[Amps] Calculation of Tube Impedance

[Lee Buller]

I am at a loss to figure out how to calculate the output impedance of a tube or a pair of tunes.  I cannot find an old Handbook that had the information ((I think it is still packed from a previous move)   I I remember right...it has something to do with the operating HV potential and current.

I am looking for the impedance of two GI7-B tunes in parallel as I am getting ready to build such a beast on HF.  Just for the fun of it.

Lee
K0WA



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