Data set 01
1960 Mazda
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Construction
Filling
Gas
Specialized - Thyratron ·Tetrode
20A2
Gas-filled tetrode used as a grid-controlled rectifier. Control-grid triggering initiates gas conduction for electronically controlled power conversion.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- -
- Socket code
- IO
- Base pins
- -
- Nominal heater
- 6.3 V / 1 A
Description
Gas-filled tetrode used as a grid-controlled rectifier.
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
- -
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 1 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
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
- Max plate voltage
- 600 V
- Max cathode current
- 250 mA
- Rectifier peak inverse voltage
- 1300 V
- Rectifier forward voltage drop
- 9 V
REDO promoted-field audit
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.
Data set 02
1961 AEI Industrial Valves
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Characteristics
Control-grid series resistance
0.1-1.0 MOhm
Maximum heater-cathode voltage
25 V
Minimum heater warmup time
15 s
Data set 03
1961 Associated Electrical Industries
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Characteristics
Control-grid series resistance
0.1-1.0 MOhm
Maximum heater-cathode voltage
25 V
Minimum heater warmup time
15 s