Tube-number record
XCC 189 / 4ES8
0 archive entries
XCC 189 / 4ES8 is a tube type in the TubeDatabase archive (class: Double Triode). Recorded specifications: brand IBRAPE / MINIWATT, construction Dual triode, socket Noval (B9A), maximum plate voltage 130 V, and maximum plate dissipation 1.8 W. The archive does not yet hold a photographed example of this type.
BrandIBRAPE / MINIWATT
ClassDouble Triode
BaseNoval (B9A)
Filament4.5 V @ 600 mA
Construction
Primary TypeDual triode
EnvelopeGlass
Sections2
Filament / Heater
Warm-up Time11s
Heater NotesIndirect heating, series supply
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single Section | 90 V | 12500 | — | 34 | 15 mA |
Application Notes
The a-g-k system should be used as the input section with the cathode grounded, and the a'-g'-k' system as the grid-grounded stage. When used in cascode amplifiers, a voltage divider is required for the grid of the grounded-grid section to avoid exceeding the maximum plate voltage.
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