The 6CM6 is a 12 W beam-power pentode vacuum tube with a B9A (Noval) miniature 9-pin base, similar to a 6V6GT.

Some instruments using part 6CM6

Instrument Manufacturer Class Model Description Introduced
Keithley 660A Keithley Multimeter 660A Differential voltmater 1968

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Some instruments using part 6CM6

Instrument Manufacturer Class Model Description Introduced
Keithley 660A Keithley Multimeter 660A Differential voltmater 1968