Here's my Big Ear, a Spaceman WOW Signal, PCB from the amazing guys at Deadend FX.
It's up and running, sounding great, but I still need to do some fine tuning.
Q4 and Q5 aren't matched, I just had one of each left and none of them is within the recommended hFe specs (one too low, the other too high). I ordered more of those to see, if I could get a smoother gain.
Then, I need to try other stuff in C8 and R25. Currently, there a 2n poly in C8 and the stock 16k in R25. Thing is, on the more extreme depth setting of the switch, I get a nice stutter effect, when turning up the Depth knob until the signal cuts out completely. That's cool, but it happens to soon on the dial, so that the last third of the turn does nothing. I'm not too sure about all this yet, but I'll see what happens ...
Q6 seems to be fine, I have 5.22v on E. (It's a MP14B though, as my P416As were a bit low on hFe, in the 30ies IIRC, might still swap that too).
Anyway, here it is.
- moebius rules
- nogutsnoglory