7AN7
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BrandRogers Majestic Electronics Ltd.
ClassDouble Triode Cascode Amplifier
Base9-pin Noval
Filament7V @ 0.3mA
Construction
Primary TypeDouble Triode
EnvelopeT6-1/2
Base MaterialSmall button Noval
Sections2
Filament / Heater
Heater NotesSuitable for use in tuners up to 220 Mc
Absolute Maximum Ratings
Plate Voltage180 V
Plate Dissipation2 W
Grid 1 Voltage-50 V
Cathode Current18 mA
H-C Voltage90 V
Audio Performance
Key Features
- Low noise R.F. cascode amplifier
- Dual cathode leads for grounded grid section
- Internal shield on section 2
- High transconductance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Each section | 90V | 6000 | 4000 | 24 | 12mA |
Application Notes
Triode section No.1 should be used as grounded cathode amplifier and section No.2 as grounded grid amplifier. A noise figure of 5 can be obtained if the two cathode leads of section 2 are connected in parallel.
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