Tuning Indicator ·Triode-TuningIndicator
HM85
Magic-fan fluorescent tuning indicator providing a fan-shaped visual response to receiver control voltage for tuning and signal-strength observation.
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- -
- Nominal heater
- 12.6 V / 150 mA
Description
Magic-fan tuning indicator 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
- -
- Nominal heater voltage
- 12.6 V
- Nominal heater current
- 150 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
2 physical sections, each with unique specifications.
Section 1
Tuning Indicator
No fixed ratings are recorded for this section.
Section 2
Triode
No fixed ratings are recorded for this 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.