[Amps] GU 74 operating parameters

[Ulf Tjerneld]

Yet there are many commercial amp manufacturers, Acom among them, running GU74 on a plate voltage well above 2500 volts and at the same time claiming a 1 KW output. That means they are really exceeding the specs.

73's Ulf SM0NOR


7 jan 2010 kl. 02.32 skrev Bill, W6WRT:

> ORIGINAL MESSAGE:
> 
> On Wed, 6 Jan 2010 19:56:03 +0100, Karl-Arne Markström <sm0aom at telia.com> wrote:
> 
>> First, the quoted limits apply to the 4CX800, for the Russian GU74B they are 
>> 2000V and 0,5 A respectively.
> 
> REPLY:
> 
> There seems to be some confusion as to what specs apply. According to
> 
> http://frank.pocnet.net/sheets/018/g/GU74B.pdf
> 
> The max anode current is .75 A, not .5. 
> 
> In any event, the tube specs are different from a 4CX800A, despite what RF Parts
> spec sheet says. For one thing, the plate diss is only 600 watts, not 800. 
> 
> 73, Bill W6WRT
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