Mystery amp! Need help with ID please

Discussion in 'Amp Tech Center' started by Robster, Jun 19, 2021.

  1. Robster

    Robster Tele-Afflicted

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    A friend got two amps from a old repair guy for me to fix up, one a Supro 1606, the other one is the mystery amp...It has date codes from 1959, looks well made and runs a 5y3gt, 6v6gt, 6v6gt, 12ay7, 12a7y tubes. Has a service tag on the speaker from 1965, I think the speaker is not original. No idea who made this one. Has unique number plates under the controls which go all the way to 15!
    Anyone got a clue on this one? Thanks! IMG_1462.JPG IMG_1463.JPG
     

    Attached Files:

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  2. Jon Snell

    Jon Snell Tele-Holic

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    Looks like an Ampeg R12 or if it has a reverb tank an R12R.
    Has it got a 5Y3?
     
  3. Lynxtrap

    Lynxtrap Tele-Afflicted

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    Think so? The cab looks quite different from Ampegs I have seen, so does the inside of the chassis.
     
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  4. Peegoo

    Peegoo Poster Extraordinaire

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    If it were Ampeg it would have octal preamp tubes (6SN/J7). May be Silvertone or Danelectro.
     
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  5. Dacious

    Dacious Poster Extraordinaire

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    Or Airline maybe. Definitely dimestore but cool.
     
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  6. Peegoo

    Peegoo Poster Extraordinaire

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    What's the covering? Thick vinyl/Tolex with cloth backing, or a thin varnished paper?
     
  7. slider313

    slider313 Tele-Afflicted Silver Supporter

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    I'm going to guess it's any early Sano amp.

    What does the sticker say T-275?
     
  8. Robster

    Robster Tele-Afflicted

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    It uses a 5y3gt tube also. No reverb. It has a thin black tolex on it. It is not an Ampeg R12. Not Airline either.
    That color of fabric reminds me of the Alamo amps....Still wondering...
     
  9. telemnemonics

    telemnemonics Telefied Ad Free Member

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    Something from Chicago
     
  10. Robster

    Robster Tele-Afflicted

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    Slider that is the model of the output transformer made by "Olson T275"
     
  11. Peegoo

    Peegoo Poster Extraordinaire

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    Magnatones and Nobles had a slanted grill like that, but their chasses were not rectangular in cross-section like that one. The chicken-head knobs and radio rings under them makes this look like something low production or maybe a one-off. That center ring appears to be labeled REVERB but it's only REVE. What are the input jacks labeled?
     
  12. King Fan

    King Fan Poster Extraordinaire Ad Free Member

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    For those -- like me -- who were not quite clever enough to blow up this image:

    upload_2021-6-19_20-1-49.png

    And a zoom on the inputs...

    upload_2021-6-19_20-5-25.png
     
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  13. Robster

    Robster Tele-Afflicted

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    Yeah, that ring says REVERB but there is no reverb...
    Jacks are labeled 1,2,3 with MIKE over the 1.
    The labels look like very old water slide labels.
    The board is a turret board, not eyelet board...
    All components look vintage and untouched....
    Could this have been a kit build in 1959?
     
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  14. Robster

    Robster Tele-Afflicted

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    UPDATE! For some reason I thought this was from 1959, I think more like 1969. Definitely a 9 for the year on the transformer.
    I was looking for clues on the chassis but took another look at the cabinet. The cabinet has been extended on the back by a couple inches.
    Someone did a nice job of it. You can see the extra trim piece on the top and there are two holes on top to hold the original chassis in.
    The chassis in it only has one hole per side. This was done because the filter cap and trannies you cant see almost touch the baffle board.
    This looks like a Univox/Lafayette cabinet like the link I am posting:
    https://reverb.com/item/3440898-lafayette-univox-1966
    So, this is a DIY amp I bet someone did either in 1969 or later with all vintage parts...I can see no dates on the Ohmite pots...or output transformer.
    Think I will set this one aside while I concentrate on the Supro 1606 amp for now.
    IMG_1465.JPG IMG_1466.JPG
     
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  15. NTC

    NTC Tele-Holic

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    I was thinking homebrew-too weird for production. One of our forefathers.
     
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  16. telemnemonics

    telemnemonics Telefied Ad Free Member

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    Looking more like Heathkit leftovers now.
    Could still be Chicago too though.
    Aluminum chassis?
    Hobby build I bet.
     
  17. Viejo

    Viejo Tele-Afflicted Silver Supporter

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    I have worked on a couple of Lafayette LA-75s. If it is a Lafayette there will be many Japanese made components inside
     
  18. Robster

    Robster Tele-Afflicted

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    Ok, I decided to bite the bullet and power this one up. Has a nice sound with breakup at higher volumes.
    The two right knobs do nothing, Might have been for possible tremelo controls.
    The owner has decided its working well enough to sell as a working project.
    With that tube lineup it could be modded into a Princeton, tweed 5E3 amp or something else.
    Thanks for all the guesses, looks like we will never know what it was!
     
  19. David Barnett

    David Barnett Doctor of Teleocity Ad Free Member

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    The output transformer looks pretty fancy.
     
  20. rdjones

    rdjones Tele-Meister

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