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I'll try to explain this again the best way I can, of all the tube circuits in the TV, the IF is the MOST sensitive and hardest to deal with, and unlike most other areas, you can NOT measure voltages in the area with a normal digital meter, because as soon as you hook it up, it will alter the circuit and change what you are trying to read. You MUST use a VTVM, or a FET VOM, otherwise you will get false readings due to the added load from the meter in the circuit.
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