Voltage - Triode (with diode, heptode or hexode) ·Hexode-Triode
ECH84A
Triode-hexode combination developed primarily for television synchronizing-pulse separation and amplification. Its multi-grid section processes sync pulses while the triode provides an associated amplification or pulse-processing stage.
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 6.3 V / -
Description
Triode-heptode frequency-converter tube.
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
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- -
- 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
2 physical sections, each with unique specifications.
Section 1
Triode
- Transconductance
- 0.0055 S
- Amplification factor
- 35
- Max plate dissipation
- 1.5 W
- Max cathode current
- 15 mA
Section 2
Hexode
- Transconductance
- 0.0022 S
- Max plate voltage
- 250 V
- Max screen voltage
- 250 V
- Max plate dissipation
- 1.7 W
- Max cathode current
- 12.5 mA
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.