In Reply to: RE:45vdc ok for 2a3 heaters and grid? posted by DAK on April 15, 2016 at 01:30:54:
The 2A3 bias voltage is 45 volts at the most standard operating point - see the link for a typical data sheet.
What is called the filament voltage is applied across the filament, measured with one meter probe on pin 1 and the other on pin 4. Really, there is no such thing as a voltage; there are only voltage differences. Usually but nowhere near always, one of the probes is on the ground - but even then, sometimes you also need to choose between signal ground, power supply ground, and safety ground.
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Follow Ups
- RE:45vdc ok for 2a3 heaters and grid? - Paul Joppa 08:28:20 04/15/16 (1)
- RE:45vdc ok for 2a3 heaters and grid? - DAK 09:36:59 04/15/16 (0)