CTC-5 21AXP22 convergence

[Kamakiri]

Nice!! Ever end up needing any of those coils?

[old_tv_nut]

Originally Posted by Kamakiri

Nice!! Ever end up needing any of those coils?

Well, I don't need them now, but good to have a backup, and the pots may still be useful.

[old_tv_nut]

Originally Posted by old_tv_nut

Well, I don't need them now, but good to have a backup, and the pots may still be useful.

A little expansion - I've been too busy/lazy to extract and open the pots, but still hoping they aren't burned like every other example I've seen. That 100 ohms tapped at 25/75 was just a bad idea for carbon pots.

[Penthode]

The static convergence pot elements appeared to have shrunk with age on my CTC5. This led to an open carbon element which resulted in intermittent static convergence problems. The shrinkage caused a crack in the carbon element at the rivet where the element was tapped. I ended up using a conductive paint normally used for repairing car window heating elements to bridge the gap on the carbon element.

The paint was applied four years ago and the pot is still fine.

[old_tv_nut]

Originally Posted by Penthode

The static convergence pot elements appeared to have shrunk with age on my CTC5. This led to an open carbon element which resulted in intermittent static convergence problems. The shrinkage caused a crack in the carbon element at the rivet where the element was tapped. I ended up using a conductive paint normally used for repairing car window heating elements to bridge the gap on the carbon element.

The paint was applied four years ago and the pot is still fine.

Wow, I never would have expected that's the problem. Thanks!

The proper setting on mine is very close to the tap, and that is the place that's broken. I thought it was due to burning the element.