I'm trying to find out the working voltage range of this preamp. The system I'd like to use it in is running on 27V.
The supply current available is 6A. The same supply is also powering a small spring reverb drive and recovery circuit (hence the 27V).Ok, how much supply current is available? What input signal and gain is it for?
The supply current available is 6A. The same supply is also powering a small spring reverb drive
and recovery circuit (hence the 27V).
Ok, try this for a 27V supply:
Base resistor to supply=100k
Base resistor to ground=10k
Decouple the circuit from the supply with 1k and 100uF/50V
If this does not give enough gain, bypass the emitter resistor with 100uF.
It is still a very poor solution compared to the decades old
two transistor solutions that are available with research.
If this does not work well enough, the current output drive capability can be increased. Let me know.
Just a couple of questions. Must the input cap be non polar? I have 10uf caps but they are polarized electrolytics.
Also, no mention of the output cap. Not needed in this instance?