Antique radios, Old Time Radios
CV740
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Country:
United States of America (USA)
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| Identical to |
CV740
= 2505A5
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| First Source
(s) |
Dec.1941 : Electron Tube Registration List
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| Base |
7-Pin-Base-general, old, USA
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| Filament |
Vf 2.5 Volts / If 2.1 Ampere / Half indirect |
| Description |
5" medium-persistance green fluorescent CRT intended for oscillographic applications. Electrostatic focus and deflection. The lower vertical and the right horizontal deflection plates tied to A2. Typical operation: 500V on A1, 1500V on A2, -80V grid cutoff.
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| Information source |
-- Original-techn. papers. Electronics, Jan. 1942
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