Tube-number record
5702WA
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BrandTung-Sol
ClassSharp-cutoff Pentode
BaseSubminiature
Filament6.3 V @ 0.2 mA
Construction
Primary TypePentode
EnvelopeT-3 Glass
Base MaterialGlass
Sections1
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage165 V
Plate Dissipation1.1 W
Grid 2 Voltage155 V
Grid 1 Voltage-55 V
Cathode Current16.5 mA
H-C Voltage200 V
Audio Performance
Key Features
- Sharp-cutoff pentode
- High temperature operation
- High mechanical shock resistance
- High mechanical vibration resistance
- VHF region operation capability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 120 V | 5000 | 340000 | — | 7.5 mA |
Application Notes
The flexible terminal leads may be soldered or welded directly to circuit components without the use of sockets. Grid #3 can be connected directly to ground under self-bias conditions to omit the cathode by-pass capacitor for lower grid loading.
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