Data set 01
1958 Mullard Receiving Tubes
Published operating points and test conditions from this source.
SECTION 1
Triode
Characteristics
Plate Voltage
150 V
Plate Current
13.5 mA
Grid Voltage
-1.35 V
Voltage - Triode (single high frequency) ·Triode
M8248
Special-quality UHF triode for grounded-grid amplification in equipment exposed to severe vibration and shock.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B7G
- Base pins
- -
- Nominal heater
- 6.3 V / 400 mA
Description
SPECIAL QUALITY U.H.F. TRIODE Special quality triode for use as a grounded grid amplifier in equipment where mechanical vibration and shocks are M8248 unavoidable and where statistically controlled major electrical characteristics are required. This data should be read in conjunction with the GENERAL NOTES— SPECIAL The supplied datasheet publishes electrical ratings and characteristics for this triode device.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B7G
- Base pins
- -
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 400 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
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 37000 Ω
- Transconductance
- 0.0135 S
- Amplification factor
- 50
- Max plate voltage
- 165 V
- Max plate dissipation
- 2.7 W
Special-quality UHF triode.
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
1963 Mullard
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater or filament voltage
6.3 V
Heater or filament current
400 mA
MaxPlateVoltage
165
Promoted field source value
MaxPlateDissipation
2.7
Promoted field source value
Characteristic
Plate Resistance
37000
Promoted field source value
Transconductance
0.0135
Promoted field source value
Amplification Factor
50
Promoted field source value
Plate current
13.5 mA