12B4 - TekWiki
The 12B4(A) (P/N 154-044, 154-0044-00) is a power triode vacuum tube with a B9A (Noval) miniature 9-pin base. It has 5.5 W maximum plate dissipation, 1000 V peak plate voltage, and and 105 mA peak cathode current.
The 12B4 is used in the 126, 551, and 555, and as a pass tube in the power supply of the 513, 581/585, and 570.
The 12B4A (154-0044-00) is similar except for the controlled heater warm-up, suitable for use in conjunction with other 600 mA types.
Data
- General Electric 12B4A data sheet
- 12B4 / 12B4A @ radiomuseum.org
Pictures
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12B4 Tube
Used in
Some instruments using part 12B4
Instrument
Manufacturer
Class
Model
Description
Introduced
126
Tektronix
Plug-in
126
Power Supply Module
1952
310
Tektronix
Oscilloscope
310A
4 MHz oscilloscope
1955
310A
Tektronix
Oscilloscope
310A
4 MHz oscilloscope
1959
316
Tektronix
Oscilloscope
316
10 MHz 3" tube scope
1959
317
Tektronix
Oscilloscope
317
10 MHz 3" tube scope
1959
502
Tektronix
Oscilloscope
502
1 MHz dual beam differential scope
1958
502A
Tektronix
Oscilloscope
502A
1 MHz dual beam differential scope
1963
513
Tektronix
Oscilloscope
513
18 MHz scope
1950
524
Tektronix
Oscilloscope
524AD
TV waveform monitoring scope
1953
526
Tektronix
Audio/Video
526
NTSC Vectorscope
1959
535
Tektronix
Oscilloscope
535
10 (15) MHz dual-timebase scope
1954
541
Tektronix
Oscilloscope
541
30 MHz oscilloscope
1955
545
Tektronix
Oscilloscope
545
30 (33) MHz oscilloscope
1955
545A
Tektronix
Oscilloscope
545A
30 (33) MHz oscilloscope
1959
546
Tektronix
Oscilloscope
546
50 MHz oscilloscope
1964
547
Tektronix
Oscilloscope
547
50 MHz oscilloscope
1964
549
Tektronix
Oscilloscope
549
30 MHz storage oscilloscope
1965
551
Tektronix
Oscilloscope
551
27 MHz scope
1958
555
Tektronix
Oscilloscope
555
Dual beam 30 MHz scope
1959
570
Tektronix
Curve Tracer
570
Curve tracer for tubes
1955
581
Tektronix
Oscilloscope
581
100 (95) MHz oscilloscope
1959
581A
Tektronix
Oscilloscope
581A
85 MHz oscilloscope
1963
585
Tektronix
Oscilloscope
585
100 (95) MHz oscilloscope
1959
585A
Tektronix
Oscilloscope
585
85 MHz oscilloscope
1963
Keithley 610
Keithley
Multimeter
610
Electrometer
1960