28-06-2020, 07:16 PM
(This post was last modified: 28-06-2020, 07:17 PM by Mike Watterson.)
The EZ81 should be on it's own isolated 6.3V that optionally has one side connected to the cathode of it.
The EZ81 cathode is at +HT, so earthing any aspect of the 6.3V heater supply to it may cause heater cathode leakage.
see https://www.radiomuseum.org/tubes/tube_ez81.html
The EZ81 cathode is at +HT, so earthing any aspect of the 6.3V heater supply to it may cause heater cathode leakage.
see https://www.radiomuseum.org/tubes/tube_ez81.html