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Made sure all the rotary discs are firm on the shaft. Make a slight increase in the contact tension while the shaft is out.
Check for cold rivets on the discs. If the signal is better by touching the RF grid and bypassing the balun, then the balun is suspect. They were a common failure due to lightning and other stress. Look for an open resistor in the RF decoupling supply, usually around 1K to 2.2K. No plate voltage is a clue. The grid voltage divider resistors may go bad. Remove the tube and check values.
Check for proper voltages on the RF stage. Easily done with a socket extension or slightly rocking the tube to allow each pin to be tested.
Overall that TV is a hot performer and works much better than the E-Line 14 inch model.
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