>Could someone please confirm the output impedance of a classic tetrode
>linear amplifier does'n change as plate voltage sags or swings?
It's a simple matter of Ohm's law. If the plate current doesn't
change then of course the anode Z changes if the voltage changes. The
number of electrodes in the tube doesn't matter.
>so I tried removing it from the socket and replacing
>it with a 2500ohm non inductive resistor then I tried to probe the output
>port. I think this didn't show me the correct values.
How did you connect the resistor? You don't have to remove the tube
when you do this. Are you a ham? What is your callsign?
73
Rob
K5UJ
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