Will some of you folks who know what you are doing please look at this
tube (G-811) and tell me if it can be used as a direct replacement for
the 811a tubes. I have asked about this before, but I never did get any
replies. Thanks to all who do take time to help me...73....Tom...W4TH
here is a link to the tube:
http://www.tubes.ru/techinfo/TransmittingTubes/g-811.html
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OPERATING ENVIRONMENTAL CONDITIONS
Ambient temperature, °C-60 to +70
Relative humidity at up to +25 °C, %98
BASIC DATA?
Electrical Parameters
Filament voltage, V6.3
Filament current, A3.75-4.25
Gain coefficient (at grid voltages 0 and -2 V and anode? current 20mA)
144-176 Anode current (at anode voltage 2 kV and grid? voltage -2 V),
mA16-36 Interelectrode capacitance, pF:input 4.5-6.5 output 0.4-0.8
transfer 4.8-6.2
Output power (at anode voltage 1.5 kV and anode current 150 mA), W, at
least: at frequencies up to 15 MHz 135 W
at frequency 60 MHz 125 W
Limit Operating Values
Filament voltage, V-6-6.6
Anode voltage, kV-1.25
Grid voltage, V0
Anode current, mA-125
Grid current (DC component), mA-50
Anode dissipation, 40 W
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