Power - Pentode (NOT beam) ·Pentode
PT625
Marconi super-power pentode for higher-output audio service at anode voltages to approximately 250 V.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B5
- Base pins
- 5
- Nominal heater
- 6 V / 250 mA
Description
Super-power pentode for anode voltages up to 250 V.
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
- 6 V
- Nominal heater current
- 250 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
- Plate resistance
- 43000 Ω
- Transconductance
- 0.00185 S
- Max plate voltage
- 250 V
- Max screen voltage
- 200 V
Published ratings/characteristics promoted from the approved datasheet where legible.
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.