Tube-number record
LINEAR LIGHT SOURCE
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BrandFerranti
ClassNeon-filled Tube
BaseOctal
Filament6.3 V @ 1500 mA
Construction
EnvelopeEnd viewing, circular aperture 4.0 mm diameter
SectionsNeon filled
Filament / Heater
Warm-up Time60s
Heater NotesSuitable parallel operation only, AC or DC
Absolute Maximum Ratings
Plate Voltage400 V
Grid 1 Voltage400 V
Cathode Current40 mA
Audio Performance
Key Features
- Neon filled
- End viewing
- Linear light output proportional to anode current
- Modulatable
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Modulated light source | 400 V | — | — | — | 40 mA |
Application Notes
The trigger electrode should be connected to anode via a resistor—20 kOhms is the minimum value. Tubes must be run with heater volts only applied for a period of at least one minute before application of H.T. voltage.
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