Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 2
Triode
Characteristic
TriodePlateResistance
8500 ohm
Section2
TriodeTransconductance
1900 uS
Section2
Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode
12SR7GT
GT-envelope double-diode triode for detector and audio-frequency amplifier service. Its paired diodes provide detection and control-voltage rectification while the medium-mu triode offers useful current-driving capability for subsequent receiver stages.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 3
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 12.6 V / 150 mA
Description
Two diodes and a medium-mu triode for detector, rectifier, and amplifier service.
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
- 8
- 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
3 physical sections, each with unique specifications.
Section 1
Diode
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Published promoted fields populated semantically; identical repeated sections compressed.
Section 2
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 8500 Ω
- Transconductance
- 0.0019 S
- Amplification factor
- 16
- Max plate voltage
- 250 V
- Max plate dissipation
- 2.5 W
Published promoted fields populated semantically; identical repeated sections compressed.
Section 3
Diode
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Added approved missing physical diode section row.
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.