[ARC5] MFPO- Before or After

[J. Forster]

Recently, I got a NOS (?) Output Meter for an ASB-5 RADAR set. I powered
it today and smelt like something was burning, so powered it down.

It turns out the filament series resistor, a standard ceramic wirewound
type had burn marks on it. I was puzzled because the resistor had looked
new ten minutes before. It turns out, there was some varnish on the
resistor that had charred when the resistor got hot. (It scraped off
easily).

Now, I would have expected that the unit would have been tested before
shipment. Had that happened, the resistor would have been charred.

So, the question is, would an MFP coating have been applied after final
test or before. This unit implies it was applied after, but that doesn't
really make sense either.

Best,

-John

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