Tube-number record
TRIPLE-GRID DETECTOR AMPLIFIER
0 archive entries
TRIPLE-GRID DETECTOR AMPLIFIER is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: construction Pentode, socket 6-pin, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
ClassPentode
Base6-pin
Filament6.3 V @ 0.3 mA
Construction
Primary TypePentode
EnvelopeST-12
Sections1
Filament / Heater
Heater NotesIndirectly heated cathode
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage100 V
Audio Performance
Key Features
- Triple-grid construction
- Detector or Amplifier capability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Amplifier | 250 V | 1250 | 1500000 | 1500 | 2.3 mA |
Application Notes
The OCR text appears to represent the plate characteristic curves for a Type 77 tube, showing grid voltage steps and plate current readings.
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