It is difficult to determine if the valve heaters are working, a milliamp meter in the LT supply might be a better way to see if heater current is being drawn.
Geof
Quote:
Originally Posted by Hunts smoothing bomb
I have several similar Vidor sets and when the heaters are running at the correct voltage (1.4v) you can just and just see a dull red glowing cord of light in a pitch dark room in the centre of each valve.
Cheers
Lee
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