TubeDatabase
  • Tubes
  • Testers
  • Companies
  • Submit
  • About

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)
DisclaimerA–Z indexSubmit a tube
8BA8A vacuum tube outline illustration

Tube-number record

8BA8A

0 archive entries

8BA8A is a tube type in the TubeDatabase archive (class: Triode Pentode). Recorded specifications: brand Tung-Sol, year 1956, construction Multi-section, base Glass, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 3.25 W. The archive does not yet hold a photographed example of this type.

BrandTung-Sol
ClassTriode Pentode
BaseNoval (B9A)
Filament8.4 V @ 450 mA

Construction

Primary TypeMulti-section
EnvelopeGlass
Base MaterialGlass
Sections2

Filament / Heater

Warm-up Time11s
Heater NotesAC or DC

Absolute Maximum Ratings

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Triode Section (Class A1 Amplifier)200 V27006700188 mA
Pentode Section (Class A1 Amplifier)200 V6000400000—13 mA

Application Notes

Heater warm-up time is defined as the time required for voltage to reach 80% of rated value after applying 4 times rated voltage in series with a resistor 3 times nominal operating resistance.

Filters

0 tubes found

Manufacturers

Brands

    0 results
    Plate Voltage300 V
    Plate Dissipation3.25 W
    Grid 2 Voltage300 V
    Grid 1 Voltage-50 V
    H-C Voltage200 V

    Audio Performance

    Key Features
    • Controlled plate knee characteristic
    • Controlled heater warm-up
    • Minimized heater voltage surges