This is an ultrasonic remote control chassis inside a 1961 RCA ctc-10
tv I'm restoring. This thing is working, sort of, seems weak, have to
put remote real close to the microphone on front of set for it to work
most of the functions. Hand unit has been recapped (a paper cap and
electrolytic) which made it work a lot better, as well as the 40mf and
5mf caps in the chassis. Moving the keyer tubes around can make one
function work better, another worse, or work, or not work, like the
functions are all borderline besides the tubes. Tubes test good. 1st
12ax7 is shielded.
Having trouble figuring out the voltages I'm measuring, mainly on left
of this diagram, 130 instead of 100, 61 instead of 165. I can't even
figure out why it SHOULD have 165 volts there, shouldn't the 2 megs of
resistance after the 175v shunt it down to about 60v I'm getting? I
changed c1001 with no effect. I am testing it on a bench with no mike
plugged in as per the schems, and just 120v going into the power
connector. Can anybody interpret these voltages and see anything that
sticks out like a sore thumb as to possible culprit? I just do not get
how that SHOULD be 165v at the mike plug, having trouble understanding
that, on top of the fact that I'm measuring only 61v.
thanks!


http://mysite.verizon.net/resoctff/s...techassis1.jpg