Tube-number record
7489
0 archive entries
BrandBrimar
ClassLow-mu double triode
BaseNoval (B9A)
Filament12.6 V @ 0.15 mA
Construction
Primary TypeDual triode
EnvelopeT6-1/2
Sections2
Filament / Heater
Heater NotesPin 9 is heater centre tap for series or parallel operation.
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation3 W
Cathode Current20 mA
H-C Voltage200 V
Audio Performance
Key Features
- Low catastrophic failure rate
- Special alloy cathode sleeve to inhibit interface resistance
- Pure tungsten heater
- Rugged electrode construction
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Each Section | 250 V | 2200 | 7700 | 17 | 10.5 mA |
Datasheets
Datasheet: 7489.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results