Power - Beam (NOT sweep) ·BeamPower-Triode
56R9
Compactron combining a high-mu audio voltage-amplifier triode with a beam-power pentode for power-amplifier service, using separate heater sections.
- Sections
- 2
- Base
- E12-70
- Socket code
- B12C
- Base pins
- 12
- Nominal heater
- 56 V / 150 mA
Description
The 56R9 is a Compactron containing a high-mu triode for audio-frequency voltage amplification and a beam-power pentode for power-amplifier service, with separate heaters.
Socket description
Duodecar 12-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- E12-70
- Socket code
- B12C
- Base pins
- 12
- Nominal heater voltage
- 56 V
- Nominal heater current
- 150 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
E12-70 - Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
2 physical sections, each with unique specifications.
Section 1
Beam Power
- Plate resistance
- 10000 Ω
- Transconductance
- 0.0075 S
- Max plate voltage
- 150 V
- Max screen voltage
- 135 V
- Max plate dissipation
- 6.5 W
- Max screen dissipation
- 1.8 W
- Max cathode current
- 65 mA
- Rectifier max heater-cathode voltage
- 200 V
Beam-power pentode section.
Section 2
Triode
- Plate resistance
- 55500 Ω
- Transconductance
- 0.0018 S
- Amplification factor
- 100
- Max plate voltage
- 150 V
- Max plate dissipation
- 1 W
- Rectifier max heater-cathode voltage
- 200 V
High-mu triode section.
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.