1B8GT
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BrandHytron
ClassTriple-purpose diode-triode and beam pentode
BaseOctal
Construction
Primary TypeDiode-Triode-Pentode
EnvelopeT9-C
Base MaterialWafer base with metal sleeve
SectionsTriple-Purpose
Filament / Heater
MaterialFilament type
Absolute Maximum Ratings
Plate Voltage90 V
Grid 2 Voltage90 V
Audio Performance
Typical THD8.5%
Power Output0.21 W
Key Features
- Filament type
- Triple-purpose
- Diode-triode detector audio amplifier
- Output Beam Pentode
- Internal shielding via metal sleeve
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section Class A (90V) | 90V | 1150 | - | - | 6.5mA |
| Pentode Section Class A (67.5V) | 67.5V | 900 | - | - | 4.2mA |
| Pentode Section Class A (62.5V) | 62.5V | 850 | - | - | 4.1mA |
| Pentode Section Class A (45V) | 45V | 750 | - | - | 2.28mA |
| Triode Section Class A | 90V | 275 | 240000 | - | 0.15mA |
Application Notes
Primary purpose is for conservation of space in portable compact receivers. Electrically consists of a 1H5GT and a 1T5GT mounted side by side.
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