In message <j52p27+bpi2@...>, dated Sat, 17 Sep 2011, Charly Engineering <charly020664@...> writes:
I could work out mu and k for that tube-model. Unfortunately I could not get any value for Rgk of the tube. :-(
Rgk is a problem ....
Are you going to operate it with grid positive to cathode? If not, you don't need Rgk. If you are going to, you will need to find a characteristic for grid current versus positive grid voltage, or actually measure it. From that you can calculate Rgk.
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