The voltage and current are right on..I plugged one of my tubes into same
socket and tube heats up fine.. This other tube has a code date of 89 and has
YU158 and 3cx1500a7 on it. Anyway I sent the tube back to my friend but I would
like to know why it would not heat up..
73s Bob W5RG
On Saturday, April 1, 2023 at 03:28:14 PM CDT, Ron W4BIN <ka4inm@gmail.com>
wrote:
Bob Gibson via Amps wrote:
> What would cause the filament not to get hot if there is continuity between
> the pins when 5 volts is applied? The tube has been sitting for seven or
> eight years.
> Bob
Measure the filament current.
--
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