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One vote for "Triode", one for "Modulator" but I like "Special Triode Connection"

...-With 750V on the anode, that's clearly an ICAS design. I find the need for a 10W low impedance driver kinda off putting. By contrast, RCA suggests a conventional pentode ICAS AB2 operating point @ 750V/300V that's capable of 120W with only 200mW drive. It seems the primary advantage of the "special triode" connection is that it does away with a decently regulated g2 supply but adds the expense of a relatively powerful driver.

Curves for this connection are probably "interesting".


Edits: 11/13/21
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