[R-390] Smoke got out

dog agfa at hughes.net
Sun Aug 19 17:33:40 EDT 2018


I've replaced the RF section 6.3VAC wiring, including the 10uH choke on 
V205. I never did figure out what happened. I used an old transformer's 
6.3 winding to feed the Fluke AC Amp meter, to a 3A fuse and plugged it 
onto the J208-B and tested all the tubes I have individually in their 
respective sockets. Nothing strange found. Amps on the Fluke correspond 
to the correct draw for each tube with a short warm up. Both sets of tubes.

Also replaced the 6.3V harness wire from the IF connector to the RF 
section connector and re-tied the lacing which was burned. At this point 
I'm wondering since I pulled a lot of components off around V205 what I 
should check for before I sock the thing with HV and all. I'm sure it's 
all wired correctly, everything fit back like I can't remember as usual. 
I hate to pull the other one out just to compare. I used the schematic 
to find where each component went, I only pulled off one end of each 
component. I just want to be careful not to burn up something else. Any 
easy resistance checks I can make? I'm ready to put the RF section back 
in mechanically.

Dave N3DT



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