E1T
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BrandPHILIPS
ClassDecade Counter Tube
BaseDuodecal 12-pin
Filament6.3V @ 300mA
Construction
Primary TypeDecade Counter
EnvelopeGlass
Base MaterialGlass/Plastic
SectionsSingle
Filament / Heater
Heater NotesIndirect by A.C. or D.C.; series or parallel supply
Absolute Maximum Ratings
Plate Voltage400 V
Audio Performance
Key Features
- Special Quality (SQ)
- Long life (> 10,000 hours)
- High reliability
- Decade counter with luminescent spot reading
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| standard operation (max 30,000 counts/sec) | 300V | - | - | - | 0.95mA |
Application Notes
The circuit diagram specifies 1% precision resistors for the voltage divider to maintain the ratio of g1 and D supply voltages. Magnetic fields must not exceed 2 Gauss to avoid upsetting the electron beam operation.
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