Author Topic: Dual boost strange behavior  (Read 182 times)

rankot

Dual boost strange behavior
« on: February 13, 2021, 05:18:57 PM »
Just finished dual boost pedal - one half is Zazen Boost by Andy, another half is old-fashioned JFET boost. I put a switch, so I can pick which one is making output, and they both share the same input circuitry. dDRIVE pot affects only JFET boost, but when I switch to that one, rotating zGAIN pot also affects tone slightly, although output of Zazen Boost is disconnected (see schematic). I can't figure out why does this happen???


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iainpunk

Re: Dual boost strange behavior
« Reply #1 on: February 13, 2021, 06:40:25 PM »
it might be wise to also disable any interaction going in to the inactive circuit with a DPDT selector switch, instead of SPDT.

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rankot

Re: Dual boost strange behavior
« Reply #2 on: February 14, 2021, 06:05:21 AM »
You are right, I'll try that, too.
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