Just picked up a rather clean AF-67 and Power Supply (caps all replaced in it !!).
As I figured, the 22.5 vdc Bias Battery is kaput (6.6 vdc).
Which would folks prefer, replace the Battery (~$25) or do the Zener in the
Cathode Mod. Is one better than the other ??
Tnx es 73, Dick, W1KSZ
Here is one possible solution for the bias supply;
Phil - AC0OB