Data set 01
1936 Cossor Valve Manual
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristics
Mutual conductance
3000 uS
Intended service
Domestic audio output
Voltage Pentode - Sharp Cutoff (single) ·Pentode
PT41
Cossor pentode for conventional amplifier service in mains-powered equipment without a more specific documented application.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B5
- Base pins
- 5
- Nominal heater
- 4 V / 1 A
Description
PT41: Cossor pentode valve. The complete Cossor sheet was read for construction, technical data, operating recommendations, and application notes.
Socket description
European 5-pin base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B5
- Base pins
- 5
- Nominal heater voltage
- 4 V
- Nominal heater current
- 1 A
- 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
- 0.003 S
- Max plate voltage
- 250 V
- Max screen voltage
- 200 V
Published ratings/characteristics promoted from the 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.
Data set 02
193X Cossor
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Filament/Heater Voltage
4 V
Published technical-data value
Filament/Heater Current
1 A
Published technical-data value
Maximum Anode Voltage
250 V
Published technical-data value
Maximum Screen Voltage
200 V
Published technical-data value
Characteristics
Mutual Conductance
3000 µS
Published technical-data value