CTC-10 issue

[bigaudioal]

I have a recapped CTC-10 that looks really good. Makes a nice picture. However it has a waviness that seems to travel from bottom to top of picture with bottom and middle of picture pulling to the left and top to the right. Not very noticeable when showing a DVD movie or a picture from my agile modulator showing Verizon Fios, but I know it is there. However when hooking up a pattern generator or showing a cross hatch pattern via a DVD it is really noticeable. Almost like 60Hz getting through. It does it with all types of signal inputs. Set has all new filter caps and bypass caps. Any out of spec resistors have been replaced. All tubes are good.

I know bad filters letting 60Hz through can cause this condition. Can anything else cause this? Below pic showing DVD player menu shows the waviness.

[dtvmcdonald]

Stray magnetic fields

Heater-cathode leakage

[bigaudioal]

Originally Posted by dtvmcdonald

Stray magnetic fields

Heater-cathode leakage

I have tried different locations for the set so I doubt there are any stray magnetic fields affecting it.

Do you mean heater-cathode leakage on the CRT or somewhere else in the set? I was thinking horiz osc.

[nasadowsk]

H-k short in the crt. Didn’t they make isolating adaptors for that years ago?

[dtvmcdonald]

Originally Posted by bigaudioal

I have tried different locations for the set so I doubt there are any stray magnetic fields affecting it.

Do you mean heater-cathode leakage on the CRT or somewhere else in the set? I was thinking horiz osc.

I meant magnetic filelds from the power transformer.

H-K leakage could be lots of places not just in the horizontal ... it could
be video amp, sync separator, or even in the RF-IF chain.

I have even seen it happen because of a poor ground on the cable connecting
the DTV converter box to the RF modulator!

[Electronic M]

I'd reflow PCB grounds too. Those can cause various weird things like that.