Schematic Elements for Guitar and Effects: Mu-Amps and the BSIAB 

Thank you for this very nice explanation of the circuit.

Very well done. I know this is super niche but thanks for taking the time to make these videos. This is what YT is best/made for!

I'm curious why R12 is such a low value. With C8, it does form a high pass filter around 88Hz, but it also is a much lower impedance than a JFET is capable, and will load down the output of the 2nd Mu amp stage, limiting its gain significantly more than the loading on the inputs of the two Mu amp stages. And also load down the input of Q3 more than it's capability. Similarly, Q3 stage will exhibit at least some gain to make up for those losses, plus the losses imparted by the tone control after. The ability of Q3 to efficiently drive the tone control is mitigated by the setting of the setting of the 100k drain trimpot, which will both determine the theoretical gain of Q3 stage, and its output impedance. Which could end up being higher than optimal. Depending on where the trimmer end up. Certainly the circuit is tested and performs well, but these appear to be curious and a kind of intentional throttling of some sort.

thank you for the help, i very much enjoy these videos . i remember the first time i bread boarded this circuit i was expecting the Jfets to sound something like a Wampler Plexi drive, and was very surprised when i first played my guitar through it , it sounded nothing like i thought it would it was way better sounding to me. that got me looking for any guitar FX circuit that uses stacked Mu-amps i ended up with a love for the DLS circuits by Catalinbread and was wishing i understood it a little bit more thank you for this video.

I’m sort of curious how you managed to learn all this stuff? I’m trying to learn pedals after learning how tube amps work and making several, but I’m finding small signal electronics WAY harder and more inventive.

SCIENTIFICGUITARIST, What the differences between MU Amp configuration compared to a Push Pull Configuration? the MU Amp doesn't have any crossover distortion, the MU amp are both conducting the positive and negative cycles at all times because there is no push pull turning on/off the FETS in an MU amplifier.

nat atbot GPT-3 [:|] "... thank you " [BEEP]