Quote:
Originally Posted by Kevin Kuehn
No the tubes definitely need to be installed, so I suppose that's going to be difficult unless you have one of the test socket adapters. You might be able to push the pins only partially in the socket and probe the sides of them. Maybe Old Coot will have a better idea on where to go next. I was going to suggest that you check for change in AGC voltage when you connect your signal source to the antenna input vs no signal, if so that would indicate that signal is getting though the tuner and video IF and at least as far as the detector. AGC voltage should go more negative with stronger signal. Great to hear the HV rectifier solved your brightness issue.  |
Well its kind of hard to access the tube sockets for the tuner from below because of how the tuner is setup.
and unfortunately I don't have test sockets.
I guess I could try the partially installing the tubes into the socket and probing the tubes for voltages that way.
I just now read your comment about the tubes needing to be in the socket for the voltage readings so disregard the voltage measurements I gave, because those were taken with the tubes out of the socket.