Data set 01
1944 Hytron
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
MaximumPulseLength
10 us
Power - Tetrode (NOT beam) ·Tetrode
3D21
High-vacuum beam-power tube designed primarily for blocking-oscillator and pulse-modulator service, also usable as a deflection amplifier where short high-power pulses are required.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 1.7 A
Description
High-vacuum blocking oscillator and pulse modulator also suitable as a deflection amplifier; pulse operation was a primary design requirement.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 1.7 A
- Parallel heater voltage
- 6.3 V
- Parallel heater current
- 1.7 A
- Series capable
- Yes
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Tetrode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0058 S
- Max plate voltage
- 1500 V
- Max screen voltage
- 300 V
- Max plate dissipation
- 15 W
- Max screen dissipation
- 2 W
Published ratings and characteristics promoted where clearly legible in the approved source.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.