Tube-number record
7189/7189A
0 archive entries
7189/7189A is a tube type in the TubeDatabase archive (class: Beam Power Pentode). Recorded specifications: brand Sylvania, construction Pentode, base Glass, socket Noval (B9A), maximum plate voltage 440 V, and maximum plate dissipation 13.2 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassBeam Power Pentode
BaseNoval (B9A)
Filament6.3 V @ 760 mA
Construction
Primary TypePentode
EnvelopeMiniature Button 9-Pin
Base MaterialGlass
SectionsSingle
Filament / Heater
Heater NotesMaximum Voltage Range: 5.7-6.9 Volts
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Pentode Single Tube | 250 V | 11300 | 40000 | 19.5 | 48 mA |
| Class AB1 Push-pull Pentode | 400 V | — | — | — | 15 mA |
| Class AB1 Push-pull Ultra-linear | 375 V | — | — | — |
Application Notes
The Types 7189 and 7189A are beam power pentode audio amplifiers designed for service in the output stage of high quality audio amplifiers.
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