I am restoring a TR4CW and have it working except for the AGC. I have swapped out all of the tubes but I still don't have any AGC action. While the S-meter does indicate signal strength there is no delay in the movement. I have measured the voltage and resistance on the 12AX7 AGC tube with the following results:
PIN VDC 1 -.1 2 -51 3 -49 4 0 5 0 6 +1.17 (should be -0.16) 7 -51 8 -49 9 6.3 (fil) Pin 6 which is the plate of the 12AX7 measured 1.2M to ground but should be 2.2M according to the manual that I downloaded from the internet. My schematic copy is not too clear given it's all on one page in the download. It appears that pin 6 goes through 3 resistors in route to a -60V source but I can't find that source on my schematic. Can someone telll me where to find the source of the -60V feeding pin 6 of the 12AX7? Thanks & 73' to the group Jerry K4FJK 2 3 4 5 6 7 8 9
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