7B7
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BrandSylvania
ClassVariable-mu pentode
BaseLoktal
Filament7V @ 160mA
Construction
Primary TypePentode
EnvelopeT9-G
Base MaterialMetal
SectionsSingle
Filament / Heater
Heater NotesNominal 7.0V for 130V line service, 6.3V standard operation
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage100 V
Grid 1 Voltage-3 V
Audio Performance
Key Features
- Loktal base
- Variable-mu (pente variable)
- Single-ended (no grid cap)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF/IF Amplifier | 250V | 1700 | 700000 | 1200 | 8.5mA |
Application Notes
Sylvania type 7B7 is a triple-grid remote cut-off amplifier suitable for HF or MF service in AC, universal, or automotive receivers.
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