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Sunking, everything works great, but I have a squeal with gain on zero!

Started by Cortexturizer, January 15, 2013, 10:53:34 AM

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Analog Design Audio

Hi guyw and have a happy new year , i built one of this pedal for a friend  and i have a very unusual problem , the pedal woks great on my hiwatt ( i used TL072CN ) but when my friend try to play it on his amps ( a marshall and a mesaboogie) the pedal works great when in buffer mode but when engaged it has a very big hum and noise when he just open a bit of the volume .

have any of you experianced any similar prolem ?

thank you very much

Ward

Quote from: carpediemgr on January 18, 2013, 09:19:43 PM
Hi guyw and have a happy new year , i built one of this pedal for a friend  and i have a very unusual problem , the pedal woks great on my hiwatt ( i used TL072CN ) but when my friend try to play it on his amps ( a marshall and a mesaboogie) the pedal works great when in buffer mode but when engaged it has a very big hum and noise when he just open a bit of the volume .

have any of you experianced any similar prolem ?

thank you very much
Is your friend powering the pedal with a wart different to how you power it? Some warts can induce a hum from hell. Try it with a battery if you haven't already, if you have, then I'm out.
You want HOW MUCH to fix it.