Tube-number record
18040
0 archive entries
18040 is a tube type in the TubeDatabase archive (class: PENTODE). Recorded specifications: brand PHILIPS, construction Pentode, socket Loctal, maximum plate voltage 250 V, and maximum plate dissipation 4.5 W. The archive does not yet hold a photographed example of this type.
BrandPHILIPS
ClassPENTODE
BaseLoctal
Filament18 V @ 200 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirect heating, A.C. or D.C.; series or parallel supply
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Output valve | 210 V | 11000 | 300000 | 37 | 20 mA |
| Pre-amplifier | 210 V | 10000 | 400000 | — | 15 mA |
Application Notes
The end point of life is determined by: Ia min. 13 mA, Ig2 min. 3 mA, S min. 7.5 mA/V. Grid bias can be automatic or fixed.
Datasheets
Datasheet: 18040.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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