Tom says:
>Actually the saturated emission current can be as high as 100 mA per
>watt at normal operating temperatures of 1900k (the section on
>Electron Emission, page 9-9, of Electronic Designers Handbook by
>Giacoletto).
>In pulse service, with 5.5 volts on the filament, Eimac supplied
>data indicates the saturated current is just over 10 amperes with
>3000 volts of positive grid voltage and 5000 volts on the anode.
I got my figures from Terman. Even if I'm wrong, it's only a factor of 2. I
still find it hard to believe that you can get enough emission from that
filament to have currents large enough to bend grids or filaments, and I
still maintain that if the tube is oscillating, the current has to come from
the filament. Grids and plates have too low a work function for you to get
enough emission from them.
As far as 6146's are concerned, I don't have the curves here at work. Remind
me next month - I'm away next week at a CEPT meeting in Hungary.
73
Peter G3RZP
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