Tube-number record
35D5
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35D5 is a tube type in the TubeDatabase archive (class: Beam Power Tube). Recorded specifications: brand Marconi Italiana, construction Beam tetrode / beam power, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 9.5 W. The archive does not yet hold a photographed example of this type.
BrandMarconi Italiana
ClassBeam Power Tube
BaseNoval (B9A)
Filament35 V @ 150 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeT-6 1/2
Sections1
Filament / Heater
Heater NotesSeries string heating arrangement
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation9.5 W
Grid 2 Voltage250 V
H-C Voltage150 V
Audio Performance
Typical THD10%
Power Output4.8 W
Key Features
- 9 pin miniature type
- unipotential cathode
- intended for audio power amplifier service
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| A.F. Power Amplifier Class A1 | 110 V | 8000 | 18000 | — | 30 mA |
| A.F. Power Amplifier Class A1 | 170 V | 9500 | 20000 | — | 52 mA |
Application Notes
Intended especially for use in audio power amplifier service in broadcasting receivers using power-line autotransformer supply.
Datasheets
Datasheet: 35D5.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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