03-26-2013, 05:44 PM
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
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.
