Recent content by DPA_SERVICE

The hybrid DH-OA37 has mainly transistors and a few diodes on it. Much like the traditional DH-OA32 with the only exception being the Military epoxy blue coating. The snag being whilst I can now repair the DH-OA32, I cant repair the DH-OA37 because the coating cannot be removed. They are also...

I believe the Reviewer mentioned timing problems with the PDM3 but the price proved the killer and clearly showed that Walker and Clarke knew nothing of what the market could pay and they continued on with that pricing regime and attained sustained zero sales. As a colleage pointed out, they...

As for what Martin Clark said about design similarities with that which came before it? I gave Dave Clarke a lot of circuit diagrams and technical information regards Rob Watts designs so I know what Martin Clark thinks is quite true. So there should not have been any problems with grounding but...

As part of the design tantalums were the favourite capacitor of choice with Dave Clarke. These are a lot more stable than the cheap aluminium electrolitic caps. Your PDM3 is a sub assembly made version. One of the twenty that Walker and Clarke hoped to make themselves rich with, pity about the...

Only 20 of those PDM3 were made, not including the prototypes and the price you paid, it was sold for a loss in terms of the parts that make them up. There are no circuit diagrams or technical information that I know of other than what Dave Clarke holds and he never struck me as being kind in...

Adrian Walker set the price of the PDM3. Dave Clarke saw the profits. The only passion they had was greed. But where there is greed stupidity quickly follows. Sadly the designs in my opinion did not match the price tag as you clearly indicate in your message. There were other product designs but...

https://forum.audiogon.com/discussions/what-is-the-status-of-deltec-precision-audio-dpa Actually, Deltec still exists as such though it is a saga. When the PDM3 was reviewed five examples failed to win over the Reviewer. I am not sure what is happening with Martin Clark's Deltec site but I...

The " Deltec Lock " has different components and circuitry to Rob Watts original designs. I know because I built a few of them. Best person to talk to is Colin Yallop of Chevron Audio who was offered the work to do Deltran upgrades. I do not think that they worked very well. And unless Colin has...

You should check out the Audiogon site for refs regarding Deltec Precision Audio. Final version. You may have got your PDM3 on the cheap but there is no service function at all and the warranties are worthless.

I do have spare players to rebuild your player so all is not lost.

Are you sure it is a Teac drive? They did come from Teac players but I have a suspicion that they are not Teac mechanisms and may in fact be another lesser make. I have a service manual for a Goodmans CD700 that physically looks very similar in size to the supposed Teac. Of course the service...

The 12 volt dc bulbs have probably failed. Maplin used to be my source for replacements. But perhaps now ultra bright legs might be a better idea.

http://rover.ebay.com/rover/1/710-53481-19255-0/1?icep_ff3=2&toolid=10001&campid=5338728743&icep_item=222680655811 This is a mark one based mechanism which I am stunned still exists as after leaving the factory in Cardiff had a life expectancy of 2 weeks. Hundreds failed.

There is not very much to the Moving Magnet phono stage. Perhaps the mod wire connection has come adrift? First off you need to take the case off and look inside the amp. The disc stage electronics is bottom left looking from the rear of the amp.

I sent you a reply to your gmail account. It may have hit your junk mail filter?