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So I got home from work after being gone for 4 days. Got to do some troubleshooting on the Philco. I did a resistance test of the IF tube pins and my 6U8 Sync tube. Nothing was too far off.
Something that did correct my voltages is very unusual to me. I've been picking up FM stations... that's not the point though.... When I put my voltmeter on pin 5(plate) of the v5 6CB6t 3rd IF tube the sound cuts out and voltmeter shows 115 volts. I took another voltmeter to pin 6 at the same time and the voltage was spot on 115 volts. Like it should. I removed the voltmeter off pin 5 and the voltage on pin 6 shot up to 170.
If I hold the voltmeter on pin 5 on v5 and check other voltages on the other IF tubes including the 130B+ source it actually shows around 134..
40 volts less only when I hold the meter to plate. Remove the voltmeter and check voltages... up 40 to 170V. I did the same voltmeter test on the on the 2nd IF stage and got the same results and voltages for the b+ and other tubes.
It was not the same case when I put the meter on pin 5 of the 1st IF stage. Voltages were still wonky.
my lack of electronic knowledge leaves me baffled at this time. The resistance checks on pins 5 and 6(screen and plate) for all 3 IF tubes were correct. I show no open coils or transformers connected to the IF sections.....
I'm hoping that this TV will be finished soon.. Its been tough TV. I have 9 other TV's that all worked after a complete recap and some resisitors. This one has been a real pain....
Thanks for the help!
Matt Davala --Beaverton, Or
Last edited by Davala; 10-14-2014 at 07:45 PM.
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