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True, but it seems odd to go to all the effort, and add $10 worth of components and complexity in order to protect a $2 capacitor. In my tube supplies, I have a similar soft-start as what I posted above, and the RC on the gate keeps the B+ under 68% of it's max until about 10 seconds after the heaters are energized. Heater inrush is controlled with an NTC on the primary (which tends to help all of the secondary rails simultaneously).
True, but it seems odd to go to all the effort, and add $10 worth of components and complexity in order to protect a $2 capacitor.
In my tube supplies, I have a similar soft-start as what I posted above, and the RC on the gate keeps the B+ under 68% of it's max until about 10 seconds after the heaters are energized. Heater inrush is controlled with an NTC on the primary (which tends to help all of the secondary rails simultaneously).
