7AJ7
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BrandSylvania
ClassSharp Cut-off RF Pentode
BaseLock-In 8-Pin
Filament7V @ 0.32mA
Construction
Primary TypePentode
EnvelopeT-3
SectionsSingle
Filament / Heater
Heater NotesNominal rating 7.0V/0.32A; Typical operation at 6.3V/0.3A
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1 W
Grid 2 Voltage100 V
H-C Voltage90 V
Audio Performance
Key Features
- Sharp Cut-off
- Triple grid amplifier
- Lock-In base
- Internal Shield
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 100V | 2275 | 400000 | - | 5.7mA |
| Class A1 Amplifier | 250V | 1575 | 1000000 | - | 2.2mA |
Application Notes
Designed specially for use in AC receivers and in the first stages of high gain amplifiers. Electrical characteristics are almost identical to Type 6SJ7 and identical with Sylvania Type 14C7 except for heater rating.
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