Data set 01
1957 Philips Receiving and Amplifying Tubes
Published operating points and test conditions from this source.
SECTION 1
Sensor
Other
Maximum heater current
100 mA
Characteristics
Heater current for 12 mV output
40 mA
Specialized - Sensor Tube ·Sensor
TH3
Subminiature vacuum thermocouple current sensor for moderate low-current measurement. Heater current produces a small thermoelectric voltage proportional to electrical input.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- SUBMINIATURE
- Socket code
- -
- Base pins
- -
- Nominal heater
- -
Description
Thermocouple current-measuring device with maximum heater current of 100 mA.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- SUBMINIATURE
- Socket code
- -
- Base pins
- -
- Nominal heater voltage
- -
- Nominal heater current
- -
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
SUBMINIATURE - 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
Sensor
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Thermocouple measuring element; current ranges retained as parameters.
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.
Data set 02
1999 Philips E-Z
Published operating points and test conditions from this source.
SECTION 1
Sensor
Characteristics
Heater current range
0-75 mA
Approximate square-law proportional range
0-20 mA
Heater current at 12 mV output
40 mA
Heater resistance
7 ohm
Thermocouple resistance
3.5 ohm
Response time
10 sec
Other
Maximum heater current for 1 minute
100 mA
Maximum heater-to-thermocouple voltage
100 V