On Fri, 05 Dec 1997 20:25:23 EST km1h@juno.com (km1h @ juno.com) writes:
>Is there any way to tell if you received a true rebuilt and not just a
>quick acetylene treatment?
>Tnx Carl KM1H
Howdy, Carl:
I don't know. If there is, I'd like to hear about it. I suppose you
might be able to notice a quicker drop in emission as you reduce the fil.
voltage over the first few hundred hours, maybe... I would expect it to
age much faster, (even with proper filament voltage maintenance).
All I can say is all of the rebuilds of good duds I've had (that I can
remember) have also turned out to be good, long life emitters. Just as
good as a new tube. If they were just gassed, I doubt the life would
extend much beyond 5000 hours at best. In other words, if they last
long, they must be the real thing!? Very scientific...
Empirically,
Gary - W3AM
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|