Data set 01
1957 Philips Receiving and Amplifying Tubes
Published operating points and test conditions from this source.
SECTION 1
Tuning Indicator
Characteristic
Heater Voltage
19 V
Heater Current
100 mA
Tuning Indicator ·TuningIndicator
UM81
Series-heater fluorescent tuning indicator for receiver applications, controlled by signal-derived voltage to provide an operator-visible aid to accurate tuning.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B9A
- Base pins
- -
- Nominal heater
- 19 V / 100 mA
Description
Series-heater tuning indicator.
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
- 19 V
- Nominal heater current
- 100 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
Tuning Indicator
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Published Philips ratings and characteristics promoted from the supplied source.
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.