Question : For the larger tubes with handles ( commercial service ) Does grid current increase or decrease as plate voltage and screen voltage is removed. ? If it takes 250 watts to produce 100ma of
As you mention screen voltage, I assume you are talking of tetrode amplifiers. In a conventional grounded cathode/filament 4CX tetrode linear amplifier biased for class AB1 operation, the control gri
<Question <For the larger tubes with handles ( commercial service ) <Does grid current increase or decrease as plate voltage and screen <voltage is removed. ? <If it takes 250 watts to produce 100ma
Hi Don, The grid dissipation of the 4CX10000D is 75W. It takes 150W of drive for 250mA of grid current with that tube in class-c with anode and screen voltage supplied. Are you thinking of a differen
Usually the Class C grid current decreases somewhat when the plate and screen voltages are applied, due to more electrons are drawn away from the grid. The actual grid dissipation can be estimated as
Peter, Thanks for your reply. I used the 4CX10,000 as an example because not many transmitters use the 4CX7500 ( Harris HT10-FM ) A FM transmitter that I have installed in 1995 .... almost 25 years n