Carl,
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.
73, Val LZ1VB
Yeah sure. A 600W rated tube fraudently labled 800W to grab US dollars.
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