Duncan's 1960 Magnavox

[Mr.Duncan]

Originally Posted by Electronic M

Those voltages are completely normal. With line voltage set to the same 117V as Sam's anything within +/-25% is normal (in stages like vertical or CRT gun grid/cathode where the bias is controlled by potentiometers the normal range can be much larger than 25% and it's sometimes wise to adjust the relevant pots to make sure they can get the voltage that sam's says should be there.

If all the vertical voltages measure normal you may want to check the output transformer, and yoke and their connections to each other.

I'll check those tonight. I did find a low voltage PIN#7 of the 6BF6 tube.
(Vert Mult / AGC clamper)

I believe pin#7 is the output that feeds into 6DT5 Tube?

I was able to vary the voltage of pin#7 between 7.47 to 11v, but no higher than 11. (using the vertical adjustment pot)

Voltage spec: 25v
Reading: 7.47-to-11v

Some good news:
Im getting clear audio out from the TV- was broadcasting signal on channel #7 with my Blonder Tongue.

Checked the Yoke- Ohm reads are within spec.

tube by Thomas Duncan, on Flickr