6LM8
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BrandRCA
ClassMedium-Mu Triode — Semiremote-Cutoff Pentode
BaseSmall-Button Noval 9-Pin
Filament6.3V @ 0.45mA
Construction
Primary TypeMultiunit Triode-Pentode
EnvelopeT6-1/2
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesRCA Dark Heater
Absolute Maximum Ratings
Plate Voltage350 V
Plate Dissipation2.5 W
Grid 2 Voltage330 V
H-C Voltage200 V
Audio Performance
Key Features
- Dark Heater
- Internal Shield
- Separate Cathode Connections
- Semiremote-cutoff pentode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Unit - Class A1 Amplifier | 125V | 8500 | 5400 | 46 | 13.5mA |
| Pentode Unit - Class A1 Amplifier | 125V | 6000 | 150000 | - | 12mA |
Application Notes
The pentode unit is particularly suited for use in the burst-amplifier circuit of color-TV receivers. The triode unit may be used as a general-purpose amplifier.
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