Tube-number record
HP 1118
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BrandTungsram
ClassRF Pentode
Base6-pin
Filament10 V @ 0.18 mA
Construction
Primary TypePentode
EnvelopeDOM - metalized
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated, bifilar heater for low hum, AC/DC series
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage125 V
Grid 1 Voltage-3 V
Audio Performance
Key Features
- Vari-Mu characteristic
- Exponential characteristic
- Metallized envelope for shielding
- High transconductance
- Suitable for AVC (Automatic Volume Control)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 180 V | 1100 | 1000000 | 1100 | 7 mA |
| Typical Operation | 250 V | 1450 | 800000 | 1160 | 10.5 mA |
Application Notes
Commonly used as a volume control tube in high-frequency stages or as an RF/IF amplifier.
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