LowB+ in a CBS Ch 817-6

[Kevin Kuehn]

Unfortunately my Sams have a hole from 153 to about 250. Right where all the fun early 50's sets are.

Reading back through the replies it almost sounds like your red and blue yoke wires are reversed, but I'm not able to see if or how that's possibly loading down the B+. What would happen if you pull both the horizontal and vertical output tubes so you can measure only the dc voltage drops across the yoke windings? Have you verified those two windings are not shorting to each other?

[Doug66]

Hey Guys,
Sorry to be so long on getting back with me response.
Kevin, I just checked the replacement yoke I put in against the original yoke (which was good) and it is hooked up right.

I'm somewhat confused on what you mean be checking across the woke windings. I unplugged the vert and horiz output tubes. On each yoke lead I got about 340V. Putting the meter leads directly across the yoke leads reads nothing.

I finally got a pic of the screen with a signal applied. Compressed on left and wavy, and vert lacks height. Brightness is at max. Also can't get a good lock on vertical. Assume this is all due to the B+ being too low.

[Kevin Kuehn]

Originally Posted by Doug66

I'm somewhat confused on what you mean be checking across the woke windings. I unplugged the vert and horiz output tubes. On each yoke lead I got about 340V. Putting the meter leads directly across the yoke leads reads nothing.

I thought if there was any DC voltage drop across one of those that it might lead to where the short was, giving some sense of direction. The picture looks like horizontal ringing, like the damper is not doing it's job, or possibly the horizontal output being overdrive.