So close

[wa2ise]

Originally Posted by ctc17

3.58 trap? You mean 4.5 trap?

Before you go twisting coils verify its not something in the house interfering with the set. printers, these new electronic ballasts etc can cause that.

Outside interference would create random patterns, but the sound carrier beating with the chroma subcarrier will produce the regular checkerboard beat pattern in the picture. Also you'll see more of it in parts of the picture that would have highly saturated color on a color TV set. The chroma subcarrier frequency was selected to be 227 1/2 cycles per line, and the sound carrier is 286 cycles per line. You should also see some variation of the beat pattern when the sound becomes active, vs periods of silence. So adjusting a sound carrier trap should help. This trap may also serve as the sound IF takeoff to feed the sound IF. If so, setting it right should also improve the sound.

[radio nut]

When I first got this set I ran it for days off of just changing electro's. Then its performance slowly started down hill and here I am. There was not any signs of interferance before.
I only have a digital volt/ohm meter and "sometimes" I can borrow a scope. Because of this even though some paper caps are in every part of this set I try to avoid adjustments if at all possible. I guess I am at the point where I will need to try and tweak some adjustments.

[radio nut]

Originally Posted by ctc17

3.58 trap? You mean 4.5 trap?

Before you go twisting coils verify its not something in the house interfering with the set. printers, these new electronic ballasts etc can cause that.

Leaky/bad phase diodes can cause the jittering and bars. Leakage in the yoke can cause the bars too.

Just because you changed the paper and electrolytics your not golden. I am seeing more and more leaky/shorted/lossy red and orange drops. The domino style mica. paper/mica are always bad where there is more than a few volts across them.

Just some notes to consider

ok, This set does not have any mica or red/orange drops left in it.
No mica's .....period...never had any. The red/orange I group together with paper mentally because I do not trust them and replace them all. I still have the resistors and one cap in the yoke assembly to check/replace.