4HA7
0 Tubes in archive
BrandGeneral Electric
ClassCompactron Dissimilar Double Triode
BaseDuodecar
Filament4.2V @ 600mA
Construction
Primary TypeDissimilar Double Triode
EnvelopeT-9
Base MaterialGlass
Sections2
Filament / Heater
Warm-up Time11s
Heater NotesHeater voltage for a bogey tube at If = 600 mA
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation2.75 W
Grid 1 Voltage-50 V
Cathode Current20 mA
H-C Voltage200 V
Audio Performance
Key Features
- Compactron design
- Dissimilar triode sections
- Coated unipotential cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Section 1 (Medium-Mu Triode) | 250V | 2200 | 7700 | 17 | 10.5mA |
| Section 2 (High-Mu Triode) | 250V | 1600 | 62500 | 100 | 1.2mA |
Datasheet Viewer
Loading datasheet...
Sort by
Showing 1 to 0 of 0 results