244A
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BrandWestern Electric
ClassLow-power triode
BaseWestern Electric 141A
Filament2V @ 1600mA
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialMedium, five-pin type with bayonet pin
SectionsSingle
Filament / Heater
Heater NotesOperates on a voltage basis; reduction of hum by connecting cathode to center tap.
Absolute Maximum Ratings
Plate Voltage180 V
H-C Voltage90 V
Audio Performance
Power Output153 W
Key Features
- Indirectly heated cathode
- Low microphonic noise
- Suitable for audio-frequency voltage amplification
- Can be used as oscillator
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 90V | 630 | 15100 | 9.5 | 1.9mA |
| Typical Operation | 135V | 820 | 11800 | 9.7 | 3.8mA |
| Maximum Operating Condition | 180V | 820 | 11600 | 9.6 | 4.4mA |
Application Notes
The 244A tube may be mounted in any position. Hum reduction is usually achieved by connecting the cathode to a center tap on the heater transformer secondary.
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