Tube-number record
NEON TUNING INDICATOR
0 archive entries
NEON TUNING INDICATOR is a tube type in the TubeDatabase archive (class: Indicator Tube). Recorded specifications: brand G.E.C., construction Other / special, socket 4-pin, and maximum plate voltage 180 V. The archive does not yet hold a photographed example of this type.
BrandG.E.C.
ClassIndicator Tube
Base4-pin
Construction
Primary TypeOther / special
EnvelopeGlass
Sections3-electrode
Filament / Heater
Absolute Maximum Ratings
Plate Voltage180 V
Cathode Current1.4 mA
Audio Performance
Key Features
- Neon-filled
- Visual indication of correct tuning point
- Luminous glow on long electrode
- Three electrodes
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Glow Commencement | 165 V | — | — | — | 0.15 mA |
| Normal Operation | 180 V | — | — | — | 1.4 mA |
Application Notes
Correct tuning is indicated when the luminous glow on the long electrode is of maximum length. Used in A.V.C. receivers.
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