Admiral 14UY3C Sams 351-1

[Don Lindsly]

VT105:

Measure the control grid, pin 2 or 5. Should be around 130 volts.

Screen, pin 6 will measure about the same as the plate.

There are a couple of 1.5 meg resistors on the control grid that set the bias, which in turn sets the cathode voltage. If the audio transformer was open all along, that accounts for the low 130 volt supply. Recheck it now.

[vt105]

First a big thanks to Don Lindsly.

Changed R41, R42 1.3 Meg resistors on 12CU5 and bingo I was rewarded with a strong 130 volt supply. Re-connected tuner, brightness control, and IF board and now have a picture and audio. Brightness, focus, contrast, & vertical are stable, but has horizontal sync issues. All that for a couple of 5 cent resistors !

Next step is to recap the sweep/sync board

Hope to get some pictures posted when finished.
Bill