Tube-number record
240N
0 archive entries
240N is a tube type in the TubeDatabase archive (class: Alpha-Beta Gamma Counter Tube). Recorded specifications: brand Amperex, construction Other / special, base Standard Peewee 3 Pin, socket 3-pin / Peewee, and maximum plate voltage 900 V. The archive does not yet hold a photographed example of this type.
BrandAmperex
ClassAlpha-Beta Gamma Counter Tube
Base3-pin / Peewee
Construction
Primary TypeOther / special
EnvelopeProbe tube with mica window
Base MaterialStandard Peewee 3 Pin
Filament / Heater
Absolute Maximum Ratings
Plate Voltage900 V
Audio Performance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Radiation Counting | 875 V | — | — | — | — |
Application Notes
Sensitive to Gamma radiation at tolerance dosage levels. Mica window provides Alpha and Beta sensitivity.
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