HL.133DD
0 Tubes in archive
BrandMazda
ClassDouble Diode Triode
BaseBritish Octal
Filament13V @ 0.2mA
Construction
Primary TypeIndirectly Heated Double Diode Triode
EnvelopeSmall, Metallised
SectionsTriode, 2 Diodes
Filament / Heater
Heater NotesA.C./D.C. Mains
Absolute Maximum Ratings
Plate Voltage250 V
Audio Performance
Typical THD2.5%
Key Features
- Metallised bulb
- Common cathode sleeve
- British Octal Base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Conditions | 100V | 2500 | 12800 | 32 | - |
| Resistance Coupled, 165V HT | 165V | - | - | - | 1.25mA |
| Resistance Coupled, 185V HT | 185V | - | - | - | 1.45mA |
Application Notes
The HL.133DD is recommended for performing the simultaneous functions of A.V.C., detection and amplification. When the valve is used for detection, only D2 (pin No. 5) should be used. The control grid should be biased by means of a self-bias resistance by-passed with a condenser of 25-50 mFd.
Datasheet Viewer
Loading datasheet...
Sort by
Showing 1 to 0 of 0 results