Tube-number record
6661/6BH6
0 archive entries
6661/6BH6 is a tube type in the TubeDatabase archive (class: Sharp cut-off pentode). Recorded specifications: brand Sylvania, construction Pentode, socket Miniature 7-pin (B7G), maximum plate voltage 330 V, and maximum plate dissipation 3.3 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassSharp cut-off pentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 150 mA
Construction
Primary TypePentode
EnvelopeT-5 1/2
Sections1
Filament / Heater
Heater NotesDesigned specifically for use in mobile communications equipment. Capable of withstanding appreciable on-off cycling.
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation3.3 W
Grid 2 Voltage330 V
Grid 1 Voltage-55 V
H-C Voltage100 V
Audio Performance
Key Features
- Mobile operation
- Sharp cut-off
- High reliability
- Consistent electrical characteristics
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 100 V | 3400 | 700000 | — | 3.6 mA |
| Class A1 Amplifier | 250 V | 4600 | 1400000 | — | 7.4 mA |
Application Notes
Specifically designed for mobile operation with supply voltage variations as encountered with automotive electrical systems.
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