Aleph J Schematic

Official Court Jester
Joined 2003
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Blues said:
Choky, did you think I missed it...?

Mr. Pass,

Aside from the jfet diff input with bjt ccs, looking at the output ccs...is R27 really between C and B of the voltage reference npn transistor (Q4)? Thanks for posting the circuit.


hehehe

R27.........

that really doesn't matter

C2 is pretty good decouple even across R26
 

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First to say: Thanks a lot, Nelson! :up: :up: :up:

After a quick look 2 questions raised:

Which type of 2SJ109 is the right one. With a current of 4 - 4.5 mA running through each of the FETs, the GR type seems to be inappropriate. BL and V should work in principle, but I lack the experience to decide which one would be the better choice.

Maybe not so important, but the current through LED1 seems to be very low.

Greetings,
Chris