[DaveWM]

check R43 monitor voltage at pin 3 of the syn sep tube 6AW8. sub that tube

sub the 6EA8 tube.



Try injecting a composite video signal at Test point C, you can use the video out of a DVD player.

try switching the normal and distance switch a few times, monitor the AGC voltage at test point A. You did replace C11 a .22 cap correct?
a long shot on that cap.


Try clamping the agc with neg 6v at test point B and neg 3v at test point A, you can use some dry cell batts for this if you dont have a variable supply.
again if AGC voltage is the problem


check the AFC diode with a diode checker (actually if you are losing vert as well this is prob not the problem).


spray the K6 with cool juice, actually do this 1st.