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Tube-number record
7058
1 archive entry
BrandSylvania
ClassHigh Mu Twin Triode
BaseNoval (B9A)
Filament13.5 V @ 155 mA
Construction
Primary TypeDual triode
EnvelopeT6-1/2
Sections2
Filament / Heater
Heater NotesDesigned for operation over a 12-15 Volt range for mobile communications equipment.
Absolute Maximum Ratings
Plate Voltage580 V
Plate Dissipation1 W
Grid 1 Voltage-55 V
H-C Voltage120 V
Audio Performance
Key Features
- Miniature high mu twin triode
- Separate cathodes
- Intended for mobile communications equipment
- Dependable operation over wide heater voltage range
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier (Each Section) | 250 V | 1650 | 61000 | 100 | 1.2 mA |
Application Notes
The Type 7058 is similar to the 12AX7 except for heater characteristics.
Datasheets
Datasheet: 7058.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.