Philco 37-84--no sound

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Philco 37-84--no sound

Radioroslyn
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04-09-2012, 01:47 PM

(04-09-2012, 10:40 AM)sjhs1962 Wrote:
(04-08-2012, 10:43 PM)7estatdef Wrote:
(04-08-2012, 04:50 PM)sjhs1962 Wrote: I can't get a AF signal through the radio...even from the audio output stage. The output tube is a 6 K 6 and maybe is bad...no tester. I have recapped the bakelite in this stage but I have two more bakelites to do. E-caps done and resistors look good. Coils have be checked and 2 meg resistor put on the IF coil. Any thoughts?
The sensitivity control is crumbling...I think it is a dielectric cover on the adjustment screw, correct???

Time to start to check the voltages around the 6K6. Check pins 3,4,5,& 8. 3and 4 should have 275vdc or so. 5 should be at -15vdc or so. 8 should be at 0.
Terry

Terry: Pins 3 is 202 vdc and pin 4, 182 vdc, pin 5 is -.1vdc and pin 8 is 0. Does this seem to indicate bad 6K6? Thanks.

Ya got no grid bias, shorted cap on pin 5 or the center tap of the high voltage winding of the power transformer is grounded.
Terry

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Philco 37-84--no sound - by sjhs1962 - 04-08-2012, 04:50 PM

RE: Philco 37-84--no sound - by 7estatdef - 04-08-2012, 10:43 PM

RE: Philco 37-84--no sound - by sjhs1962 - 04-09-2012, 10:40 AM

RE: Philco 37-84--no sound - by 7estatdef - 04-09-2012, 01:47 PM

RE: Philco 37-84--no sound - by sjhs1962 - 04-16-2012, 05:32 PM

RE: Philco 37-84--no sound - by 7estatdef - 04-16-2012, 09:31 PM

RE: Philco 37-84--no sound - by sjhs1962 - 04-17-2012, 02:38 PM

RE: Philco 37-84--no sound - by codefox1 - 04-18-2012, 08:40 PM

RE: Philco 37-84--no sound - by morzh - 04-16-2012, 06:09 PM

RE: Philco 37-84--no sound - by 7estatdef - 04-18-2012, 08:36 AM

RE: Philco 37-84--no sound - by sjhs1962 - 04-18-2012, 02:11 PM

RE: Philco 37-84--no sound - by 7estatdef - 04-18-2012, 05:34 PM

RE: Philco 37-84--no sound - by 7estatdef - 04-19-2012, 04:49 PM

RE: Philco 37-84--no sound - by sjhs1962 - 04-21-2012, 01:18 PM

RE: Philco 37-84--no sound - by 7estatdef - 04-22-2012, 07:56 PM

RE: Philco 37-84--no sound - by sjhs1962 - 05-08-2012, 10:45 AM

RE: Philco 37-84--no sound - by codefox1 - 05-08-2012, 11:15 AM

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