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Amplifier Transformer Group Buy

Discussion in 'd.i.y.' started by 337alant, May 15, 2021.

  1. JimmyB

    JimmyB pfm Member

    Hi Alan,

    My preference would be to have the 250v option so I guess that's no2. 12v will be handy too I guess!

    Thanks for doing this,


    (Wot on earth am I going to use the current transformers for now? Will have to find some Qudos boards)
  2. say it as it is

    say it as it is pfm Member

    when you putting the order in? ie when you need payment trying to convince myself I don't need one of these!
    ps the 2nd option be my preference
  3. JimmyB

    JimmyB pfm Member

    You need one...
    337alant likes this.
  4. 337alant

    337alant Negatively Biased

    Will try and finalise this GB this week
  5. say it as it is

    say it as it is pfm Member

    ok put me down for option 2 then
  6. 337alant

    337alant Negatively Biased

    OK will do thanks
  7. bugbear

    bugbear pfm Member

    Can I be added, and put down for (preference) No 2 please?

    (and can I pick mine up direct ? - I'm only 6 miles away!!!)

  8. 337alant

    337alant Negatively Biased

    OK bugbear thanks will do and yes if you live local I can't see any reason why you couldn't pick it up ?
    I will speak to Stephen next week to see if he can deliver direct for everyone
  9. RonR

    RonR pfm Member

    Any chance of adding an 11th to the order? I see a Hackernap-type amp in my future...
  10. 337alant

    337alant Negatively Biased

    Hi Ron,
    No problem I will add you to the list and that makes 12 Transformers

  11. martin clark

    martin clark pinko bodger


    Sorry to be pain but a bit of play with the DPA case I had in mind with the PCBs was planning to use to build up as an off-board supply just isn't going to work.

    May I withdraw? Sorry to do this now, but hopefuly doesn't imperil the 10-offprice break. Apologies.
  12. 337alant

    337alant Negatively Biased

    I have spoken to Stephen today and he has accepted the additional 12v secondary and UK postage free of charge so the total price is £100 each
    I will pay him for the total amount up front.
    The order will take a couple of weeks to complete
    He will post the transformers out to you personally so I will need all of your addresses which I can submit with the order
  13. 337alant

    337alant Negatively Biased

    That's OK, thanks for letting me know

  14. bugbear

    bugbear pfm Member


  15. S-Man

    S-Man Kinkless Tetrode Admirer

    Option #1 preferred, but #2 is also fine.
    Good deal on the postage!!
  16. john.luckins

    john.luckins pfm Member

    I'm happy with either #1 or #2. Great value.

  17. say it as it is

    say it as it is pfm Member

    option 2 for me with my crappy 250v mains
  18. 337alant

    337alant Negatively Biased

    Hi John send me your address please on a PM
  19. chrisn

    chrisn pfm Member

    Hi Alan
    I am getting out of my depth here, I don't know what my mains is and I expect to use Vellemans for speaker protection. So I need a transformer to do solo stereo Hacker duties but also the facility to do stereo NCC200 220s too.
    On that basis maybe I need two!
  20. 337alant

    337alant Negatively Biased

    Chris this amplifier will supply power for a stereo Hackernap or stereo NCC-200, 220 or 300 amplifier
    Having 4 main secondary's
    The 2 x 42-0-42 can drive the front end of either the Hackernap or NCC-300 amp's directly
    or drive the NCC220 or 200 via a VBE or other symmetrical regulator.
    The other 2 x 35 - 0 - 35 will drive the output section of any of the amps above
    The 2 x 35 - 0 - 35 will also drive all stages of the NCC-200 &220 if the power supply rails are linked for the first stage, VAS and output
    If you use the Vellaman that takes a 230-250 mains directly so no need for the 0-12 secondary, if you use the UPC-1237 speaker protection you connect that to the 0-12VAC secondarys
    If you dont know what your mains is just use the 240 tapping you cant go wrong with that IMHO
    hope this helps
    Mike Hanson likes this.

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