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38-116 died the 3rd time! Guidance Please?
#18

As I promised in the revised title it's down again. I'm keeping this with the original thread. Worked for a while after the changing the cadohm out and slowly volume dropped to virtually nothing. Here is where I'm at. Great hum on the finger test, amp section seems fine. Ran a modulated RF signal into the antenna and chased it down the radio and all great until I hit the second detector 6K7G. Signal on the G1 strong, signal on G2/G3 nothing. Tube tests strong on my Precision 912.
Off for voltages:
Plate 35V
G1/G2 18V
Cathode 0 Grounded
Where is my plate voltage? Not certain what it should be but not that.
Resistance time:
Plate to ground 4K Seems right looking at the schematic
Measured R69 and R66, on the money, total of 16K

Any help would be appreciated, this radio has been a pest.
Schematic link"

Jerry
http://www.nostalgiaair.org/PagesByModel...013235.pdf

A friend in need is a pest!  Bill Slee ca 1970.


Messages In This Thread
RE: 38-116 died! - by 7estatdef - 03-15-2013, 10:13 PM
RE: 38-116 died! - by BrendaAnnD - 03-15-2013, 10:23 PM
RE: 38-116 died! - by jerryhawthorne - 03-15-2013, 10:29 PM
RE: 38-116 died! - by jerryhawthorne - 03-16-2013, 08:59 PM
RE: 38-116 died! - by jerryhawthorne - 03-17-2013, 05:51 PM
RE: 38-116 died! - by morzh - 03-17-2013, 07:57 PM
RE: 38-116 died! - by jerryhawthorne - 03-17-2013, 08:28 PM
RE: 38-116 died! - by morzh - 03-17-2013, 09:07 PM
RE: 38-116 died! - by jerryhawthorne - 03-17-2013, 09:09 PM
RE: 38-116 died! - by morzh - 03-17-2013, 09:14 PM
RE: 38-116 died! - by jerryhawthorne - 03-17-2013, 09:45 PM
RE: 38-116 died! - by morzh - 03-17-2013, 10:00 PM
RE: 38-116 died! - by morzh - 03-17-2013, 10:12 PM
RE: 38-116 died! - by jerryhawthorne - 03-17-2013, 11:05 PM
RE: 38-116 died! - by morzh - 03-18-2013, 09:36 AM
RE: 38-116 died! - by jerryhawthorne - 03-18-2013, 02:35 PM
RE: 38-116 died! Oh no, died again. Help - by jerryhawthorne - 03-26-2013, 06:44 PM



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