03-07-2018, 12:15 PM
>How best to test the primary of the 2nd IF without disassembly?
You can measure the resistance from the + side of # 26 to the plate pin of the IF amp tube. Likewise you measure the resistance from 26 to the plate pin of the mixer too to check the 1st IF pri. Should be very low like 30 ohms or so. Would also check #12 it supplies the screen voltage to the mixer and IF tubes. Best guess is that you got a bad connection or broken wire from 26 over to the IF and mixer stages. I little odd to have more that one thing missing the HV when it's all fed from the same source.
You can measure the resistance from the + side of # 26 to the plate pin of the IF amp tube. Likewise you measure the resistance from 26 to the plate pin of the mixer too to check the 1st IF pri. Should be very low like 30 ohms or so. Would also check #12 it supplies the screen voltage to the mixer and IF tubes. Best guess is that you got a bad connection or broken wire from 26 over to the IF and mixer stages. I little odd to have more that one thing missing the HV when it's all fed from the same source.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Terry
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