SOLVED XB-MB (BB) Boost Hfe

[pcb rookie]

Doing the BB Booster. It calls for BC550. I have mesured some BC550B (280-430Hfe) and some BC550C (430-520Hfe). Any one as experienced different Hfe in this circuit? Is it worth socketing let’s say the 280’s against the 450´s or will it have no significant tonal effect in this circuit?

 

[Elijah-Baley]

Those transistor stages are just simple buffers, no gain. So I'd say that the Hfe are not so critical in this case.

 

[HamishR]

FWIW I used BC550Cs and the pedal sounds exactly how I would expect it to. I have a lot of BC550Cs.

 

[pcb rookie]

Great! this solves it! thanks or assisting!