:-)
Yes, there's a JFET on the other side. So far a BF245A.
It works well. But the circuit consumes 3.5 mA. I thought it could be
less. It is running at 5V DC and the xtal frequency is 1.8432 MHz.
I looked for 74HC40.. devices but they seem to consume even a bit more.
Circuit attached.
For a home operated RX i would not care about the power consumption in
certain ranges but here, for the solar operated system i want to save
any mA. But i think i have to be happy with the result.
So far, the complete RX, i.e. 2 mixers, LO and a LM2936 consumes 8 mA!
I hope that the gain of the SA612 will suffer...
73, Stefan
Am 15.07.2015 07:37, schrieb Andy Talbot:
OK, I'm all confused now.
The [HEF] 4013 is a dual Flip-Flop; how have you made it oscill
with a crystal ?
(Or have you hidden something under the board)
Andy G4JNT
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