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Tube Database (7,341 tube types · 1,270 archive entries)

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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6528A vacuum tube outline illustration

Tube-number record

6528A

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6528A is a tube type in the TubeDatabase archive (class: Medium Mu Twin Power Triode). Recorded specifications: construction Triode, base Large wafer octal 8 pin with metal sleeve, socket Octal, maximum plate voltage 400 V, and maximum plate dissipation 30 W. The archive does not yet hold a photographed example of this type.

ClassMedium Mu Twin Power Triode
BaseOctal
Filament6.3 V @ 5 mA

Construction

Primary TypeTriode
EnvelopeT-16 Nonex
Base MaterialLarge wafer octal 8 pin with metal sleeve
SectionsTwin

Filament / Heater

Warm-up Time30s
Heater Notes6.3V +/- 10%

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Per Section—370002459—

Application Notes

Well suited for use as a pass tube in series regulated power supplies. Ceramic spacers used rather than mica for mechanical stiffness.

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    Absolute Maximum Ratings

    Plate Voltage400 V
    Plate Dissipation30 W
    Grid 1 Voltage-300 V
    Cathode Current300 mA
    H-C Voltage300 V

    Audio Performance

    Key Features
    • Ceramic spacers
    • Gold plated strap frame grids
    • Rugged construction
    • Continuous vibration resistant