moamps said:http://www.mif.pg.gda.pl/homepages/frank/sheets/030/e/EF40.pdf
page 3
I'm suspecting you are thinking of a mike head amp which may run closer to 0.5mA
Then I calculated the plate resistance (Rp). Rp is defined as a change in plate voltage divided by a change in plate current with the grid voltage held constant, so I changed the plate voltage by +10 volts and followed the grid voltage curve for a reading of plate current, which showed a change of .125mA. So 10V/.125mA = 80000, or 80K. (Don't forget to move the decimal! .125mA = .000125A)
mich said:im trying to match a transformer -
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