Tube-number record
35HB8
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BrandTung-Sol
ClassTriode-Pentode Miniature Type
BaseNoval (B9A)
Filament35 V @ 0.15 mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Base MaterialMiniature Button
Sections2
Filament / Heater
Heater NotesCoated Unipotential Cathode
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation6.5 W
Grid 2 Voltage135 V
Cathode Current50 mA
H-C Voltage200 V
Audio Performance
Typical THD8%
Power Output1 W
Key Features
- Miniature construction
- Triode-pentode combination
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 115 V | 3900 | — | 74 | 2.5 mA |
| Pentode Section | 115 V | 6250 | — | — | 33 mA |
Application Notes
Designed for audio applications in stereo and monaural sound equipment. The heater should be connected with pin #4 closest to the ground end of the heater string.
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