630TS Lost the Vertical

[old_tv_nut]

I didn't understand what it was you disconnected in that video. I did intend for you to disconnect the antenna input, not the IF.

Anyway, I think the next thing I would try (after disconnecting and reconnecting the antenna) is removing/swapping the RF amplifier (V1).

[Crist Rigott]

Originally Posted by old_tv_nut

I didn't understand what it was you disconnected in that video. I did intend for you to disconnect the antenna input, not the IF.

Anyway, I think the next thing I would try (after disconnecting and reconnecting the antenna) is removing/swapping the RF amplifier (V1).

Yeah, I disconnected the ant lead to the 75/300 ohm adapter.
I swapped all 3 tubes in the tuner (6J6) with a good one from stock. Still no joy. I also subbed out the 6AU6 DC Restorer tube and that didn't help either.

[Penthode]

If the mica caps have been changed in the IF strip, the IF strip most certainly requires a proper sweep alignment. It looks like the alignment is truly and well out.

Proper alignment is not too huge a task. It just require a bit of knowledge, some patience and the pro power equipment. I learned to sweep align a TV if strip as a teenager more than 50 years ago and the knowledge once gained will remain useful.

[Crist Rigott]

I have a BK 1077B and injected video on the grid of the Video amp. Worked well. Then used the IF mode to inject a signal from each of the 4 IF stages. Same problem.
I'm suspecting the Video Detector circuits. It is a 6AL5. Is there anyway to use the 1077B to check this section out? The manual and Kiver's book seem to skip over this section of circuitry. BTW I substituted the tube with a another one that checked good. No joy.