Data set 01
1932 Cunningham Radio Tubes
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Grid-plate capacitance
0.025 pF
Published direct interelectrode capacitance
Voltage Tetrode ·Tetrode
22
Screen-grid tetrode intended for receiver voltage amplification, detector, oscillator, or general Class-A service as documented by the manufacturer.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 4K
- Socket code
- UX4
- Base pins
- 4
- Nominal heater
- 3.3 V / 132 mA
Description
Directly heated screen-grid tetrode for high-frequency amplification.
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
- 4K
- Socket code
- UX4
- Base pins
- 4
- Nominal heater voltage
- 3.3 V
- Nominal heater current
- 132 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
4K - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1F | — | F — Filament | Unverified EIA Base Connections, printed page 127, 4K |
| PIN2P | A | P — Plate (Anode) | Unverified EIA Base Connections, printed page 127, 4K |
| PIN3G2 | A | G2 — Screen Grid | Unverified EIA Base Connections, printed page 127, 4K |
| PIN4F | — | F — Filament | Unverified EIA Base Connections, printed page 127, 4K |
| CAP1G1 | A | G1 — Control Grid | Unverified EIA Base Connections, printed page 127, 4K |
Section ratings
1 physical section, each with unique specifications.
Section 1
Tetrode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 600000 Ω
- Transconductance
- 0.00047999999999999996 S
- Max plate voltage
- 135 V
- Max screen voltage
- 67.5 V
Published ratings and characteristics promoted from the approved datasheet.
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
1937 Raytheon Radio Receiving Tubes
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
MED. BRSE Maximum Screen Voltage
67.5 V
Published ratings
Plate Voltage
135 V
ClassA; Column1
Plate Voltage
135 V
ClassA; Column2
Screen Voltage
45 V
ClassA; Column1
Screen Voltage
67.5 V
ClassA; Column2
Grid Bias
-1.5
ClassA; Column1
Grid Bias
-1.5
ClassA; Column2
Amplification Factor
270
ClassA; Column1
Amplification Factor
160
ClassA; Column2
Plate Resistance
0.725 Mohm
ClassA; Column1
Plate Resistance
0.325 Mohm
ClassA; Column2
Transconductance
375 uS
ClassA; Column1
Transconductance
500 uS
ClassA; Column2
Plate Current
1.7 mA
ClassA; Column1
Plate Current
3.7 mA
ClassA; Column2
Screen Current
0.6 mA
ClassA; Column1
Screen Current
1.3 mA
ClassA; Column2
screen voltage of
45 Mohm
ClassA; Column1
screen voltage of
1 Mohm
ClassA; Column2
screen voltage of
67.5 Mohm
ClassA; Column3
Capacitance
Grid to Plate
0.02 pF
Published capacitance
Input
343 pF
Published capacitance
Output
12
Published capacitance
Data set 03
193X Cunningham
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Characteristics
Heater/filament voltage
3.3 V
Published nominal
Heater/filament current
132 mA
Published nominal
Transconductance
500 uS
Published characteristic
Data set 04
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Filament voltage
3.3 V
Filament current
132 mA
Data set 05
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Characteristics
Input capacitance
3.5 pF
Output capacitance
10 pF
Grid-to-plate capacitance
0.02 pF
Plate resistance
325000 ohm
ClassA; OperatingPoint1
Transconductance
500 uS
ClassA; OperatingPoint1
Other
Plate voltage
135 V
ClassA; OperatingPoint1
Screen voltage
67.5 V
ClassA; OperatingPoint1
Control-grid bias
1.5 V
ClassA; OperatingPoint1
Plate current
3.7 mA
ClassA; OperatingPoint1
Screen current
1.3 mA
ClassA; OperatingPoint1
Maximum plate voltage
135 V
Maximum screen voltage
67.5 V