Tube-number record
3J/187E, 3JC/187E
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BrandSTC
ClassIndustrial Triode
Construction
Primary TypeTriode
EnvelopeGlass/metal (3J/187E) or Ceramic/metal (3JC/187E)
Base MaterialMetal
Sections1
Filament / Heater
MaterialThoriated-tungsten
Absolute Maximum Ratings
Plate Voltage6500 V
Plate Dissipation3000 W
Grid 1 Voltage-1500 V
Cathode Current2000 mA
Audio Performance
Power Output12000 W
Key Features
- Forced-Air-Cooled
- High mutual conductance
- Large safety factor
- Industrial heating application
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Characteristics | 2000 V | 22000 | — | 12 | 250 mA |
| Class C R.F. Oscillator (Max Anode) | 6500 V | — | — | — | 1800 mA |
| Class B A.F. Power Amplifier | 5000 V | — | — | — |
Application Notes
Specifically designed for industrial heating applications. Surge peak filament current should be limited to 2.5 times the normal r.m.s. value.
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