. Voigt [ADVERT] (Our Post War Delivery Scheme), July 1942, p.20
120. Voigt [ADVERT] (Save to Spend; why not!) Aug 1942, p.23
121. Voigt [ADVERT] (possible cancellation of names on our Pick-up waiting list), Oct 1942, p.24
122. Voigt [ADVERT] (Voigt wish: a Victorious New Year and a return to the good things in life), Jan 1943, p.32
123. Voigt [ADVERT] (for high quality loud speakers when the good times come again), Mar 1943, p.30
124. Voigt [ADVERT] (we shall be closed for rest- +cartoon), Sept 1944,p.28
125. Voigt [ADVERT] (moving to No.15 Silverdale- +cartoon, Mar 1945, p.26
126. Voigt[ADVERT] (“Look forward to private enterprise again free to ‘lift’ life above the utility level”), May 1945, p.31
127. Voigt [ADVERT] (“We look forward to the right to go ahead in our own way and improve the standard of reproduction”), Sept 1945, p.26
128. Voigt [ADVERT] (+political message), Jan 1946, p.34
129. Voigt [ADVERT] ( apologies: our post war plans frustrated), Mar 1946, p.30
130. Voigt [ADVERT+CARTOON](please don’t write, phone or call), Sept 1947, p.40
131. Voigt [ADVERT+CARTOON](Voigt at the verge of a breakdown), Oct 1947, p.73
132. Voigt [LETTER+PATENTED SCHEMATIC], Loudspeaker Damping, Dec 1947, p.487
133. Voigt [ADVERT+CARTOON] (Loudspeaker service still, but advise must await improvement in Voigt’s health), Mar 1948, p.52
134.Voigt [ADVERT+SLOGAN](a few Domestic Corner Horns soon available at 3 x pre-war price), Aug 1948, p.34
135. Voigt [ADVERT](prices for corner horns + Voigt not yet fit + price of timber worsening), Oct 1948, p.54
136. Voigt [ADVERT](gap in horn production impends+ PM units soon available), Nov 1948, p.58
137. Voigt [ADVERT](‘to those who do not yet own a Voigt speaker we wish the best xmas possible in the circumstances’), Jan 1949, p.70
138. Voigt [ADVERT](‘After years of experimenting Mr. Voigt has designed a P.M. unit of the open, low leakage type’), Feb 1949, p.68
139. Voigt [REVIEW] Voigt Permanent-Magnet Loudspeaker, Mar 1949, p.103
140. Voigt [ADVERT+PHOTO](‘Time Limit fixed under Town & Country Planning Regulations! Work has been started on the last batch of Domestic Reflector Type Corner Horns to be made at this address’), Mar 1949, p.68
141. Voigt [ADVERT+CARTOON] (Voigt Patents Ltd. Being kicked out of 15 Silverdale, S.E.26), Jul 1949, p.70
142. Voigt [ADVERT](contains LONG letter signed by Voigt concerning the following topics: ‘my health, technical points on loudspeaker- diaphragm, price of Voigt products, change of address, move to Toronto+ teach boat builder to build horns'), Sept 1949, p.33
143. Voigt [ADVERT] (visit stand 165 National Hall to see Lowther-Voigt equipment), Oct 1949, p.102
144. Voigt [LETTER] Quality of BBC Transmissions, Nov. 1949, p.462
145. Voigt [ADVERT] (revisiting details of interchangeable pole tips on Voigt Senior P.M. Units), Dec 1949, p.68
146 Voigt[ADVERT](new re-matched diaphragm for Senior P.M. units + Voigt not recovered fully),Jan1950, p.85
147. Voigt [ADVERT+PHOTO](P.M. unit, text details the difference between ‘THE REALISTIC’ and THE IDEALISTIC’ magnets, Feb 1950, p.66
148. Voigt [ADVERT+PHOTO](‘we are designing a unit with a less powerful magnet & simpler horn- nearly as good’, [H.C. type with bass chamber]), Mar 1950, p.42
149. Voigt[ADVERT](rematched diaphragm slightly less efficient but extreme ends of the scale have been improved), April 1950, p.82
150. Voigt [ADVERT+CARTOON](contains letter from Mr. Voigt outlining treatment for his spinal condition + move to Toronto + demonstration service at No. 7 The Parade, Wells Park Rd., Sydenham SE26), May 1950, p.87
151. Voigt [ADVERT](extensive text giving details of history of Voigt flux densities- now increased by 40% over the original 16,000 gauss), June 1950, p.32
152. Voigt [ADVERT](home demos arranged in London area), Nov. 1950, p.114
153. Voigt [ADVERT](‘Voigt designs lead the way….demonstrations in Toronto, Canada by arrangement with Mr. Voigt’),May 1952, p.112
154. Voigt [LETTER](resistor colour coding:…”and I trust that [‘spot colour coding’]soon may become a radio crime…the third band is very important and it should be made as wide as possible…”), Sept 1952, p.355-6
155. Voigt [ADVERT](count the types of corner horns on show this year…in 1934 ours was the only one-certainly the only full size one), Sept 1952, p.132
156. Voigt [ADVERT](in 1933 we introduced the twin diaphragm- Patent NO. 413,758), Nov 1952, p.116
157. Voigt [ADVERT](in the early 1920’s Voigt recognised the error of baffle- type speakers. Horn loaded Voigt speakers were selling by 1929.), Jan 1953, p.124
158. Voigt [ADVERT] (customs & Excise accept that Voigt P.M. speakers are not subject to tax. They are exempt from purchase tax. Production is being resumed and we hold to the old price of £40 ex works “if we can”), Sept 1953, p.152

________________________________​



Journal of the Institution of Electrical Engineers (J.I.E.E.):
159. [Salomans Scholarships (value £50, tenable for one year)- awarded to…P.G.A. Voigt (sic), University College, London- (student on the Register of the Institution), Vol. 60, 1922, p.529.
160. Voigt, Dull-emitting thermionic valves (re: hopes of restoring emission), Vol. 62, 1924, p.698
161. Voigt, Loud- speakers (long contribution re: efficiency, compensation, distortion, resistance- coupled v transformer- coupled amplifiers), Vol. 62, 1924, p.296.
162. Voigt, Acoustic and Telephone Measurements, Vol. LXXI, 1932, p.632.
163. Voigt, Testing Radio Receivers, Vol. LXXI, 1932, p.130.
164. Voigt, Droitwich Broadcasting Station, Vol. LXXVII, 1935, p.478.
165. Voigt, Acoustical Design of Broadcasting Studios, Vol. LXXVIII, 1936, p.429.
166. Voigt, Asymmetric- sideband broadcasting, Vol. LXXXIII, 1938, p.72.
167. Voigt, Instruments incorporating thermionic valves, Vol. LXXXV, 1939, p.265.
168. Voigt, London television audio-frequency equipment (ibid), p.463.
169. Voigt, Design of a Loud-speaker, Vol. LXXXIX, 1940, p.448
170. Voigt, Public address systems, Vol. LXXXIX, 1942, p.136.
171. Voigt, New type of electron- optical voltmeter, Vol. 91, Pt II, 1944, p.516
172. Voigt, Problem of post-war television, Vol. 91, 1944, p.174
173. Voigt, High Fidelity disc recording equipment, Vol. 94, Pt.III, NO. 27, 1947, p.297 [see, also. Mr. H. Davies reply: “…Mr. Voigt’s demonstration of how closely the BBC recording characteristic resembles that used by himself in 1927 is of considerable interest… it would be wise to regard the extremely close agreement shown in Fig. D as owing something to coincidence…”]
174. Voigt [LETTER] (Symbols for Space Co-Ordinates), undated, Journal IEE, (circa Feb 1960).
175. Voigt [LETTER], Rule of thumb and fingers (Maxwell’s corkscrew rule), 10 June 1962, p.349.
_________________________________________________

​

Radio Electronics
176. Voigt [LETTER OF REPLY], (Voigt elaborates details by the editor in the previous issue), Voigt extends with many details the intro by the editor in the previous issue, Mar., p. 16, 1959.
177. Voigt, P.G.A.H., A Box for Your Speaker, Radio- Electronics, Jan 1959, p.48
178. Voigt, P.G.A.H., [SERIES OF ARTICLES], All About the Reflex Enclosure, Pt. 1, Radio- Electronics, Feb. 1959, p.38[see March issue (Author Replies) [Voigt corrects details]
179. Voigt [LETTER OF REPLY], (Voigt elaborates details by the editor in the previous issue), Voigt extends with many details the intro by the editor in the previous issue, Mar., p. 16, 1959.
180. Voigt, P.G.A.H. [LETTER], Reflex Correction, Radio- Electronics, April 1959, p.24 + [ARTICLE CONTINUED] Pt. II, p.82.
181. [ARTICLE CONT.] Pt. III, May 1959, p.56
182. “ “ Pt. IV, June 1959, p.55
183. “ “ Pt. V, July 1959, p.76
184. “ “ Pt. VI, Aug 1959, p.39
185. “ “ Pt. VII, Sept 1959, p.72 [Briggs: Shredded Wheat as Damping]
186. Voigt [LETTER], A Correction, Radio- Electronics, Oct 1959, p.28
187. Voigt, P.G.A.H., All About the Reflex Enclosure (conclusion), Nov 1959, p.78.
______________________________________________​

Audio Engineering
188. Voigt, P.G.A.H. ‘A Controversial Idea from England’, Audio Engineering, Oct. 1950 [hole in the wall].
____________________________________​




ACKNOWLEDGEMENTS​

1. The Master, Dulwich College, London for access to the archives of the college. The documents in APPENDIX 3 and the letters of 17 April 1936 and 19 July 1957 are reproduced with kind permission of the Governors of Dulwich College. Special thanks to C.M. LUCY the Keeper of the Archives.
2. JOHN COULTER, Local Studies & Archives, London Borough of Lewisham for photo taken in 1967 before the buildings, including "The Courts", were torn down for redevelopment [my ref for this photo:117] [photo of “Bowden Mount” taken by me 16.5.94, ref: 117/11].
3. ANDREAS MAU, Nortorf, Germany (photo of Paul Voigt with his double cone driver) [my ref: 117/PM2].
4. Dr. R.B. PERKS, Curator, Oral History, British Library Sound Archives for permission to reproduce passages from Tapes C90/63/01 & C90/54/01.
5. Library Archives, Canada, Ottawa, ON: CLAIRE BANTON, Reference Services, for granting me a worldwide licence to republish Canadian Crown Copyright File No.2009/10/28412 reproduced with kind permission of the Minister of Public Works & Government Services Canada SOURCE: Library & Archives, Canada/Paul Voigt fonds/MUS 42.
6. Local Studies Library, John Harvard Library, Borough, Southwark.
7. AXEL SABASS.
8. ANNE LOCKER, Archivist, IET, London.
9. JASON MURRAY, Manager, British Library (Humanities 2).
10. DR. JOHN MITCHELL, UCL Electrical Engineering Department for providing glass slides of the Pender Lab from the Fleming archive.
11. BARBARA ANN VOIGT for information, photographs and interview.
12. ROBERT WINCKWORTH, UCL Records Office for 1921-2 copies.
13. JON CABLE, Asst. Archivist IET, for extensive assistance, information and permission to use IET Archive images.
14. Photos of and information about the family published by kind permission of the Voigt family and BJARNE G. RASMUSSEN.
15. The Lowther Voigt museum archive for permission to use photos of the Wireless and Experimental Association.
16.TED KEMP, Research Librarian, IET.
17. B.G.RASMUSSEN for extensive work on and relating to this Voigt thread and, also, assistance rendered to me in connexion with the REFERENCE section.

_____________________________________​



APPENDIX 1​
The following is a HAND LIST of photos and documents in the Canadian archives (see ACKNOWLEDGEMENT #5 above). These were deposited by Mrs. Voigt after Voigt’s death.
(see below)


National Libra/y 8ibiiotheqLe naNc;1a,e
of Canada du Canada

GENERAL INVENTOR
MUSIC DIVISION INVENTAIRE GENERAL
DIVISION DE LA MUSIQUE
1982-13 Paul VOIGT Collection
Voigt, Paul, ? -1981
Papers. 1926-1929 6 em.
Sound engineer sent to Eastern Europe (for recording expeditions) by L1e English record label Edison-Bell in the late 19208. "Famous for his accomplishments in the development of recording technology... "1 Died in Brighton. Ontario. February 9, 1981.
5 diaries containing notes concerning recordings, made in Peckham, Bucharest, Budapest and Zagreb between 1926 and 1929; 12 cm. of 6~ x 7~ cm. index cards with brief notes concerning recordings; 5 photographs, some of them showing gipsy bands and recording room in Bucharest.
Finding aid available.
No restrictions on consultation.
___________________________________________________________________________________

1. Parker, Gerald. "Music Collection Awaits Docmentation", SEM Ne'<ls¬~.vol. 21, no. 1, Jan. 1987, p 3.
Canada




Paul VOIGT Collection
1982-13


VOIGT, Paul (? 1981) Sound engineer
for Edison-Bell record company
Funding aid for papers
received November 2, 1981
Papers, 1926-1929 & n.d.; 6 am.

A Notes on recordings, 1926-1929, n.d., 5 cm,

Box Folder
I 1-2 Diaries containing notes concerning
recordings in Peckham, Bucharest,
Budapest and Zagreb; 1926-1929, 5
Items

3 Notes concerning recordings in Eastern
Europe, London and in Commodore
Cinema; 1927 -1933, 2 items.

4 Index cards (6* x 7* cm.) with brief notes on
recordings in Zagreb, Budapest and Bucharest; n.d.,3 cm.



B. Photographs, 1928-1929, n.d .. 5 items.

I 5 Photographs showing Mar[ail and
Schmidt with gipsy bands in
[Bucharest] ; [Ciorcbea] carrying a
long "tube" (native pipe) in
Bucharest; Paul [Voigt] and other
persons outside the cinema where
recordings were made; a recording
room; 1928-1929, n.d., 5 items.

See also Recorded Sound Section.

Jeannine Barriault
October 1987

It seems surprising and unfortunate that apparently so little was deposited. I would urge anyone who may have any documentary or other material relating to Voigt to deposit this for the use of future researchers.

Deposits may be made at The Institution of Engineering and Technology (formerly the Institution of Electrical Engineering), Savoy Place, London WC2R OBL. U.K. This Institution has a Voigt Archive. They can be contacted via email: [email protected]
 PLEASE SEE POST #127 FOR FULL INFORMATION ON THE VOIGT IET ARCHIVES.









APPENDIX 2​

CONTENTS​
1. Letter of 12.1.1973 to E.P. Thomson.
2. Letter of 21.9.1957 to BSRA.
3. Letter of 14.8.1969 to J.E. Wright.
4. Letter of 25.8.1969 to Voigt.


1. What follows is the long letter from Voigt to IEE concerning Alan Dower Blumlein, dated 29 November 1972 sent from Canada. [Please see ACKNOWLEGEMENT NO. 13 (above)].

SC MSS 170 1 82 3 page 1 by Round Person, on Flickr

SC MSS 170 1 82 3 page 2 by Round Person, on Flickr

SC MSS 170 1 82 3 page 3 by Round Person, on Flickr

SC MSS 170 1 82 3 page 4 by Round Person, on Flickr

SC MSS 170 1 82 3 page 5 by Round Person, on Flickr


SC MSS 170 1 82 3 page 6 by Round Person, on Flickr

SC MSS 170 1 82 3 page 7 by Round Person, on Flickr


SC MSS 170 1 82 3 page 8 by Round Person, on Flickr

SC MSS 170 1 82 3 page 9 by Round Person, on Flickr

SC MSS 170 1 82 3 page 10 by Round Person, on Flickr






SC MSS 170 1 82 3 page 11 by Round Person, on Flickr

SC MSS 170 1 82 3 page 12 by Round Person, on Flickr


SC MSS 170 1 82 3 page 13 by Round Person, on Flickr

SC MSS 170 1 82 3 page 14 by Round Person, on Flickr


SC MSS 170 1 82 3 page 15 by Round Person, on Flickr

SC MSS 170 1 82 3 page 16 by Round Person, on Flickr


SC MSS 170 1 82 3 page 17 by Round Person, on Flickr

SC MSS 170 1 82 3 page 18 by Round Person, on Flickr

SC MSS 170 1 82 3 page 19 by Round Person, on Flickr


SC MSS 170 1 82 3 page 20 by Round Person, on Flickr





2. What follows is the speech given to the British Sound Recording Association. This speech was recorded on tape in Canada and sent to England and played back at the meeting.

[Please see ACKNOWLEDGEMENT NO. 13 (above)].
SC MSS 170 1 82 2 page 1 by Round Person, on Flickr

SC MSS 170 1 82 2 page 2 by Round Person, on Flickr


SC MSS 170 1 82 2 page 3 by Round Person, on Flickr

SC MSS 170 1 82 2 page 4 by Round Person, on Flickr

SC MSS 170 1 82 2 page 5 by Round Person, on Flickr


SC MSS 170 1 82 2 page 6 by Round Person, on Flickr





3. What follows is the letter sent by Voigt to J.E. Wright, Librarian of I.E.E. It is dated 14 August 1969. In this letter Voigt sets out in great detail, the history of what he has been doing since 1950. It was posted from Canada. [Please see ACKNOWLEDGEMENT NO. 13 (above)].

IET DEP 06 03 04 - Letter from PGAH Voigt to JE Wright 14 Aug 1969 - Page 1 (1) by Round Person, on Flickr

IET DEP 06 03 04 - Letter from PGAH Voigt to JE Wright 14 Aug 1969 - Page 2 by Round Person, on Flickr


IET DEP 06 03 04 - Letter from PGAH Voigt to JE Wright 14 Aug 1969 - Page 3 by .


[url=https://flic.kr/p/CC8sbj]IET DEP 06 03 04 - Letter from JE Wright to PGAH Voigt 25 Aug 1969 by Round Person, on Flickr






APPENDIX 3​

Dulwich College Archives (Extracts)
With kind permission of the Governors of Dulwich College.

CONTENTS​
1. Postcard dated 15 December 1923 to the Alleyn Club
2. Dulwich College Register Serial Number 8680 (Questionnaire) issued 12.3. 1925
3. Dulwich College school records and syllabus
4. Letter to McC. Christison, 19 July 1957


1. Postcard

_S871275 by Round Person, on Flickr




2. Dulwich College Register (Questionnaire)

voigt by Round Person, on Flickr

voigt p2 by Round Person, on Flickr





3.1 Handwritten entry No.8680 8536 (1915)
3.2 continued (later historical entry)
3.3 entry (PRINTED EDITION) Dulwich College Register

_DSF2037b by Round Person, on Flickr



_DSF2038b by Round Person, on Flickr



_DSF2039a by Round Person, on Flickr



3. Dulwich College school records and syllabus

_DSF2071 by Round Person, on Flickr

_DSF2072 by Round Person, on Flickr

_DSF2074 by Round Person, on Flickr

_DSF2075 by Round Person, on Flickr

_DSF2076 by Round Person, on Flickr

_DSF2077 by Round Person, on Flickr



4. Letter to McC. Christison, 19 July 1957

_DSF2106 by Round Person, on Flickr





_DSF2107 by Round Person, on Flickr


_DSF2109 by Round Person, on Flickr
 
I am obliged to Chuck No Cal for the following link

http://www.lencoheaven.net/forum/ind..._next=prev#new

It seems that this diagram is not the original VOIGT home constructor blueprint. I would expect to see dimensions and details of driver mount etc. for this to be of practical use: nevertheless it is a start.

If anyone has a copy of the original please post it on this thread.
 
Many thanks, Chuck

Do let us know after you build (one or two for stereo?) and what driver you use.

I live not far from the Lowther factory. If I can be of any assistance please let me know.
 
I'll be sure to check in once I get serious about constructing...

I plan to just build one (mono)...

My current design goals being a small footprint, high efficiency, realistic dynamics, and a system that sounds good even if you are not sitting in the "sweet spot"....I think the Voigt Home Constructor Horn fits the bill...I would really love to find an original Voigt Domestic Corner Horn but those are virtually unattainable here is the states....
 
Further research has led to my finding an article in Wireless World-[issue of 28 December , 1934, p.561- entitled ‘Voigt Domestic Loud Speaker- Construction and Performance of the Latest Corner Cabinet Type Horn’]

The article is anonymous but I surmise that it was written by Voigt himself. It contains a photo of the exterior of the cabinet and a cutaway side view diagram. Most importantly, there is a photo of the INTERIOR with Front Panels removed. This shows alternative sound paths.

I believe that this article, and especially the photo, would be of use to anyone constructing the speaker or the simplified Home Constructor’s version, and would suggest that constructors obtain a photocopy.

I have also found a photo of the finished Home Constructor's Horn, but it is not as useful as the photo in the 28 December 1934 issue (abovementioned). It shows only the front exterior. The front exterior photo is inside the back cover in the 7 June 1935 issue.
 
At last my dream of hearing an original Voigt Domestic Corner Horn has come true.
I thank addict for arranging this, Markse for enabling it and, especially, John Howes and his beautiful wife Brenda for their splendid hospitality and the visit to the Lowther-Voigt museum. And I especially thank John Howes for the opportunity he gave me to hear more than one original Voigt Domestic Corner Horn and fitted with a field- coil DC driver; a rare experience not experienced by most! John Howes even dismantled part of a Voigt horn so that I could see how the internal was constructed, my query being about the contiguity of the mouth.
 
I'm glad you enjoyed the visit. I'll probably have a pair of Domestic Voight horns myself next year.
 
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