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Avondale SE200 Announcement on FB

Discussion in 'd.i.y.' started by Richard Lines, Jul 29, 2022.

  1. nuit73

    nuit73 nuit73

    Hello,
    Yes,
    The two 220 package are the emitter resistors (1% resistors) on the SE 200 boards, this version is with the TO3 package transistor.
    TO3 is more and more difficult to find (TO3 are no longer made)

    The SE 230 is a TO 220 version and there is two paralleled transistor to have a much better power
    The result is outstanding
     
  2. laverda

    laverda pfm Member

    On the left is the first incarnation of the SE200, a prototype if you like from 1998. On the right the production board today with a new layout and few component and component values changes.

    Ozbrit: I suspect he has put SM emitter resistors under the PCB. Correct.

    You can see Ive used On Semi MJ15024/25 on the prototype, although using the MJ15003/004's to my ears sounds very slightly superior. I know not why or is it my imagination?

    I can confirm the original SE200 amp (left) sounds far superior compared to the NCC220 or Qudos or even the NCC300 and thats not just my opinion may who have had the opportunity to trial these amps are all saying the same thing 'amazing'. It truly is sonically outstanding.

    Dependant on rail voltage I think (to be confirmed but lets say 50Vdc) SE200 outputs about 80Watts the SE230 130watts the SE400 200+watts. The 230 and 400 will probably use On Semi TO-247 device but this could change as these are unavailable at present from the usual places.
    https://www.onsemi.com/pdf/datasheet/mjw3281a-d.pdf
    still early days though on these latter amp modules.

    And for all those asking, yes they will drop straight into a Naim amp.


    [​IMG]
     
  3. OzBrit Audio

    OzBrit Audio pfm Member

    Hi Richard

    Thanks for the feedback

    Well it sounds like these new boards have raised the bar by a considerable margin then. People were saying the same about the NCC300 a couple of years back and my own efforts of converting my NCC220's towards a 300 specification have been very rewarding so I have no reason to disbelieve any of the comments made about the new boards.

    But why on earth are you paying your music from the headphone output of a Mac with all that high end kit. Thats like buying a premium German sports car and then never taking it out of central London :). Is your Linn Exact just for a cinema setup (am guessing) with no stereo out?

    Cheers
     
  4. Richard Lines

    Richard Lines pfm Member

    There is no analogue out facility on the streamer............... and I don't have 10off SE boards............

    Regards

    Richard
     
  5. James Evans

    James Evans Bedroom Bodger

    Are these SE boards usable in a Voyager type config, with front end supplied by VBE etc? I'm just wondering about drop in compatibility for when I inevitably acquire a pair of boards!
     
  6. GWM

    GWM Lost in the 70's

    Was thinking the same thing, looks like the voltage stage is split with 100R resisters from the outlet so should be possible.
     
  7. Mike Hanson

    Mike Hanson Lovely!

    I have some of the earlier SE230 prototypes. It looks like it might be possible to split front and back. However, from what I understand the SE boards have significantly improved input stage supply regulation, so I'm not sure that you would benefit much from a Voyager-style configuration. I haven't heard anything official, though.
     
  8. James Evans

    James Evans Bedroom Bodger

    I did chat to Les at NWAS about the SE boards and when mentioning I was currently running Voyager config Qudos his response implied (I think) that there was no need/hadn't been tried, so that maybe answers my question. I was just wondering if anyone on here had tried it. I suppose when I do eventually acquire a pair I'll build something new and compare directly to the existing Qudos.
     
  9. Richard Lines

    Richard Lines pfm Member

    Believe me you don't need to faff about with the SE200 boards like the VBE modifications to the NCC200............., just drive them with a 500VA transformer based unregulated supply (although I'm sure a smaller transformer will be more than adequate) and sit back and prepare to be very pleasantly surprised..........

    I'm very keen to see what the SE230 will deliver over the SE200's.

    Regards

    Richard
     
  10. James Evans

    James Evans Bedroom Bodger

    As it happens I have a 500VA 30-0-30v transformer sat here feeling sorry for itself...
     
  11. Richard Lines

    Richard Lines pfm Member

    Good Afternoon All,

    Intriguing statement from LesW on FB in connection with his new soft start module:-

    The second model is mono using the SE module along with the HCR200 regulator supplying only the 'front end' of the module.

    Regards

    Richard
     
    Mike Hanson likes this.
  12. laverda

    laverda pfm Member

    James, (all) when you do get a chance to compare or a straight audition you will realise that these new SE series of amps are not just a bit better than the NCC their a big step up the sonic ladder, if fact quite a few steps. As of yet I have not felt the need or desire to 'voyager' these SE200s but you could if you so wished. (there is a dropper resistor to the front end).

    I'm quite keen for the SE230 or 400.
     
  13. andrewsutton

    andrewsutton pfm Member

    Just a small point concerning the thicker boards….I took a rather random approach to the build and needed to replace some of the polystyrene caps.
    Sucking the solder out of some of the wider holes, such as for the 1nF caps, is a bit of an undertaking.
    So it may be better to fit the polystyrene caps before any connected components which may affect on board testing go in.
    That way they can be fitted and tested on the board so you can be sure that they have not been fried.
    Just waiting for a Farnell delivery and a bit of time to make the aluminium heat spreaders.
    Here’s Andy.
     
  14. Richard Lines

    Richard Lines pfm Member

    Faced with that type of problem I heat the solder up with the board in one hand and then subject said board to a sharp blow on the work bench..... almost always works to clear plated through holes sufficiently to get replacement components in. If not an appropriate sized drill bit i.e. smaller then the plated hole diameter tidies things up.

    Regards

    Richard
     
    Mynamemynaim likes this.
  15. laverda

    laverda pfm Member

    And if your to generous with the solder a little to much can wick up the component legs. But being careful with the heat and solder application you can get a nice joint. (Both can be seen in the photo good and bad)

    and yes the 220uf is in the wrong way round...o_O

    [​IMG]
     
    Last edited: Sep 6, 2022
  16. 337alant

    337alant Negatively Biased

    OOOOH Vishay 1839 very nice:D
    Alan
     
    chiily likes this.
  17. laverda

    laverda pfm Member

    One of these is good for component removal from through hole plated and multi pin surface mount chips etc. Don't use it a lot but its great for those days when you need to make life easy....

    [​IMG]
     
    Mike Hanson likes this.
  18. Richard Lines

    Richard Lines pfm Member

    They're also very useful for repairing holes in the bottom of plastic kayaks................

    Regards

    Richard
     
  19. bencat

    bencat Amplifier Destroyer par excellence

    Apologies for asking a simplistic question but unlike lots adding to this my technical skills and knowledge are very poor . Having retired now for quite some time it is nice to dabble a bit in DIY . I have made my Linn Sara 9's into actives using a MiniDSP DDRC24D and this works really well . As far as i can tell the Avondale SE200 boards are direct replacement boards for Naim amplifiers ? And there is not too much work needed to drop in a new set or at least that seems to be what is being said. Does this mean any Naim Power amplifier could be upgraded in this way and get an uplift in sound quality ?

    I fully understand that climbing the Naim ladder with better power amplifiers will probably gain that much more from these boards but there will also be the huge increase in the cost of the amplifier. Could you buy a fairly entry level Power Amp such as say the 140 or 150 and add these ? Is there any other things that would need to be changed ?

    This is going to be a little bit of fun for me and I do not want to end spending huge sums so not looking for the ultimate upgrade but would be interested if this would be a somehting that could be done then perhaps added to later ?
     
  20. laverda

    laverda pfm Member

    Yes to all the above, other than there is an extra 0v connection but not much else. But in saying that Avondale (Les) has not disclosed if these modules will be available to the general DIY community.
     
    bencat and Mike Hanson like this.

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