Bias current?
I have decided to build a prototype with parts on hand, which are BF862, KSA992/KSC1845, FQP3P20/3N30. The only out-of-pocket cost is the PCB, sent out Monday morning.
@EUVL based on your experience with 3P20/3N30, would you recommend any change in bias current?
I have decided to build a prototype with parts on hand, which are BF862, KSA992/KSC1845, FQP3P20/3N30. The only out-of-pocket cost is the PCB, sent out Monday morning.
@EUVL based on your experience with 3P20/3N30, would you recommend any change in bias current?
No, but you should at least simulate first to check stability, etc.
The FQP output devices are quite different from the laterals.
Also different pin assignment.
See post #4 which compared the circuit of Ref. 7 (which is essentially what you plan to build) to the original Borbely.
Patrick
The FQP output devices are quite different from the laterals.
Also different pin assignment.
See post #4 which compared the circuit of Ref. 7 (which is essentially what you plan to build) to the original Borbely.
Patrick