Tube-number record
3 BVP
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3 BVP is a tube type in the TubeDatabase archive (class: Cathode-Ray Tube). Recorded specifications: brand Telefunken, construction Electrostatic deflection and focus, socket Magnal, maximum plate voltage 8000 V, and maximum plate dissipation 0.25 W. The archive does not yet hold a photographed example of this type.
BrandTelefunken
ClassCathode-Ray Tube
BaseMagnal
Filament6.3 V @ 300 mA
Construction
Primary TypeElectrostatic deflection and focus
Envelopeglass
Sectionssingle beam
Filament / Heater
Absolute Maximum Ratings
Plate Voltage8000 V
Plate Dissipation0.25 W
Grid 2 Voltage2300 V
Grid 1 Voltage-250 V
H-C Voltage180 V
Audio Performance
Key Features
- Three inch flat face
- Single beam
- Very high deflection sensitivity
- Small spot size
- Half heater power
- Transistorized oscilloscope suitable
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Post-Accelerator Operation | 1600 V | — | — | — | — |
Application Notes
The accelerator voltage is variable from 400 to 430 Volts to provide for astigmatism control. Low impedance deflection plate drive is recommended for full deflection.
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