Tube-number record
7543
0 archive entries
7543 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Sylvania, construction Pentode, socket Miniature 7-pin (B7G), maximum plate voltage 300 V, and maximum plate dissipation 3 W. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassPentode
BaseMiniature 7-pin (B7G)
Filament6.3 V @ 300 mA
Construction
Primary TypePentode
EnvelopeT-5 1/2
SectionsSingle
Filament / Heater
Heater NotesHelical wound heater
Absolute Maximum Ratings
Plate Voltage300 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Connected | 250 V | 4800 | — | 36 | 12.2 mA |
| Pentode Connected (100V G2) | 100 V | 3900 | 500000 | — | 5 mA |
| Pentode Connected (125V G2) | 250 V | 4500 | 1500000 | — | 7.6 mA |
Application Notes
The hum level at the plate averages 1.2 millivolts when used as a normal voltage amplifier with a stage gain of 340 and the 6.3 Vac heater supply balanced to ground.
Datasheets
Datasheet: 7543.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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