Voltage - Triode (with diode, heptode or hexode) ·Diode-Diode-Triode
GT-envelope double-diode high-mu triode for detector, AVC, and audio voltage-amplifier service. Its paired diodes perform signal and control-voltage rectification while the triode provides substantial gain for the recovered audio signal.
Double-diode triode for detection, AVC, and audio voltage amplification.
International Octal
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
3 physical sections, each with unique specifications.
Section 1
No fixed ratings are recorded for this section.
Promoted from printed maximum/characteristic columns; additional published values retained in TUBE_SECTION_PARAMETER. The chart identifies the repeated detector-diode section(s) but does not publish separate diode electrical ratings on this row.
Section 2
No fixed ratings are recorded for this section.
Second physical diode section added in approved section-structure reconciliation.
Section 3
Promoted from printed maximum/characteristic columns; additional published values retained in TUBE_SECTION_PARAMETER.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Input capacitance
4.2 pF
Section1
Output capacitance
3.4 pF
Section1
Grid-to-plate capacitance
0.8 pF
Section1
Plate voltage
250 V
ClassA
Control-grid voltage
-2 V
ClassA
Plate current
1.1 mA
ClassA
Plate resistance
85000 Ω
Section1
Transconductance
1175 µS
Section1
Amplification factor
100
Section1
Data set 02
Published operating points and test conditions from this source.
Application
Detector / AVC
Application
AF voltage amplifier