Home › Forums › Vintage EHX › Need help identifying my Bass Micro Synth

Viewing 7 posts - 1 through 7 (of 7 total)
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  • August 24, 2016 at 5:19 am #84552
    airesoyaire
    Participant

    No serial number and can’t seem to find information regarding this sweet pedal other than this is not the first issue beacuse of the AC adaptor. Can somebody please help me identify the year it was made? The back has a black cover and a little hole where you can access the trim pot, nothing more.

    August 24, 2016 at 11:37 am #121886
    Scruffie
    Member

    Can’t tell anything from the outside, have a look inside for a date on the PCB or failing that, the codes off one of the slide pots.

    August 24, 2016 at 3:35 pm #121887
    airesoyaire
    Participant

    Thank you, Scruffie. I think I found a serial number printed on the board. It reads PC7901-2C. I googled the “code” and I did find some threads regarding EHX but none cleared my doubt. Do you know what it means?

    I couldn’t find any information engraved on the slide pots.

    P.S. The pic of the board is taken from another site but mine reads exactly the same.

    August 24, 2016 at 8:17 pm #121889
    rafmax
    Member

    1996 ?
    found this schematic via effectsdatabase :-)
    http://files.effectsdatabase.com/docs/schematics/eh_bassmicrosynth.pdf

    August 25, 2016 at 11:47 am #121893
    Scruffie
    Member

    I think you’ll find PC7901-2C is a revision reference number rather than a date code, you’ll have to look at the other PCB or the pots to get an idea as I said.

    Raf I think that’s someones personal redraw of the vintage schematic, my factory one has a ’98 copyright on it so it could be from then until when they switched to the xo.

    August 25, 2016 at 11:56 am #121894
    rafmax
    Member

    Got it Scruffie ;-)

    August 25, 2016 at 9:17 pm #121897
    airesoyaire
    Participant

    Thank you both, Rafmax and Scruffie. It seems it is a late 90’s issue. Have a nice day!

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