10-03-2019, 09:06 PM
I think it is a cathode follower to the voltage created by the 620k/510k resistive divider of the plate voltage to be used as the SG voltage for 6550. Supposedly the follower will stabilize it better due to low output impedance compared to the divider itself.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.