DUAL Mini-boosters

[Stephen]

 Why do everytime I do one of these they work great...Than I hook up the dpdt switch and they squel

I like the way they sing the note along........... but with the switch than hooked up dpdt, there is no turning up the volume...sheilded wire ...never used..never needed!!!

I have tried everything to make a stock dual booster not squel with a switch EVERYTHING!!   J201..MPF102...all do it ..IN FACT i HAVE SOME mpf102 THAT ARE EVERYTHING AS GOOD AS A j201..
   
Cheap switches?

Now I can hook up a single booster to just about anything..added to the end of a tube screamer WHOOOOAAAAA!!   Use it before a Llama LOOOOOK out!!!!  cant do two together

I like the mini booster circuit and use it with everything that I can think of  !!!!!!!  One thing is I use all.1uf values for everythung when I build them..

When i ground or cap things than the dynamics is not there  

STUCK

[Joe]

Two-stage circuits often oscillate with footswitches, because the output is non-inverted and the input/output leads on the footswitch are too close. Plus, JFETs are extremely sensitive. The solution is to use 3 stages, or use a good quality audio isolation transformer and flip the output leads before going to the footswitch, but that's expensive/hard to find. The 3rd stage doesn't have to be a minibooster, it can be a simple JFET stage designed for the lowest gain possible, so minimize the effect on sound.

[RedHouse]

Hook up the switch so the input gets grounded when in bypass mode, and use shielded wire.