Tube-number record
6GJ7
0 archive entries
6GJ7 is a tube type in the TubeDatabase archive (class: Medium-Mu Triode—Sharp-Cutoff Pentode). Recorded specifications: brand RCA, year 1965, construction Multi-section, base Small-Button Noval 9-Pin, socket Noval (B9A), maximum plate voltage 275 V, and maximum plate dissipation 2.4 W. The archive does not yet hold a photographed example of this type.
BrandRCA
ClassMedium-Mu Triode—Sharp-Cutoff Pentode
BaseNoval (B9A)
Filament6.3 V @ 410 mA
Construction
Primary TypeMulti-section
EnvelopeT6-1/2
Base MaterialSmall-Button Noval 9-Pin
Sections2
Filament / Heater
Heater Notes6.3V +/- 0.6V
Absolute Maximum Ratings
Plate Voltage275 V
Plate Dissipation2.4 W
Grid 2 Voltage275 V
Grid 1 Voltage-50 V
Cathode Current22 mA
H-C Voltage110 V
Audio Performance
Key Features
- Sharp-cutoff pentode section
- Medium-mu triode section
- Coated unipotential cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Unit | 100 V | 9000 | — | 20 | 15 mA |
| Pentode Unit | 170 V | 11000 | 350000 | 55 | 10 mA |
Application Notes
The hum should be minimized in intercarrier receiver applications by limiting the heater-cathode voltage to 100 volts rms.
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