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Tube-number record
7247
1 archive entry
BrandGeneral Electric
ClassDissimilar Double Triode
BaseNoval (B9A)
Filament12.6 V @ 150 mA
Construction
Filament / Heater
Heater NotesSeries or parallel connection
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation3 W
Cathode Current22 mA
H-C Voltage100 V
Audio Performance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Section 1 (Low-level High-gain) | 100 V | 1250 | 80000 | 100 | 0.5 mA |
| Section 1 (Low-level High-gain) | 250 V | 1600 | 62500 | 100 | 1.2 mA |
| Section 2 (Cathode follower / Phase-inverter) | 100 V | 3100 | 6500 | 20 |
Datasheets
Datasheet: 7247.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.