QuotingRubin -
You should not need to break the main coil circuit to measure the current - that may affect the stability of the circuit.
Look at the main drive circuit. You will find a resistor (usually several in parallel) that the current control circuit uses to establish the YIG current. Simply measure the current across that resistor.
Cheers!
Bruce
RubenRubio <rubenrb2019@...>:
toggle quoted message
Show quoted text
Ok, let¡¯s do a test set up for current measurements. My plan: separate the oscillator board and make jumpers between both with wire to open them and put the ammeter.
Bruce - I¡¯m measuring rf output directly from the YO, as you can see in the image.
8660 still waiting for pll alignment¡ coming soon
Askild - I will do heater, main coil and FET measurements. I need to be sure before tosh the YO¡
Yesterday I got a little frustrated after seeing that there was no rf signal. So I replaced the YIG oscillator with a sweep signal from my 8341A. This way it proves that the ALC, amps, mixer and multiplier work reasonably well. It's hard to match the SYTM and the 8341A, but after doing a lot of free run sweeps and recording the maximums in the 8566B, I was able to observe a flat and stable amplitude response in all four freq bands of the 83592A. So I can say that the ¡®frankenstein¡¯ plugin seems to work except for YO. At least a good new for me to continue the project ;)
Regards,
Ruben
