DOUBLE DIODE VARIABLE-MU PENTODE
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ClassReceiver Tube
BaseY8A
Filament19V @ 100mA
Construction
Primary TypeDouble Diode Pentode
EnvelopeGlass with steel base
Base MaterialSteel
Sections3
Filament / Heater
Heater NotesSeries heater string current
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2 W
Grid 2 Voltage125 V
Cathode Current15 mA
H-C Voltage100 V
Audio Performance
Key Features
- Remote cut-off pentode
- Double diode for detection and AVC
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section | 200V | 1800 | 1500000 | - | 5mA |
| Pentode Section (Low Voltage) | 100V | 1700 | 80000 | - | 5mA |
Application Notes
Commonly used as IF amplifier and detector in AC/DC radio receivers.
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