Princeton Reverb sized power transformer with more than 100ma current?

Discussion in 'Shock Brother's DIY Amps' started by tubedood, Jun 6, 2021.

  1. tubedood

    tubedood Tele-Holic

    Age:
    56
    Posts:
    562
    Joined:
    Sep 25, 2018
    Location:
    Orlando
    Hi again!
    Needing to replace a 300-0-300 or (330-0-330) Weber W022772 100ma Princeton tranny that gave up the ghost.
    I'd like to up the current capacity on the HV to 144-175ma but I cant seem to find anything that will fit the cutout without cutting and drilling.
    Anyone come across such a transformer? I don't need the 5v taps as I am using SS rectifier.

    Tube complement is 3 12AX7's and 2 6V6GT.
     
  2. tubedood

    tubedood Tele-Holic

    Age:
    56
    Posts:
    562
    Joined:
    Sep 25, 2018
    Location:
    Orlando
    Looks like I found one! Amp Parts Direct... APD200H.
    310-0-310 @ 150mA
    6.3v @ 4.5A
    5v @2A

    Any others come to mind?
     
    King Fan likes this.
  3. 2L man

    2L man Tele-Holic

    Age:
    61
    Posts:
    891
    Joined:
    Nov 23, 2020
    Location:
    Finland
    If you change to a bridge rectifier you don't need a CT transformer and perhaps find it easier
     
    tubedood likes this.
  4. tubedood

    tubedood Tele-Holic

    Age:
    56
    Posts:
    562
    Joined:
    Sep 25, 2018
    Location:
    Orlando
    Good idea thank you!
     
  5. tubeToaster

    tubeToaster Tele-Meister

    Posts:
    145
    Joined:
    Nov 9, 2007
    Location:
    Brentwood,Tn.
    Hammond 290CAX has 115ma. A little better than stock.
    Allen Amps TP25H has 150ma but he is not selling transformers at the moment due to supply chain problems. You might check with him to see when he will start selling them again.
     
  6. monkeybanana

    monkeybanana Tele-Holic

    Posts:
    860
    Joined:
    Aug 6, 2016
    Location:
    mmhmm

    I emailed him a couple weeks ago and he said he doesn’t know when or if he will sell again due to losing two winders.
     
    Last edited: Jun 6, 2021
  7. schmee

    schmee Doctor of Teleocity Silver Supporter

    Posts:
    17,347
    Joined:
    Jun 2, 2003
    Location:
    northwest
    I used a Hammond Vibrolux tranny 325-325, plenty of power too. 125 ma. For some reason it was cheaper than a PR transformer from them... go figure...
     
    tubedood likes this.
  8. 72_Custom

    72_Custom Tele-Meister

    Posts:
    193
    Joined:
    Aug 11, 2007
    Location:
    Pittsburgh
    I recently stumbled upon the fact that a Hammond 272DX standup transformer will fit a typical Princeton/Champ PT cutout. 300-0-300 and 144mA. Mounting holes line up perfectly. The cable egress does come close to the edge of cutout, so they may pinch if one is not careful. A small nibble would help or a strategically placed rubber washer. But it can work without modification.
     
    tubedood likes this.
IMPORTANT: Treat everyone here with respect, no matter how difficult!
No sex, drug, political, religion or hate discussion permitted here.