08-06-2022, 08:28 PM
(This post was last modified: 08-06-2022, 08:29 PM by ppppenguin.)
You said 30nF. Can't read the markings but nF wasn't used back then. Is it marked 0.03uF?
It should be OK but I'd be tempted to replace regardless. You can meaure the grid voltage on the UL84. If it's not negative with respect to chassis then the cap is definitely faulty. Or it can be checked with a megger.
The green snubber cap on the on/off switch is interesting. Marked BS415 and 3kV. Obviously a safety rated part in the days before X and Y rated caps.
It should be OK but I'd be tempted to replace regardless. You can meaure the grid voltage on the UL84. If it's not negative with respect to chassis then the cap is definitely faulty. Or it can be checked with a megger.
The green snubber cap on the on/off switch is interesting. Marked BS415 and 3kV. Obviously a safety rated part in the days before X and Y rated caps.
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