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My trouble is loss of EHT. I get a spark from
the anode of the EY51, but not from the cathode.
I tested the voltage across the heater of the EY51
and found it to be only .2 volts. The line output valve has been tested and found to be O.K.-
R. T. Pike (Cwmbran).
We advise you to check the EY51 heater with
the EHT lead disconnected from the tube. A
visual check is better than a meter which might read anything. The filament stfould glow a cherry red.
If removing the EHT lead does, in fact,
restore EHT suspect the tube for heater -cathode and grid- cathode shorts and see that the ion
trap magnet has not become displaced.

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