7A7
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BrandSylvania
ClassRemote Cut-off RF Pentode
BaseLock-In 8 Pin
Filament7V @ 320mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesNominal ratings; Typical operation often uses 6.3V.
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation4 W
Grid 2 Voltage125 V
H-C Voltage90 V
Audio Performance
Key Features
- Remote cut-off
- Single-ended
- Internal shield
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF/IF Service (Condition 1) | 100V | 2350 | 120000 | - | 13mA |
| RF/IF Service (Condition 2) | 250V | 2000 | 800000 | - | 9.2mA |
Application Notes
Designed for RF or IF service in AC or DC receivers. Electrical characteristics are similar to the older types 6K7GT and 6SK7GT. Type 14A7 or 7B7 may be more suitable for AC-DC service due to lower heater current.
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