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

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Tube-number record

7 CM ELECTROSTATIC TUBE FOR OSCILLOGRAPHY

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BrandMINIWATT-DARIO
ClassCathode Ray Tube
BaseLoctal
Filament6.3 V @ 0.4 mA

Construction

Primary TypeDisplay / CRT
EnvelopeGlass
Sections1

Filament / Heater

Absolute Maximum Ratings

Plate Voltage1000 V
Grid 2 Voltage400 V
Grid 1 Voltage-100 V

Audio Performance

Key Features
  • Symmetrical deflection for plates d1/d'1
  • Asymmetrical deflection for plates d2/d'2

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical Operation800 V———0.1 mA

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