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94 Twin Amp reverb pan suggestions

Discussion in 'Amp Tech Center' started by avspecialist, Oct 28, 2020.

  1. avspecialist

    avspecialist Tele-Meister

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    I have a 94 twin amp, the one with 2 inputs and no tremolo. This model is confusing, since there are several iterations of this amp. I'm presently trying the standard Fender reverb pan the 4AB3C1b. it seems to work ok, but the sound is different, good reverb but fast decay. When used in my 74 silver faced twin it sound just right, it has a much nicer reverb and decay. The Part number in the service manual for the 94 Twin Amp shows P/N 064063. I made a few calls on this part number, but no one was sure which pan I'm looking for any ideas, thanks in advance.

    [​IMG]
     
  2. 24 track

    24 track Doctor of Teleocity Silver Supporter

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    hope this can help you , I typed into the search window " Fender Amp Part # 064063 "
    this was my first hit

    Nov 24, 2016 — Fender part number: 064063. Accutronics part number:4AB3C1B Fender Reverb Cable for DRRI Fender part number: 0025722000. Also, any ...
     
  3. avspecialist

    avspecialist Tele-Meister

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    Thank you 24 track for looking. Funny I did that also and got nothing. I'm using that pan presently, its kind of dry in that amp. I wonder if there is another substitute for something with a longer decay and reverb. I didn't really want to get into moding the existing circuit since its a PC board. thanks Again for the info
     
  4. schmee

    schmee Doctor of Teleocity Silver Supporter

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    Well, you have the long decay tank I guess. Are you sure the 064063 is the original tank for that amp? IF so, you could try the 3 spring version. Does your Twin have normal reverb or some digital hybrid type? Was it ever better?

    DIGIT #1 - REVERB TYPE

    8 = short tank, three springs
    4 = long tank, two springs
    9 = long tank, three springs

    DIGIT #2 - INPUT IMPEDANCE
    A = 8 Ohm

    B = 150 Ohm
    C = 200 Ohm
    D = 250 Ohm
    E = 600 Ohm
    F = 1475 Ohm

    DIGIT #3 - OUTPUT IMPEDANCE
    A = 500 Ohm
    B = 2250 Ohm
    C = 10000 Ohm

    DIGIT #4 - DECAY TIME
    1 = Short (1.2 to 2.0 sec)
    2 = Medium (1.75 to 3.0 sec)
    3 = Long (2.75 to 4.0 sec)
     
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  5. Bill Moore

    Bill Moore Tele-Afflicted Silver Supporter

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    Silly, but Fender #'s leave off the first, and the last 3 zeros. Hence 006-4063-000 is the full number.
     
  6. avspecialist

    avspecialist Tele-Meister

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    Hi schmee: I reinstalled the 4AB3C1B back in my silver face Twin Reverb and the pan sounds very good. I'll have to try some different tubes to see if that makes a difference. My Guess its probably the circuit design of that amp. That part I'll really have to look into, since its a PC board design. I'm not looking forward trying to disassemble. I might just order a 9A3B MOD tank to try, my cost is about $ 18.00.
     
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  7. schmee

    schmee Doctor of Teleocity Silver Supporter

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    Yeah, I had a Red Knob Twin with circuit boards. They are not that difficult to work on, at least not as bad as many SS amps. I haven't really looked at the layout on that amp, probably just a schem is available.
     
  8. avspecialist

    avspecialist Tele-Meister

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    Schmee, its similar to the red know, its referred to as the 94 twin amp, several iterations, min has to input jacks and no tremolo.

    [​IMG]
     
  9. avspecialist

    avspecialist Tele-Meister

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    Hi Schmee: Do you think this will work in place of the 4AB3C1B: 8 ohm in and 2250 out
    • Replaces: 9AB3C1B
    • Solid, sturdy construction
    • Type: Long (3 Spring) tank
    • Decay: long decay
    • Input: 10 Ω
    • Output: 2,575 Ω
    • Connectors: Input insulated/output grounded
    Thanks for your advice, Bob

     
  10. schmee

    schmee Doctor of Teleocity Silver Supporter

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    I'm not the most knowledgeable guy on this, but I suspect it's close enough to work.
     
  11. avspecialist

    avspecialist Tele-Meister

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