Data set 01
1951 Mullard Valve and Service Manual
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
HeaterOrFilamentVoltage
30 V
HeaterOrFilamentCurrent
300 mA
Application
LineTimeBaseOutput
Power - TV Horizontal Output (sweep) ·Pentode
PL38
Series-heater line-output pentode designed for television horizontal time-base service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 30 V / 300 mA
Description
Series-heater line-output pentode for television time-base service.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 30 V
- Nominal heater current
- 300 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
- 20000 Ω
- Transconductance
- 0.0135 S
- Max plate voltage
- 800 V
- Max screen voltage
- 400 V
- Max plate dissipation
- 12 W
- Max screen dissipation
- 8 W
- Max cathode current
- 200 mA
TV line-output pentode with pulse ratings.
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
1958 Mullard Receiving Tubes
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Typical Plate Voltage
200 V
Typical Screen Voltage
200 V
Plate Current
75 mA
Other
Peak Plate Voltage
8000 V
Pulse
Booster Plate Voltage
1200 V
LineOutputService
Data set 03
1963 Mullard
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Characteristic plate voltage
200 V
Characteristic screen voltage
200 V
Characteristic grid voltage
-5.5 V
Plate current
75 mA
Screen current
9 mA
Capacitance
Input capacitance
18 pF
Output capacitance
6.5 pF
Plate-grid capacitance maximum
1.2 pF
Other
Plate pulse voltage maximum
8000 V
Pulse
Plate supply voltage maximum
1200 V
Screen pulse/supply voltage maximum
800 V
Grid resistance maximum at plate dissipation <25 W
500 kohm
Grid resistance maximum at plate dissipation <9 W
800 kohm
Heater-cathode voltage maximum
200 V