Data set 01
1956 RCA Transmitting Tubes
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Maximum full-rating frequency
500 MHz
Construction
Cooling method
Forced air
Power - Tetrode (NOT beam) (over 1000V 100W) ·Tetrode
4X150D
26.5-volt-heater variant of the forced-air-cooled 4X150 family, designed for RF amplifier and oscillator service with full ratings to approximately 500 MHz.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- RADIALRING9
- Base pins
- -
- Nominal heater
- 26.5 V / 570 mA
Description
26.5 V heater variant of the forced-air-cooled external-anode 4X150A tetrode family.
Socket description
9-contact radial-ring transmitting-tube base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- RADIALRING9
- Base pins
- -
- Nominal heater voltage
- 26.5 V
- Nominal heater current
- 570 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
- Amplification factor
- 5
- Max plate voltage
- 1250 V
- Max screen voltage
- 300 V
- Max plate dissipation
- 250 W
- Max screen dissipation
- 12 W
- Max grid dissipation
- 2 W
- Max cathode current
- 250 mA
Promoted from printed maximum-rating and general-characteristics tables.
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
1962 Eimac
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Maximum plate voltage
1250 V
Maximum screen voltage
300 V
Maximum plate dissipation
150 W
Maximum screen dissipation
12 W
Maximum grid dissipation
2 W
Data set 03
1963 Amperex Condensed
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Plate voltage
1250 V
RFAmplifierOrOscillator; ClassC; Telegraphy
Plate current
200 mA
RFAmplifierOrOscillator; ClassC; Telegraphy
RF output power
195 W
RFAmplifierOrOscillator; ClassC; Telegraphy
Grid voltage
-90 V
RFAmplifierOrOscillator; ClassC; Telegraphy
Grid current
11 mA
RFAmplifierOrOscillator; ClassC; Telegraphy
Maximum frequency at full input rating
500 MHz
Screen voltage
250 V
RFAmplifierOrOscillator; ClassC; Telegraphy
Capacitance
Grid-to-plate capacitance
0.03 pF
Grid-to-filament/cathode capacitance
15.7 pF
Plate-to-filament/cathode capacitance
4.3 pF
Data set 04
1971 RCA HB3 Binder 6 of 7
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
Maximum DC Plate Voltage
2000 V
Forced-air-cooled RF service Alias of 7035.
Maximum DC Screen Voltage
400 V
Forced-air-cooled RF service Alias of 7035.
Plate Dissipation
250 W
Forced-air-cooled RF service Alias of 7035.
Screen Input
12 W
Forced-air-cooled RF service Alias of 7035.
Typical DC Plate Voltage
2000 V
Forced-air-cooled RF service Alias of 7035.
Typical DC Screen Voltage
300 V
Forced-air-cooled RF service Alias of 7035.
Useful Power Output
100 W
Forced-air-cooled RF service Alias of 7035.
Characteristics
Mu Factor, Screen to Control Grid
5
Forced-air-cooled RF service Alias of 7035.
Grid-No.1 to Plate Capacitance
0.05 pF
Forced-air-cooled RF service Alias of 7035.
Grid-No.1 to Cathode/Screen/Heater Capacitance
16 pF
Forced-air-cooled RF service Alias of 7035.
Plate to Cathode/Screen/Heater Capacitance
4.4 pF
Forced-air-cooled RF service Alias of 7035.