Tube-number record
6LFB
0 archive entries
6LFB is a tube type in the TubeDatabase archive (class: High Mu Triode and Sharp Cutoff Pentode). Recorded specifications: construction Multi-section, socket Noval (B9A), maximum plate voltage 330 V, and maximum plate dissipation 3.75 W. The archive does not yet hold a photographed example of this type.
ClassHigh Mu Triode and Sharp Cutoff Pentode
BaseNoval (B9A)
Filament6.3 V @ 600 mA
Construction
Primary TypeMulti-section
EnvelopeT-6 1/2
Sections2
Filament / Heater
Heater NotesHeater-Cathode Voltage: 200V Max (Negative), 100/200V Max (Positive)
Absolute Maximum Ratings
Plate Voltage330 V
Plate Dissipation3.75 W
Grid 2 Voltage330 V
Grid 1 Voltage-55 V
H-C Voltage200 V
Audio Performance
Key Features
- High Mu Triode
- Sharp Cutoff Pentode
- Video Amplifier
- General Purpose Amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 200 V | 4000 | 17500 | 70 | 4 mA |
| Pentode Section | 100 V | 11000 | 200000 | — | 20 mA |
Application Notes
Commonly used in Color Television applications for video amplification.
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