• 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.

6AS7 or 2A3...

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do you have plate curves for triode strapped 6DQ6 ?
6DQ6 came in three flavors, 6DQ6 (CBS 1955), 6DQ6A (RCA 1956), and 6DQ6B (GE 1959).

Many other tubes used the 6DQ6A tube guts: early 6FW5, 6GA7, 6GC6, (7754, 7695 rated at high current, same guts)

Later Compactrons used the 6DQ6B guts: 6JN6, 6GE5, 6GV5, 6JM6, 12JF5, later 6FW5's

Some 6FW5 and 6GE5 triode mode curves here:
VinylSavor: Tube of the Month : The 6FW5
VinylSavor: Tube of the Month : The 6GE5

Many other TV Horizontal Sweep tubes have good triode mode curves if curve tracer selected. 6CB5 has been used for SETs for example.

6AS7 would only be suitable for P-P, high 2nd H in SET mode
 
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