Tube-number record
D 7-221 GY
0 archive entries
D 7-221 GY is a tube type in the TubeDatabase archive (class: Oscilloscope Tube). Recorded specifications: brand Valvo, construction Beam tetrode / beam power, socket CRT base (B12 family), and maximum plate voltage 2200 V. The archive does not yet hold a photographed example of this type.
BrandValvo
ClassOscilloscope Tube
BaseCRT base (B12 family)
Filament6.3 V @ 100 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeGlass, rectangular
Sections1
Filament / Heater
Heater NotesSparheizkatode (Low-power heater)
Absolute Maximum Ratings
Plate Voltage2200 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 1000 V | — | — | — | 0.01 mA |
Application Notes
Designed for low-cost oscilloscopes and display units.
Datasheets
Datasheet: D7-221GY.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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