Data set 01
1936 Cossor Valve Manual
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Optimum load
9000 ohm
Published datasheet value
Voltage - Triode (single) ·Triode
220P
Cossor directly heated triode for receiver and amplifier service, using a two-volt battery filament.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B4
- Base pins
- -
- Nominal heater
- 2 V / 200 mA
Description
Cossor 220P triode for receiver/amplifier service as specified in the supplied catalogue datasheet.
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
- -
- 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
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 4000 Ω
- Transconductance
- 0.00225 S
- Amplification factor
- 9
- Max plate voltage
- 150 V
Published ratings and characteristics promoted from approved datasheet.
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.