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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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Tube-number record

958-A

0 archive entries

BrandRCA
ClassAmplifier Triode
Base5-pin

Construction

Primary Type
Triode
EnvelopeAcorn (T-44)
SectionsSingle

Filament / Heater

MaterialCoated

Absolute Maximum Ratings

Plate Voltage135 V
Plate Dissipation0.6 W
Grid 1 Voltage-30 V
Cathode Current7 mA

Audio Performance

Power Output0.6 W
Key Features
  • Acorn type
  • UHF performance up to 350 MHz
  • Coated filament
  • Compact design

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A Amplifier135 V120010000123 mA
Class C Telegraphy135 V———7 mA

Application Notes

R-F grounding by means of condensers placed close to the tube pins is required for full UHF capabilities. Horizontal operation permitted if plane of electrodes is vertical.

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