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Thread: Looking for schematic for Fender Bantam AB763

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    Looking for schematic for Fender Bantam AB763

    V1 is a EF86

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    Supporting Member The Dude's Avatar
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    I could be wrong, but I know of no such thing (with EF86). It's been modified as the tube chart says, and possibly the EF86 is part of the modification. I've never seen such a thing stock, but maybe someone else has.

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    Supporting Member Jazz P Bass's Avatar
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    Funny how they throw around that 'AB763' moniker.

    EF86 tubes can be temperamental in a combo amp.
    They go micro phonic easily.

    Try to cut & paste the Vox 15 EF86 front end on to the 12AX7 schematic.

    Fender_bantam_bass_cfa7003.pdf
    AC 15.pdf

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    Supporting Member The Dude's Avatar
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    I'm just curious. Are there really only 3 preamp tubes (or 2 and the PI) like the tube chart shows? If so, I'm not sure why anyone would mod for a single pentode instead of a dual triode. Seems silly. Is it modded for a single channel amp and the tubes are cascaded? Is there evidence an extra socket was added? So many questions. I wonder if the tube chart is even original. Maybe a pic would help?

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    No way that tube chart is original.

    But would also like to say, an EF86 into an LTPI can sound quite good (& gnarly) if you bypass or dumb-down the tone stack & go for lots of gain... But yeah, I abandoned them because PITA tubes.

    Justin

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    Senior Member vintagekiki's Avatar
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    Quote Originally Posted by clintronics View Post
    V1 is a EF86
    If you do not represent too much effort, photo in detail preamp layout (part where the input tubes are)

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    Senior Member vintagekiki's Avatar
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    For each case, upload a photo in detail from the preamp layout, so be sure of about what is being done.

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    Quote Originally Posted by Jazz P Bass View Post
    Funny how they throw around that 'AB763' moniker.

    EF86 tubes can be temperamental in a combo amp.
    They go micro phonic easily.

    Try to cut & paste the Vox 15 EF86 front end on to the 12AX7 schematic.

    Fender_bantam_bass_cfa7003.pdf
    AC 15.pdf
    You nailed it, Thats exactly what the owner did. Sounds pretty good too.

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