Tube-number record
1E7-GT
0 archive entries
1E7-GT is a tube type in the TubeDatabase archive (class: Twin Power Pentode). Recorded specifications: brand Radio Corporation of America, year 1949, construction Pentode, socket Octal, maximum plate voltage 135 V, and maximum plate dissipation 1.5 W. The archive does not yet hold a photographed example of this type.
BrandRadio Corporation of America
ClassTwin Power Pentode
BaseOctal
Construction
Primary TypePentode
EnvelopeT-9
Sections2
Filament / Heater
Absolute Maximum Ratings
Plate Voltage135 V
Plate Dissipation1.5 W
Grid 2 Voltage135 V
Audio Performance
Typical THD5.5%
Power Output0.575 W
Key Features
- Twin Power Pentode
- Directly Heated Cathode
- Class A1 Operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| AF Power Amplifier Class A1 (Single Unit) | 90 V | 1150 | 340000 | — | 3.8 mA |
| AF Power Amplifier Class A1 (Single Unit) | 135 V | 1425 | 260000 | — | 7.5 mA |
| Push-Pull AF Power Amplifier Class A1 (Both Units) | 135 V | — | — | — |
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