Tube-number record
7A7
0 archive entries
7A7 is a tube type in the TubeDatabase archive (class: Remote Cut-off RF Pentode). Recorded specifications: brand Sylvania, construction Pentode, socket Loctal, maximum plate voltage 300 V, and maximum plate dissipation 4 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassRemote Cut-off RF Pentode
BaseLoctal
Filament7 V @ 320 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesNominal ratings; Typical operation often uses 6.3V.
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF/IF Service (Condition 1) | 100 V | 2350 | 120000 | — | 13 mA |
| RF/IF Service (Condition 2) | 250 V | 2000 | 800000 | — | 9.2 mA |
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.
Datasheets
Datasheet: 7A7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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