Home Forums Vintage EHX V5 Op Amp – Can a Synthesizer Signal Break it?

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  • #86310

    Hello

    I recently experimented running a Synthesizer through my 70’s Big Muff V5 Op Amp.

    It sounded pretty cool

    but

    I noticed that afterwards, my guitar seemed to sound a little more different through it. Just a slight bit uglier than before.

    It could just be my imagination, but is it possible that the hot signal from the Synthesizer damaged the IC Chip Circuit?

    If not maybe I just need to re-string and adjust the guitar

    #126176
    Scruffie
    Member

    Potentially, depending on the output of the synth, yes it is a possibility to have damaged the input op amp.

    But it could just as easily be a psycho-acoustic situation, only time will probably tell.

    #126177

    Thanks. Is there any way to test for sure? With a multimeter?

    #126178
    Scruffie
    Member

    No, assuming it did anything (it probably didn’t) it would have broken down the input transistor of the op amp which wont have killed it but would lead to it get progressively noisier until it eventually died.

    The synth output would have to be very large to accomplish that.

    #126179

    Ah. I see. Yea it was an Oberheim Matrix 6 and then Ensoniq TS-12

    I may have gotten cocky and maxed out the volume knobs

    It does seem like their is more of a white noise type of fuzz now (like Jesus & Mary Chain) but again it could just be that I have the tone knob set higher than I used to and am not realizing it

    Thanks for the helpful input

    #126180
    Scruffie
    Member

    Sorry I can’t give a more definitive answer! Just one of ‘those’ problems. But if there is a more obvious problem down the line or after a while you decide it definitely doesn’t feel right, it’s a £0.25 chip and a 15 minute job to replace it. Can walk you through it as long as you’ve got a soldering iron.

    With a couple of diodes you can tack some protection on the back of the circuit board if you wanna do it safely in future too.

    #126184

    I would really appreciate that! I’ll let you know after A/Bing it with some old solo’d recordings to see if I can still get the same tones or not

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