Data set 01
1958 Mullard Receiving Tubes
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Application
Application
RF amplifier
Characteristics
Control-grid voltage for 100:1 gm reduction
-7 V
Voltage Tetrode ·Tetrode
PML2M
Directly heated RF tetrode for radio-frequency amplifier service. Its screen-grid construction improves gain and isolation in receiving circuits.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B4
- Base pins
- 4
- Nominal heater
- 2 V / 200 mA
Description
Directly heated RF tetrode for radio-frequency amplifier service.
Socket description
European 4-pin base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B4
- Base pins
- 4
- Nominal heater voltage
- 2 V
- Nominal heater current
- 200 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
- 0.0014 S
- Max plate voltage
- 150 V
- Max screen voltage
- 90 V
Published valve ratings and characteristics promoted where applicable; additional data 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.