Zenith 25MC33 Set

[bhegges]

I decided to go with four 1watt resistors in parallel and series to get the right ratings.

Moving along my next issue is the sound, I get a fair bit of hum and periodic static & crackling. It does seem to be affected by the screen content. I have replaced the film capacitors and checked all of the resistors in the sound circuit, tubes are used but test good, and the pots were cleaned with deoxit. Next will be to probe around to see if there is anything that jumps out. Hoping for a dirty tuner, pot, or maybe connection somewhere, hopefully not an IF alignment issue.

Might try to inject composite audio at the grid of the 6BN6, I would think the noise is ahead of the 6BN6. May need to build a small amp to supply the proper signal amplitude.

Any advice or troubleshooting ideas would be welcome.