Possible to toggle Q1&Q2, Q3&Q4 in BSIAB?

[pappasmurfsharem]

I'm wanting to have a toggle switch on the Q1,Q2 section and another for the Q3,Q4 section of the BSIAB to swap between Transistor JFET pairs.

I assume something like a 6PDT would work but that doesn't seem easily available.

[Kesh]

You can leave all the emitters connected. So 4PDT

[pappasmurfsharem]

You can leave all the emitters connected. So 4PDT

I just looked up and saw somewhere that source and emitter are "the same" So would this on a separate board work?



The transistors are mislabeled Q2a and Q1b should be swapped

[Kesh]

Oh JFETs. You can have source or drain as the one that stays connected. Probably gate too. On many JFETS source and drain are interchangeable. Personally I would keep whichever one is going to ground as the one where both stay connected. Probably won't matter though.

Your arrangement is basically right.

[pappasmurfsharem]

Oh JFETs. You can have source or drain as the one that stays connected. Probably gate too. On many JFETS source and drain are interchangeable. Personally I would keep whichever one is going to ground as the one where both stay connected. Probably won't matter though.

Your arrangement is basically right.

Yes JFETS sorry about that. I would probably use the GGG Schematic for BSIAB

I've heard of good results for MPF102 for Q1,Q2 & Q3,Q4 to give it a more plexi like sound vs stock 2N5457's (Q1,Q2) and J201's (Q3,Q4).

Would there be any benefit of using two DPDTs for each pair to mix and match the sounds?

Nevermind. I just realized that I am incompetent and I have to have 4PDT for each section anyway.