Data set 01
1936 Cossor Valve Manual
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Optimum load
4000 ohm
Published datasheet value
Voltage Pentode - Sharp Cutoff (single) ·Pentode
40PPA
Cossor series-heater pentode for receiver and amplifier service, providing useful small-signal gain in AC/DC mains equipment.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B7
- Base pins
- 7
- Nominal heater
- 40 V / 200 mA
Description
Cossor 40PPA pentode for receiver/amplifier service as specified in the supplied catalogue datasheet.
Socket description
Medium 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B7
- Base pins
- 7
- Nominal heater voltage
- 40 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
Pentode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.004 S
- Max plate voltage
- 150 V
- Max screen 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.