Tube-number record
HL.133DD
0 archive entries
HL.133DD is a tube type in the TubeDatabase archive (class: Double Diode Triode). Recorded specifications: brand Mazda, construction Multi-section, socket Octal, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandMazda
ClassDouble Diode Triode
BaseOctal
Filament13 V @ 0.2 mA
Construction
Primary TypeMulti-section
EnvelopeSmall, Metallised
SectionsTriode, 2 Diodes
Filament / Heater
Heater NotesA.C./D.C. Mains
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Static Conditions | 100 V | 2500 | 12800 | 32 | — |
| Resistance Coupled, 165V HT | 165 V | — | — | — | 1.25 mA |
| Resistance Coupled, 185V HT | 185 V | — | — | — | 1.45 mA |
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.
Datasheets
Datasheet: HL133DD.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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