Tube-number record
35W4
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BrandBrimar
ClassRectifier
BaseMiniature 7-pin (B7G)
Filament35 V @ 150 mA
Construction
Primary TypeRectifier
Rectifier TypeIndirectly heated
EnvelopeT53
Base MaterialGlass
Sections1
Filament / Heater
Heater NotesHeater tap provided for dial lamp between pins 4 and 6. Lamp section voltage nominal 5.5V-7.5V.
Absolute Maximum Ratings
Plate Voltage250 V
Cathode Current100 mA
H-C Voltage330 V
Audio Performance
Key Features
- Miniature construction
- Heater tap for dial lamp
- Indirectly heated cathode
- Intended for AC/DC series operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Half-Wave Rectifier (no lamp) | 250 V | — | 100 | — | 75 mA |
| Half-Wave Rectifier (no lamp) | 250 V | — | 100 | — | 100 mA |
| Half-Wave Rectifier (no lamp) | 117 V | — | 15 | — | 75 mA |
Application Notes
When DC output exceeds 60mA, a shunting resistor across the lamp is required. Suggested values: 800 ohms for 70mA, 400 ohms for 80mA, 250 ohms for 90mA.
Datasheets
Datasheet: 35W4.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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