6197

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The 6197  (P/N 154-0146-00) is a 7.5 W power pentode vacuum tube with a B9A (Noval) miniature 9-pin base. It is similar to the 6CL6 but rated for "on-off control applications involving long periods of operation under cutoff conditions", meaning that its cathode resists forming an interface layer. This is valuable even in always-on locations like the 535 vertical amplifier, where an interface layer would reduce low frequency gain.

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Used in

Some instruments using part 6197

Instrument Manufacturer Class Model Description Introduced
3A75 Tektronix Plug-in 3A75 4 MHz amplifier plugin 1964
516 Tektronix Oscilloscope 516 15 MHz dual-trace scope 1960
531 Tektronix Oscilloscope 531 10 MHz oscilloscope 1954
533 Tektronix Oscilloscope 533 15 MHz oscilloscope 1958
535 Tektronix Oscilloscope 535 10 (15) MHz dual-timebase scope 1954
547 Tektronix Oscilloscope 547 50 MHz oscilloscope 1964
556 Tektronix Oscilloscope 556 50 MHz dual beam scope 1966
75 Tektronix Plug-in 75 4 MHz amplifier plug-in 1961

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