It looks like it is not the first to employ AFC then.
I have not got anywhere with making the FM work, I injected a 10.7MHz signal modulated with a 1kHz tone into the RED test point. (eventually when I found it, because on this KB radio the test point was GREEN, it is red in the Regentone version)
There was very little signal received on the output, but the FM transformers did peak up, sort of just about.
When I switched to AM there was a very strong signal on the OP which I was able to find a small null for on L18, but the AM signal was still very strong on the OP. Maybe I need to test my old Advance SG63F on a known working radio.
I have been checking the voltages around the transistors, here are the results.
Do any of the voltages indicate they are sufficiently out to cause FM to not work. The voltages in red are my readings.
thanks
Mike
I have not got anywhere with making the FM work, I injected a 10.7MHz signal modulated with a 1kHz tone into the RED test point. (eventually when I found it, because on this KB radio the test point was GREEN, it is red in the Regentone version)
There was very little signal received on the output, but the FM transformers did peak up, sort of just about.
When I switched to AM there was a very strong signal on the OP which I was able to find a small null for on L18, but the AM signal was still very strong on the OP. Maybe I need to test my old Advance SG63F on a known working radio.
I have been checking the voltages around the transistors, here are the results.
Do any of the voltages indicate they are sufficiently out to cause FM to not work. The voltages in red are my readings.
thanks
Mike
