"Arfa Daily" bravely wrote to "All" (19 Jan 06 01:49:16)
--- on the heady topic of " Marshall 4140 Amp question"

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AD lowering of the HT rail. Glowing anodes are the order of the day here,
AD but I would rather have that, as the outputs will stand this for a
AD considerable time without damage, rather than have exploding or
AD shorting electrolytics, brought on by voltage stress.


Arfa,

High voltage electros have a surge rating about 20% higher than the
wvdc specified on the can. A brief surge less than the few seconds it
takes to get a reading will not usually be a problem. OTOH leaving the
tubes in runs the real risk of having a large current burn out a
transformer winding. Which risk would you prefer to take; ending up
with on your workbench: a smoking rectifier with a zapped electro, or
an open winding in a cherished rare vintage audio output transformer?

A*s*i*m*o*v

.... Transformer designers take turns doing it.