Data set 01
1953 Amperex
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage without current
550 V
Screen voltage without current
550 V
Peak cathode current
28 mA
Voltage Pentode ·Pentode
2HR8
Pentode designed specifically for transitron circuits in television receivers, with ratings and capacitances tailored to that oscillator/control technique.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- E9-1
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 2.5 V / 600 mA
Description
Pentode intended for use in transitron circuits in television receivers, with design-center ratings and direct interelectrode capacitances.
Socket description
Small-button Noval 9-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- E9-1
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 2.5 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
E9-1 - 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
- 2500000 Ω
- Transconductance
- 0.002 S
- Amplification factor
- 38
- Max plate voltage
- 300 V
- Max screen voltage
- 200 V
- Max plate dissipation
- 1 W
- Max screen dissipation
- 0.2 W
- Max cathode current
- 4 mA
- Rectifier max heater-cathode voltage
- 169 V
Design-center maximum ratings and typical characteristics promoted from supplied sheet.
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.