12J7GT
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BrandArcturus
ClassPentode Detector Amplifier
BaseOctal
Filament12.5V @ 150mA
Construction
Primary TypePentode
EnvelopeGT
SectionsSingle
Filament / Heater
Heater NotesDesigned for series heater operation in AC-DC receivers
Absolute Maximum Ratings
Grid 2 Voltage125 V
H-C Voltage90 V
Audio Performance
Key Features
- Midget type
- Designed for series heater operation
- Eliminates need for plug-in resistors or line cords
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 100V | 1185 | 1000000 | 1185 | 2mA |
| Typical Operation | 250V | 1225 | 1500000 | 1500 | 2.1mA |
Application Notes
Type 12J7GT is designed primarily for series heater operation in AC-DC receivers. Only half the heater power for the entire receiver is required compared to designs using 0.3 ampere types.
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