• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Adjustable distributed load discussion

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Yes. George (Tubelab) has also been working on this new Schade-like scheme, for longer than I have. He calls it UnSet, and CED for more general cases.

There are a bunch of variations one can try, including Crazy Fdbk (Crazy drive configured shunt Schade Fdbk ). One can use a P-channel Mosfet follower below the cathode for signal drive, or one can use an LTP type drive with a CCS tail. Even the original shunt Schade can be fixed up with an N channel Mosfet, in grounded gate mode (to eliminate grid V effects on the current), in the current feedback path. (Anatoly / Wavebourn mentioned such a design years back) Probably more variations out there.
 
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