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
12.6 V
Heater Current
100 mA
DisplaySystems
2
DifferentSensitivity
Tuning Indicator ·TuningIndicator
UM4
Series-heater electron-ray tuning indicator incorporating two display systems of different sensitivity for useful indication across weak and strong signal conditions.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- IO
- Base pins
- -
- Nominal heater
- 12.6 V / 100 mA
Description
Series-heater tuning indicator with two display systems of different sensitivity.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- IO
- Base pins
- -
- Nominal heater voltage
- 12.6 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.