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Help! Why is the EHT voltage so low?

April 26, 2017eht help low voltage

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Help! Why is the EHT voltage so low?

1 Answer

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Possible causes include: Faulty EHT block, low mains supply voltages, faulty mains transformer, ‘leaky’ panel(s). Turn the speaker off, and disconnect (de-solder) both panel lines from the EHT supply. The thick and thin red wires together on the left hand side of the EHT as viewed from the rear. If the voltage now comes up to specifications, then you have a leaky panel, somewhere. If the voltages are still low, then you have a mains transformer fault, or a low mains supply condition. See the Fixit Section of this site, for information on repairing the panels, fixing ‘leaks’ and replacing the mains transformer.