Data set 01
1958 Mullard Receiving Tubes
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate Voltage
135 V
ClassA
Screen Voltage
135 V
ClassA
Plate Current
5.6 mA
ClassA
Power Output
0.34 W
ClassA
Power - Pentode Single (NOT beam) (under 10W) ·Pentode
PM22A
Directly heated 2 V battery power pentode providing approximately 340 mW Class A audio output.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B4
- Base pins
- 4
- Nominal heater
- 2 V / 150 mA
Description
The Mullard PM22A is a directly heated 2 V battery output pentode with about 340 mW Class A output.
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
- 150 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
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 150000 Ω
- Transconductance
- 0.0022 S
- Max plate voltage
- 150 V
- Max plate dissipation
- 1 W
Battery audio output pentode.
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.