|
Well, I'm no expert at these things, seeing as how a defective damper tube led me on a wild goose chase through the innards of the Admiral in a recent thread, but here goes:
1. Do you have drive at the grid of the horizontal output tube? You can check with a meter or a scope; you should see maybe -10 to -20 volts at the grid, or a somewhat sawtooth/square wave combination on the scope.
2. Check the plate cap of the HO tube by holding a neon test light close to the insulated plate lead. If it lights, AC is being produced at the flyback primary.
3. Do you have any cathode current on the HO tube?
Hope this helps; maybe someone else has some ideas.
Jim
|