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Old 09-10-2005, 14:23   #5
Join Date: Mar 2004
Location: Munich, Germany
Posts: 2,748

Here is the reverse-engineered circuit diagram of the amplifier at the base of the loop, as far as I have been able to determine it.
The transistor is most likely an n-channel FET, it could also be a MOSFET.

@ Carsten
Can you measure the range of V-tune and V+ against ground? The amplifier does not have to be connected during this measurement.

Update: I have updated the circuit diagram with a few more details and I have removed it here, see further down below for the new version!

dk8cb is offline   Reply With Quote