[R-390] J208/P108

dog agfa at hughes.net
Sat Mar 9 16:35:56 EST 2019


Since I repaired the filament circuit in the RF section from the short, 
now I seem to have lost the HV on V205 pin 6, the calib osc. I can see 
the HV at the switch pin 4 rear of S102 and I can trace it to a pin on 
P108 with the ohmmeter but it doesn't seem to be getting to the plate of 
V205. I'm assuming there's something wrong in J208/P108 or L211 and I'm 
trying to stick with the original stuff, but the pin outs in my Navships 
book looks nothing like the J208/P108 pin layout in my radios (both of 
them and they look the same). Were there different P and J items for 
those? I guess I'm going to have to pull out the RF section again to see 
what's going on with that, I already have the other radio nearly 
completely apart so I can compare. I know I didn't get the J208 back in 
the same orientation as originally, but that shouldn't make any diff 
since it looks like it can only plug in one way, and the filaments work 
as well as the RF section. I'm just curious, I'm sure I'll find the 
issue one way or the other, it's either a miswire or bad component. 
Luckily nothing is smoking, yet.

Dave N3DT



More information about the R-390 mailing list