Tube-number record
1AH4
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BrandTUNG-SOL
ClassPENTODE
BaseSubminiature
Construction
Primary TypePentode
EnvelopeT2x3 GLASS BULB
Base MaterialGLASS
SectionsSINGLE
Filament / Heater
MaterialCOATED
Absolute Maximum Ratings
Plate Voltage90 V
Grid 2 Voltage90 V
Cathode Current2 mA
Audio Performance
Key Features
- SUBMINIATURE TYPE
- COATED FILAMENT
- METALLIC SHIELD
- ANY MOUNTING POSITION
- FLEXIBLE LEADS
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| CLASS A, AMPLIFIER | 45 V | — | — | — | — |
| CLASS A, AMPLIFIER | 67.5 V | 750 | 2000000 | — | 0.75 mA |
Application Notes
THE 1AH4 IS A FILAMENT TYPE, FULLY SHIELDED, SUBMINIATURE PENTODE DESIGNED FOR SERVICE IN RF APPLICATIONS REQUIRING ECONOMY OF SPACE, WEIGHT, AND BATTERY DRAIN.
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