19A3
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ClassRectifier
Base7-Pin Miniature Button (E7-1)
Filament19V @ 0.15mA
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) | 100V | - | 25 | - | 70mA |
| Capacitor Input Filter (127V Supply) | 127V | - | 40 | - | 70mA |
Application Notes
Used in FM/AM radio receivers. Heater voltage allows for transformer-less operation.
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