I've been blessed!

[ChrisW6ATV]

If you left the deflection and convergence yokes from the TV connected and hanging loose, but plugged the test jig's CRT and high-voltage connectors in, all you would get on the test jig is a bright spot in the middle of its screen if the TV chassis was at least partly working. That would tell you the chassis had high voltage, but almost no other help.

[jshorva65]

Originally Posted by ChrisW6ATV

If you left the deflection and convergence yokes from the TV connected and hanging loose, but plugged the test jig's CRT and high-voltage connectors in, all you would get on the test jig is a bright spot in the middle of its screen if the TV chassis was at least partly working. That would tell you the chassis had high voltage, but almost no other help.

It would also damage the CRT in your CK3000 by overheating and burning the phosphor in the center of the screen. Operating any CRT without deflection is a BAD idea. Even prolonged operation of a set which had full horizontal sweep but no vertical sweep would quickly burn a line across the face of the CRT, thus ruining the tube. Deflection is required not just to produce meaningful test results, but also to distribute the energy dissipation due to electron bombardment evenly over the entire screen surface to prevent damage to the phosphor from overheating.

[colorfixer]

A wirewound can pot create stray inductance in an AC circuit. This is probably why they used a carbon pot.

[ChrisW6ATV]

Originally Posted by jshorva65

It would also damage the CRT in your CK3000 by overheating and burning the phosphor in the center of the screen. Operating any CRT without deflection is a BAD idea.

Yes, I should have pointed that out as well. I don't know what I was thinking. DO NOT just hook up your chassis that way.

[Bill R]

Originally Posted by jshorva65

It would also damage the CRT in your CK3000 by overheating and burning the phosphor in the center of the screen. Operating any CRT without deflection is a BAD idea. Even prolonged operation of a set which had full horizontal sweep but no vertical sweep would quickly burn a line across the face of the CRT, thus ruining the tube. Deflection is required not just to produce meaningful test results, but also to distribute the energy dissipation due to electron bombardment evenly over the entire screen surface to prevent damage to the phosphor from overheating.

It must have been a bad day for posting. I know better. In retrospect I know you have to connect the deflection cable. Duh. Took a week of vacation and back now. Didn't realize how bad I needed that vacation.

Bill R