Data set 01
1960 Mazda
Published operating points and test conditions from this source.
SECTION 1
Pentode
Capacitance
Anode-earth capacitance
12.5 pF
Grid-earth capacitance
7.75 pF
Anode-grid capacitance
0.005 pF
Voltage Radio Detector Converter ·Pentode
SP22
Directly heated screened high-frequency pentode for battery receivers, with documented use as both an RF amplifier and detector. Its economical filament and useful transconductance support portable receiver signal processing.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- 7
- Nominal heater
- 2 V / 100 mA
Description
Battery screened high-frequency pentode for H.F. amplification and detector service.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- 7
- Nominal heater voltage
- 2 V
- Nominal heater current
- 100 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
- Transconductance
- 0.0017 S
- Max plate voltage
- 150 V
- Max screen voltage
- 150 V
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.