Data set 01
1951 Mullard Valve and Service Manual
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Operating Frequency Maximum
200 MHz
Plate Voltage
400 V
PushPull,ClassC
Power Output
44 W
PushPull,ClassC
Power - Beam (NOT sweep) ·BeamPower
QQV0420
Twin beam tetrode with center-tapped heater designed for push-pull RF power-amplifier and oscillator service to approximately 200 MHz.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater
- 6.3 V / 2 A
Description
Twin beam tetrode for push-pull RF power amplifier or oscillator service to about 200 MHz, with center-tapped heater for series or parallel connection.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- -
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 2 A
- Parallel heater voltage
- 6.3 V
- Parallel heater current
- 2 A
- Series capable
- Yes
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
Beam Power
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.004 S
- Amplification factor
- 6.5
- Max plate voltage
- 400 V
- Max screen voltage
- 225 V
- Max plate dissipation
- 10 W
- Max screen dissipation
- 2.25 W
Published ratings and characteristics promoted semantically from the approved source; repeated identical physical sections compressed where applicable.
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.