Tube-number record
HD22
0 archive entries
BrandOsram
ClassDouble Diode Triode
Base5-pin
Construction
Primary TypeMulti-section
EnvelopeGlass
Base MaterialPlastic
Sections3
Filament / Heater
Absolute Maximum Ratings
Plate Voltage150 V
Audio Performance
Key Features
- 2-volt Accumulator operation
- Separate filament system for diodes
- Triode fully shielded from diode system
- Automatic Volume Control application
- Carbonised bulb
- Optional metallisation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 150 V | — | — | 27 | 1.75 mA |
| Triode Section | 125 V | — | — | 27 | 2.3 mA |
| Triode Section | 100 V | 1500 | 18000 | 27 | 1.25 mA |
Application Notes
Designed primarily as a detector and affords an efficient means to effect Automatic Volume Control. Two diode anodes may be strapped for half-wave rectification if AVC is not used.
0 results