07-16-2014, 02:27 PM
I have a RCA-68R3 Riders vol. 16 pages 39-43.
http://www.nostalgiaair.org/PagesByModel...015092.pdf
I have recapped and tested all the tubes, checked the resistors and replaced those over 20%. The AM plays fine the FM does not!
I have checked all the voltages which are on the prints and they are within 10-20%
I have checked all the coils for an open and they are as follows. Did not subtract for the leads and I was able to isolate at least one end.
T1 a&f .3 c&d .4
T2 a&f 10 c&d 11
T3 a&f .8 c&d 1.5
T4 a&f 11.8 c&d 8.8
T5 a&b .9 c&d .9
T6 d&e .6 d&f 1.1 e&f 1.1
While poking around with the voltmeter on V5 6ALS ratio detector pin7 & T6 e I get a couple of faint stations with the volt meter connected.
Now this radio does not have mica caps but small wax covered tubular caps should I go ahead and change them?
Looking for ideas on where to check next.
Thanks, Eric
http://www.nostalgiaair.org/PagesByModel...015092.pdf
I have recapped and tested all the tubes, checked the resistors and replaced those over 20%. The AM plays fine the FM does not!
I have checked all the voltages which are on the prints and they are within 10-20%
I have checked all the coils for an open and they are as follows. Did not subtract for the leads and I was able to isolate at least one end.
T1 a&f .3 c&d .4
T2 a&f 10 c&d 11
T3 a&f .8 c&d 1.5
T4 a&f 11.8 c&d 8.8
T5 a&b .9 c&d .9
T6 d&e .6 d&f 1.1 e&f 1.1
While poking around with the voltmeter on V5 6ALS ratio detector pin7 & T6 e I get a couple of faint stations with the volt meter connected.
Now this radio does not have mica caps but small wax covered tubular caps should I go ahead and change them?
Looking for ideas on where to check next.
Thanks, Eric
