Central Electronics 20A on the bench
The time has come for this 1954 Central Electronics 20A to spend some time on the repair bench. Central Electronics was a pioneer in commercial single sideband products, using the phasing method to generate SSB. The 20A is an SSB exciter (about 20W out) intended to drive a linear amplifier. These were quite popular back in the day, and there´s still a lot of them around. I wanted one to go with my Collins 75A4 and work some 15-20m ssb. This one I bought from from Denmark, I'm guessing it came to europe with someone at the US airforce; the manual has a handwritten adress leading to the US air force base at Ramstein, Germany. This transmitter needs some work before I can apply power to it. I usually start with having a good look at all the capacitors and resistors, and make a list of needed, obvious, replacements. All of the old 'sangamo' molded plastic caps will be replaced, the same goes for all the electrolytics. One potentiometer is also stuck and will probably...