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Eico HF. Will a power trans. from a HF-20 amp work on a HF-22?

Discussion in 'Tube Audio' started by buickguy62, Apr 15, 2018.

  1. buickguy62

    buickguy62 Active Member

    Messages:
    224
    Can I use a power transformer from a HF-20 integrated amp as a replacement on the HF-22 power amp?
    Thanks in advance,
    Tom
     

     

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  2. soundmotor

    soundmotor super modified Subscriber

    They are pretty close but you will need the SAMS to see how close.
     
  3. dcgillespie

    dcgillespie Fisher SA-100 Clone Subscriber

    Messages:
    9,765
    Location:
    Ball Ground, GA
    The power transformer between these two models are one and the same, even right down to the Eico part number, so swap away!

    Dave
     
  4. buickguy62

    buickguy62 Active Member

    Messages:
    224
    Great, thanks!!!!
     
  5. Ohighway

    Ohighway Wannabe Minimalist Subscriber

    IIRC the OPT is the same between the two also.
     
  6. soundmotor

    soundmotor super modified Subscriber

    OK, I thought they were as well, knew the outputs were the same. Then hecked the schematics and saw minor diffs in PT sec resistance & voltages. They look like SAMS schematics too, what gives?

    HF-22

    http://www.freeinfosociety.com/electronics/schemview.php?id=2340

    HF-20

    http://www.freeinfosociety.com/electronics/schemview.php?id=2339
     

     

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  7. drtool

    drtool It might get loud In Houston Subscriber

    Messages:
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    Make sure the owner b4 you did not swap out xformer. Links did not work for me Soundmotor.
     
  8. multichamp12

    multichamp12 AK Subscriber Subscriber

    Messages:
    550
    I do not always trust the sams manuals. Try to find the original Eico manuals. But as Dave said, you will be fine as they are the same transformers (as long as they are the actual originals)
     
  9. soundmotor

    soundmotor super modified Subscriber

    Are you using Chrome by any chance? They work for Explorer & Firefox.
     
  10. drtool

    drtool It might get loud In Houston Subscriber

    Messages:
    2,204
    Location:
    Houston Texas
    Chrome.
     
  11. soundmotor

    soundmotor super modified Subscriber

    I switched to Firefox last month and uninstalled Chrome. It would not display many links and I gave up trying to figure it out. On latest Windows 10 update.
     

     

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  12. drtool

    drtool It might get loud In Houston Subscriber

    Messages:
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    Location:
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    Thanks Soundmotor.
     
    soundmotor likes this.
  13. GordonW

    GordonW Speakerfixer Subscriber

    Messages:
    17,901
    Location:
    Marietta/Moultrie GA USA
    Correct.

    Regards,
    Gordon.
     

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