Tube-number record
189
0 archive entries
189 is a tube type in the TubeDatabase archive (class: Variable-mu RF Pentode). Recorded specifications: construction Pentode and maximum plate voltage 180 V. The archive does not yet hold a photographed example of this type.
ClassVariable-mu RF Pentode
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage180 V
Grid 2 Voltage90 V
Audio Performance
Key Features
- Variable Mu
- Super Control
- Battery Operated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier | 180 V | 950 | 650000 | 620 | 3.7 mA |
Application Notes
Specifically designed for use as a radio-frequency or intermediate-frequency amplifier in battery-operated receivers.
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