1H4GT
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BrandSylvania
ClassLow Mu Triode
BaseIntermediate Shell 7-pin
Construction
Primary Typetriode
EnvelopeGT
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage180 V
Cathode Current50 mA
Audio Performance
Typical THD6%
Power Output2.1 W
Key Features
- Low Mu Triode
- Intermediate Shell base
- GT style bulb
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 90V | 850 | 11000 | 9.3 | 2.5mA |
| Class A Amplifier | 135V | 900 | 10300 | 9.3 | 3mA |
| Class A Amplifier | 180V | 900 | 10300 | 9.3 | 3.1mA |
| Class B Amplifier (2 Tubes) | 157.5V | - | - | - | 1mA |
| Biased Detector | 90V | - | - | - |
Application Notes
Horizontal operation permitted if pins 2 and 7 are in vertical plane. DC resistance in the grid circuit should not exceed 2 megohms. May also be used as a grid leak detector with 45 volts plate supply.
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