[Amps] Two questioins about tetrode amplifiers.

[Rob Atkinson]

>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