Tube-number record
CRI57
0 archive entries
CRI57 is a tube type in the TubeDatabase archive (class: Oscilloscope Tube). Recorded specifications: brand ETEL, construction Display / CRT, and socket CRT base (B12 family). The archive does not yet hold a photographed example of this type.
BrandETEL
ClassOscilloscope Tube
BaseCRT base (B12 family)
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsDual Trace
Filament / Heater
Heater NotesIndirectly heated - suitable for parallel operation only
Absolute Maximum Ratings
Audio Performance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operating Conditions | 4000 V | — | — | — | — |
Application Notes
The tube is designed for symmetrical operation on both x and y plates. Mounting position is unrestricted. Magnetic shielding is recommended.
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