Tube-number record
307A
0 archive entries
BrandWestern Electric
ClassPentode
Base5-pin
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage500 V
Plate Dissipation15 W
Grid 2 Voltage300 V
Grid 1 Voltage7 V
Cathode Current60 mA
Audio Performance
Power Output9.1 W
Key Features
- Filamentary suppressor-grid pentode
- Moderate-power
- Radio-frequency power amplifier
- Suppressor-grid modulated amplifier
- Frequency multiplier
- Oscillator
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Audio | 200 V | — | — | — | 36.5 mA |
| Class A Audio | 250 V | — | — | — | 50 mA |
| Class A Audio (Maximum) | 300 V | — | — | — | 43 mA |
Application Notes
The 306A tube gives better performance in audio-frequency applications and is preferable except where filament characteristics preclude its use. Suppressor grid should not be driven more than 20V positive.
Datasheets
Datasheet: 307A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results