11-16-2013, 11:55 PM
More progress.
Forgot to mention I restuffed that plastic 'lytic. It looks for all the world like it grew that way. Wish the metal ones were so easy. Waste of a couple 500V 'lytics, though. It seems that the voltage across them is only about 26 volts.. cathode bypass caps for the 1st and 2nd AF amps.
Found my FM 1st secondary problem. Oddest thing. The 100pf (.0001) cap across the tuned part of the coil was errant. Luckily, I have a bunch of nice 100pf 1KV disc caps, and when I replaced that mica cap, I could actually peak the coil well within the range of the slug.
Also found why all my preset buttons quit working, and it had nothing to do with the other problem. Apparently, the bandwidth switch MUST BE on M(edium) in order for those buttons to work. I found that in the service literature while attempting to look for other things.
Can someone tell me, what IS that control accessible from the top of of the tuner chassis, in front of and to the right of (with the tuner facing you) the tuner? It's totally rusted so I can't just adjust it and see what it does, and there's nothing about it on the pictorials of the chassis'.
I contacted Norman over on the ARF, and he has the on/off solenoid in stock and bought it. Will be nice to not have to manually operate the actuator to turn the set on and off.
Forgot to mention I restuffed that plastic 'lytic. It looks for all the world like it grew that way. Wish the metal ones were so easy. Waste of a couple 500V 'lytics, though. It seems that the voltage across them is only about 26 volts.. cathode bypass caps for the 1st and 2nd AF amps.
Found my FM 1st secondary problem. Oddest thing. The 100pf (.0001) cap across the tuned part of the coil was errant. Luckily, I have a bunch of nice 100pf 1KV disc caps, and when I replaced that mica cap, I could actually peak the coil well within the range of the slug.
Also found why all my preset buttons quit working, and it had nothing to do with the other problem. Apparently, the bandwidth switch MUST BE on M(edium) in order for those buttons to work. I found that in the service literature while attempting to look for other things.
Can someone tell me, what IS that control accessible from the top of of the tuner chassis, in front of and to the right of (with the tuner facing you) the tuner? It's totally rusted so I can't just adjust it and see what it does, and there's nothing about it on the pictorials of the chassis'.
I contacted Norman over on the ARF, and he has the on/off solenoid in stock and bought it. Will be nice to not have to manually operate the actuator to turn the set on and off.
