Tube-number record
38HK7
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BrandGeneral Electric
ClassCompactron Diode-Pentode
BaseCompactron
Filament37.8 V @ 0.45 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeT-12 Glass
Base MaterialButton 12-Pin
Sections2
Filament / Heater
Warm-up Time11s
Heater NotesHeater Warm-up Time: 11 Seconds
Absolute Maximum Ratings
Plate Voltage3700 V
Cathode Current200 mA
H-C Voltage3700 V
Audio Performance
Key Features
- Compactron
- High-perveance diode
- Beam-power pentode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section | 130 V | 8800 | 6200 | 4.2 | — |
Application Notes
The diode is intended for service as the damping diode and the pentode as the horizontal-deflection amplifier in television receivers.
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