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But!!!

152.163.100.16

What's going on with the usual NFB idea is the output is fed back to *THE* input. In the pentode, the output is fed back to *AN* input. In the triode/pentode case the pentode( taken as a beam tube with beam plates attached to the cathode for simplification ) degenerates from a 4 element device to a 3 element device when the g2 reaches the anode.


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