In 1938 Schade proposed a mechanism to transform a pentode tube into a triode by connecting the plate to the grid using a resistor network. Here is the graphs from is work "Beam Power tubes" by O. H. Schade, March 1938.
So I've simulated a few circuits to try to understand a bit more what is going on. All of you know the triodizer. Here are the simulations. The version described in the text with a battery at the gate:
and the circuit from a MIT lab course
Wonderful graphs don't you think!
I've also simulated the Fetzer valve circuit and as suspected the characteristic curves are not of that type... although it sounds good
This graphs and simulations does put things into perspective. çPalavras chave/keywords: tube, diy, triode, pentode
Última actualização/Last updated: 23-01-2017 [09:20]
1999-2017 (ç) Tiago Charters de Azevedo
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