Data set 01
1931 Cunningham Radio Tubes
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Characteristics
Filament/heater voltage
2 V
Filament/heater current
130 mA
Transconductance
505 uS
Voltage Tetrode ·Tetrode
CX332
Cunningham directly heated screen-grid tetrode for RF amplification and detector service in battery-operated receivers. Its low-power filament suits portable equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- UX4
- Base pins
- 4
- Nominal heater
- 2 V / 130 mA
Description
CX332: Cunningham screen-grid RF amplifier/detector. The complete bulletin was read for construction, ratings, circuit recommendations, and operating characteristics.
Socket description
Medium-shell UX 4-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- UX4
- Base pins
- 4
- Nominal heater voltage
- 2 V
- Nominal heater current
- 130 mA
- 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
- Transconductance
- 0.000505 S
Published ratings and characteristic constants promoted where applicable; operating recommendations retained as parameters.
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.