Tube-number record
19A3
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ClassRectifier
BaseMiniature 7-pin (B7G)
Filament19 V @ 0.15 mA
Construction
Primary TypeVacuum
Rectifier Typehalf-wave
EnvelopeMiniature
Base MaterialGlass
Sections1
Filament / Heater
Heater Notes19V without panel lamp, 17V with panel lamp
Absolute Maximum Ratings
Plate Voltage350 V
Cathode Current70 mA
H-C Voltage350 V
Audio Performance
Key Features
- Half-wave vacuum rectifier
- Miniature 7-pin type
- Suitable for transformer-less radio receivers
- Compatible with panel lamp operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Capacitor Input Filter (100V Supply) | 100 V | — | 25 | — | 70 mA |
| Capacitor Input Filter (127V Supply) | 127 V | — | 40 | — | 70 mA |
Application Notes
Used in FM/AM radio receivers. Heater voltage allows for transformer-less operation.
Datasheets
Datasheet: 19A3.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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