Tube-number record
H.L.A.2
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BrandBrimar
ClassTriode
Base5-pin
Filament4 V @ 1000 mA
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
Heater Notes4 volts +/- 5%
Absolute Maximum Ratings
Plate Voltage200 V
Audio Performance
Key Features
- Robust construction
- Interlocked electrode system
- Low noise level
- Non-microphonic
- Negligible frequency drift at ultra high frequencies
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| L.F. Amplifier | 100 V | — | — | — | 3 mA |
| L.F. Amplifier | 150 V | — | — | — | 5 mA |
| L.F. Amplifier | 200 V | — | — | — | 6 mA |
| Characteristics at Zero Bias | 100 V | 5500 | 9000 | 50 | — |
Application Notes
Can be used as a detector, low frequency amplifier, or oscillator in superheterodynes. For L.F. amplifier, automatic bias may be obtained by a resistance of approximately 400 ohms in the cathode lead.
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