Ok. Let’s try this again…RCA 9TC240 Alignment

[Penthode]

Now you are making me confused.

The pot is adjusted for setting the -4.5v which is the AGC voltage measured at the junction of R135 and R136 wrt ground.

The RF CW signal is detected or rectified by the 2nd detector. You vary the 8601a signal until you get roughly 2 to 3 volts ACROSS the detector load resistor R119. The -4.5v should not be changing much: how much is it changing?