[Amps] Switching PS for filaments?
TexasRF at aol.com
TexasRF at aol.com
Sun Feb 18 14:14:16 EST 2007
I'll get back to you in about 10 or 20 years and let you know if there have
been any more filament failures.
Tubes are expensive enough that I will spend the $10 to protect them even if
it is an imagined protection. Hell, I would surround them with hog hair if I
thought it would make them live longer!
Using your logic: I know they failed due to a defect how? I don't.
73,
Gerald K5GW
In a message dated 2/18/2007 11:48:31 A.M. Central Standard Time,
w8ji at w8ji.com writes:
> It may be 1 in 1000 but if you are the 1 you might well
> think the number is
> 1 in 1. After loosing the filament in a couple of 8877s
> and a TH347 over the
> years, I have become one of the fanatics!
.....and you know the filament would NOT have failed anyway
in that 1-in-1000 case WITH protection in that same tube
because ......????
Sometimes, like it or not, things just fail because they
have a manufacturing defect. That sometimes triggers us into
finding a pathological cure.
That's certainly OK so long as we know we are leaping to
conclusions. :-)
Of course it is a good idea to not use a transformer and
wiring that can dump 100 amperes into a 10 amp filament, the
question is what really caused the failure.
73 Tom
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