Rich said:
>Low emission causes gas ionization?<
The original questionner asked if maybe the tubes were soft. My suggestion was
that if they weren't (no blue or purple glow between electrodes), low emission
was a more likely cause of his problem.
If the tubes are low emission, then as 572Bs have a thoriated filament, it
might be possible to rejuvenate them in the usual manner ( 150 to 200% filament
volts for 5 minutes, 125% for an hour). Times and results vary a bit, and it
doesn't always work. On the other hand, it can get a few more hours out of them.
73
Peter G3RZP
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