Tube-number record
12 QR 51
0 archive entries
12 QR 51 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand TESLA, construction Display / CRT, socket Noval (B9A), and maximum plate voltage 2200 V. The archive does not yet hold a photographed example of this type.
BrandTESLA
ClassCathode Ray Tube
BaseNoval (B9A)
Filament6.3 V @ 0.7 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesIndirect heating, oxide cathode
Absolute Maximum Ratings
Plate Voltage2200 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 1500V Anode 3 | 1500 V | — | — | — | — |
| 3000V Anode 3 | 1500 V | — | — | — | — |
| 4000V Anode 3 | 2000 V | — | — | — | — |
Application Notes
Intended for use in high-performance oscillographs. For cathode protection, it is recommended to insert a resistor of approximately 200 kOhm into the cathode lead. Shielding from electrostatic fields with aluminum and electromagnetic fields with soft magnetic material is recommended.
Datasheets
Datasheet: 12QR51.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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