[Amps] Gettering the GU-74B

Peter Junker dg6man at pjconsult.de
Mon Nov 1 13:36:40 PDT 2010


Dear Fellows,

What is the best procedure to getter a NOS GU-74B.

A befriended OM brought me his fairly new ZZ 750 PA with a failure of
the Zener diodes for the screen voltage.

To get this "Kalashnikov" like technology a bit more refined, I will insert
a G3SEK Tetrode Board.

But it is also interesting how to get this tube properly gettered, in order to
avoid arcing to the best possible.

In a German forum it came to my attention that the GU-74B can be very nasty
with regard to arcing.


_____________
vy 73 de dg6man
peter


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