Tube-number record
7639
0 archive entries
7639 is a tube type in the TubeDatabase archive (class: Travelling wave tube amplifier). Recorded specifications: brand Mullard, construction Other / special, socket Special / none, maximum plate voltage 1850 V, and maximum plate dissipation 0.8 W. The archive does not yet hold a photographed example of this type.
BrandMullard
ClassTravelling wave tube amplifier
BaseSpecial / none
Filament6.3 V @ 400 mA
Construction
Primary TypeOther / special
EnvelopeGlass
Filament / Heater
Heater NotesRequired heater voltage range 6.0 to 9.0V, should be set to +/- 250mV of the value stated on tube for minimum noise factor.
Absolute Maximum Ratings
Plate Voltage1850 V
Plate Dissipation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Input amplifier with periodic permanent magnet system | 1700 V | — | — | — | 0.35 mA |
Datasheets
Datasheet: 7639.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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