6CB6A

The 6CB6(A) (European: EF190) (P/N 154-0030-00) is a pentode vacuum tube with a miniature B7G 7-pin base.

It is used in the vertical output amplifier of the 517, and the output coupling stage of the 112.

6CB6 and 6CB6A (EF190) are identical, except for the controlled heater-warmup time of 6CB6A.

Tek part numbers:

Aged/Checked/Matched Pair Details
Used in	Tek Part#	S/N Range
513 (V15, V28)	157-0004-00	All
517 (V601-612, V701-724)	157-0005-00	All
105 (V9)	157-0005-00	N/A
105 (V1, V2)	157-0020-00	All
?	157-0028-00	N/A
541 (V1060, V1066, V1080-V1132)	157-0037-00	101-6474
545 (V1060, V1066, V1080-V1132)	157-0037-00	101-9291

Instrument	Manufacturer	Class	Description	Introduced
105	Tektronix	Signal generator	25 Hz to 1 MHz square wave generator	1950
112	Tektronix	Amplifier	Differential amplifier	1949
2A63	Tektronix	Plug-in	300 kHz differential amplifier plug-in	1962
316	Tektronix	Oscilloscope	10 MHz 3" tube scope	1959
317	Tektronix	Oscilloscope	10 MHz 3" tube scope	1959
503	Tektronix	Oscilloscope	450 kHz differential-input scope	1960
504	Tektronix	Oscilloscope	450 kHz scope	1960
513	Tektronix	Oscilloscope	18 MHz scope	1950
514	Tektronix	Oscilloscope	10 MHz scope	1949
517	Tektronix	Oscilloscope	50 MHz scope	1951
525	Tektronix	Oscilloscope	TV waveform monitor	1955
535	Tektronix	Oscilloscope	10 (15) MHz dual-timebase scope	1954
541	Tektronix	Oscilloscope	30 MHz oscilloscope	1955
545	Tektronix	Oscilloscope	30 (33) MHz oscilloscope	1955
63	Tektronix	Plug-in	300 kHz differential amplifier plug-in	1961

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