Tube-number record
E235L / 7751
0 archive entries
E235L / 7751 is a tube type in the TubeDatabase archive (class: beam power pentode). Recorded specifications: brand CBS Electronics, construction Beam tetrode / beam power, socket Octal, maximum plate voltage 250 V, and maximum plate dissipation 10 W. The archive does not yet hold a photographed example of this type.
BrandCBS Electronics
Classbeam power pentode
BaseOctal
Filament6.3 V @ 1200 mA
Construction
Primary TypeBeam tetrode / beam power
Envelopeglass
Sections1
Filament / Heater
Heater NotesCoated unipotential cathode
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation10 W
Grid 2 Voltage250 V
Cathode Current200 mA
H-C Voltage250 V
Audio Performance
Key Features
- Reliable
- Long life (over 10,000 hours)
- Free from interface formation
- Low internal resistance at zero grid bias
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 100 V | 14000 | 5000 | 5.6 | 100 mA |
Application Notes
Especially designed as a switching tube for pulsed equipment, as a pass tube in regulated power supplies, and other power tube applications (especially for low anode and screen grid voltages).
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