>> Tom -
>>
>> I'm surprised that you asked a question even rhetorically about massive
>> currents in power grid tubes. Check the Eimac data sheet (Curve #4211)
>> for an 8877/3CX1500A7.
>>
>> At a grid voltage of +180 and a plate voltage of about 2700, plate
>> current is 14 amperes (!) and grid current is over 200 mA. Grid current
>> sky rockets as plate voltage drops. With +190V on the grid and about
>> 950 on the plate, plate current is 12 amperes and grid current is 2000
>> mA (!!). It doesn't take much imagination to believe that the grid
>> current could go to MANY amperes if the plate voltage were near zero.
>Imagination takes us where facts do not.
Eimac's pulse-rated version of the 8877 has a peak emission rating of
50A at a pulse width of 10uS.
>Call Varian and ask them what the saturated current of a 3-500Z is.
...snip...
How did we get from 8877 to 3-500Z?
Perhaps calling Varian would not be in your best interest, Mr. Rauch.
When I did so during the vhf parasitics debate, it seemed as though I was
told me a bit more than you would have liked.
Rich---
R. L. Measures, 805-386-3734, AG6K
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