Quote:
Originally Posted by Zenith6S321
Any chance the HOT grid coupling capacitor might be leaky, raising the grid voltage?
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That was the first thing I replaced.
Wayne stopped by tonight, so we had some fun. First we used the HV probe, which revealed a perfectly healthy 24.5kv. The set makes a nice picture when driving a composite signal directly into the video tube, but going through the tuner/IF produces snow. There's still some kind of load on one of the B++ lines, it's still measuring 40 odd volts low. We tested all the tubes I haven't already subbed, no surprise we didn't find a single one bad.
This thing is kicking everyone's ass all over the place, we just can't figure out why it's doing this. I have my suspicions about a leaky cap still, but the only thing I have left as far as troubleshooting is a shotgun recap of the leftover micas.
CT-100: is there any way you can give me a current reading from both legs coming out of the ballast tube? Just insert the meter between pins 2 and 3 on the ballast and let me know what you find. At this point I have nothing else to go on.