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  • vintagekiki
    replied
    Originally posted by tbonuss
    #33
    Thanks VK. I don't see anything that looks at all like it, but I'll keep looking.
    Compared existing schematics i didn't notice anything like that. I'll keep still looking.
    Only found some substitutes for output transistors
    TI3031 (ADY25, ASZ15, AUY22111-28-34, MP1538, NKT406, SFT268, 2N1543-1906, 256341)
    40254 (AD162, AUY21, MP2060, NKT452, 2N1539-2133)

    1)
    http://web.archive.org/web/20200415110334/https://nvhrbiblio.nl/biblio/boek/14-2nd-Transistor-Equivalent.pdf
    14 - 2nd Transistor Equivalent.pdf
    2)
    https://www.alldatasheet.com/datasheet-pdf/pdf/1164052/ETC1/40022.html
    Last edited by vintagekiki; 07-08-2021, 05:44 AM. Reason: 2)

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  • tbonuss
    replied
    Thanks VK. I don't see anything that looks at all like it, but I'll keep looking.

    BTW: if anyone really wants this thing, let me know; I'm sure we can figure out a way to get it to you.
    '

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  • vintagekiki
    replied
    Unicord Power Plus 2X12 amp plus horn

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  • vintagekiki
    replied
    Links to Univox Unicord Westbury schematic

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  • galaxiex
    replied
    Originally posted by tbonuss View Post

    I'm pretty sure mine was a conversion. The drywall screws don't seem like something the OEM would have used .
    Did you make any kind of schematic?
    I did not make a schem for this one, tho I have traced and drawn many other vintage SS "cheap student" amps from the era.

    At the time, I got the amp repaired, so I thought I'd not have any real need for a schem.
    I could go back in, pull the boards and trace them to make a schem....
    ... and I probably will at some point...
    .... but right now I'm very busy with other "life stuff".... so it may be a while....

    Sorry...

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  • tbonuss
    replied
    You're welcome--do you want more pix? Or anything else?

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  • vintagekiki
    replied
    Originally posted by tbonuss
    Thank you.
    The photo you sent is enough to identify whether they are GE or Si transistors.
    RCA40329, RCA 2613, RCA 40254 are Germanium Transistors.
    This is a sufficient starting point, to try based on the internet schematics, to see if there is any similarity between Unicord and Unicord Power Plus.

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  • tbonuss
    replied
    Originally posted by bsco View Post

    Interesting read there Jazz.....
    Wow. This is really fascinating. Thank you for linking that!

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  • tbonuss
    replied
    Originally posted by galaxiex View Post
    Thanks!

    Interesting they used a smaller (shorter) reverb tank compared to my combo amp.
    Makes sense tho, there isn't enough room in the head for a full size tank.
    In mine the long tank is mounted vertically on the side wall of the cab.

    The reverb in mine is absolutely cavernous sounding!
    Really nice and almost rivals my Fender Deluxe Reverb.
    I'm pretty sure mine was a conversion. The drywall screws don't seem like something the OEM would have used .
    Did you make any kind of schematic?

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  • tbonuss
    replied
    Sure thing VK. Is this helpful, or do you literally just want a list?

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  • bsco
    replied
    Originally posted by Jazz P Bass View Post
    Unicord marketed Univox. (and USA Marshal)
    Interesting history: http://www.vintageunivox.com/history.html
    Interesting read there Jazz.....

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  • vintagekiki
    replied
    Originally posted by tbonuss
    Thank you!
    Nice photos

    One ask.
    I try to create some approximate idea of schematic based on photo layouts, using various sources where schematic are published..
    I ask both owners to write down how many and which transistors were used in the PCB preamp. A vertical PCB I assume is an board for effect (vibrato & reverb), and a small transformer is most likely for reverb.
    The JKE-2 is probably a tone color module similar to that used by the Ampeg.
    For the power plus Unicord series, I found no clues other than the catalog published by galaxiex, and concluded from the catalog that the Delta has 60W.
    Thanks
    vk

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  • galaxiex
    replied
    Thanks!

    Interesting they used a smaller (shorter) reverb tank compared to my combo amp.
    Makes sense tho, there isn't enough room in the head for a full size tank.
    In mine the long tank is mounted vertically on the side wall of the cab.

    The reverb in mine is absolutely cavernous sounding!
    Really nice and almost rivals my Fender Deluxe Reverb.

    Leave a comment:


  • tbonuss
    replied
    Sure.

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  • galaxiex
    replied
    Might be nice to see the guts of yours to see if the head and the combo are the same.
    I suspect they are but pics would be nice.
    Thanks!

    Leave a comment:

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