Yes Peter,
Please find attached a scan of the GU74B page of the official Svetlana
product cathalog for 2004.
73, Val LZ1VB
----- Original Message -----
From: "Peter Voelpel" <df3kv@t-online.de>
To: <amps@contesting.com>
Sent: Wednesday, October 24, 2012 1:43 AM
Subject: Re: [Amps] Question re GU-74B grid current
Corrected by Svetlana?
Please send a copy of the revised data sheet of the GU74b.
73
Peter, DJ7WW
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Val
The 800W labeling of GU74B wasn't fraudent, but a pretty fair. If this
tube
was designed by EIMAC, or other western company it would have been
undoubtedly labeled 4CX800. Compare its size, grid and screen to 4CX600
and 4CX1000.
Underrating of GU74B proceeded from the political and economic system in
Russia.
It wasn't market driven, there was no competition, the price of the tube
and
the price per watt weren't of big importance. However it was really
dangerous for the designers if the tube failed to meet its specifications.
That's why they rather insured their lives by rating the 800 watts tube
at
600 watts.
This was corrected only 25 years later.
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