Recent content by hamerfan

Check the values of r6 and r7, if they are right take a lower r6. BTW the NPN should have a positive voltage.

yeah its a mixture of PNP and NPN transistors which makes me think of a problem of the pinouts

Mine works great, maybe on a strat it is a bit trebly with a MP38a of hfe 62. What your favourite hfe for this application?

Faulty silicon trans? Did you check it with a Tester?

Low leakage only on the first transistor necessary. The second transistor with the higher hfe has often more leakage by nature.

I am not in position to explain everything, but i found the circuit analysis of electrosmash useful to understand the basics. https://www.electrosmash.com/big-muff-pi-analysis I also saw some vids of Brian Wampler on this topic.

If you have a spare 1044, try that one first.

Thanks, i‘ll give it a try.

A foot switch crapped out on me. I cut the breakout board/switch out. I think of saving the breakout board by desoldering it with my hot air gun. Does that work? At what temperature?

I saw some mods like these on a Joyo Ultimate Drive, which is a close copy. Look here: https://www.tdpri.com/threads/can-i-mod-a-joyo-ultimate-drive-it-drives-me-crazy.1091708/

The third non DIY pedal i bought was the Cmatmods Brownie. The builder gave up his business, when a flood hit his house and destroyed his lab and all his parts‘n‘bits. The Brownie is basically a BSIAB2 and he gave a pair of J201, 2N5457 and MPSA12 with the pedal to swap in the first stage. I...

Something like that? https://www.pedalpcb.com/product/pcb702/

What about a MIAB? I recommend the Ultisol - winner of the Anderton's Blindfold Shootout.

The Lumbergs are a bit spendy. I bought a pack of Lumberg copies from Ebay. Good experiences so far.

What comes next? Carving a transistor out of a solid lump of Germanium?