Antique radios, Old Time Radios
CV1728
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Country:
United States of America (USA)
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| Identical to |
CV1728
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| Similar
Tubes |
Normally replaceable-slightly different:
262B
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| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX)
Top contact with a cap.
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| Was used by |
Military and/or Government |
| Filament |
Vf 10 Volts / If 0.32 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Low-noise audio preamplifier; mu 15, Gm 0.6 to 1.2mS. Silvered pins.
Ultra low-noise variant of 262A, with increased insulation between heater and cathode and internal hum shield. Later production in ST12 bulb.
Also made by STC.
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Dimensions (WHD)
incl. pins / tip |
x 118 x 38 mm / x 4.65 x 1.50 inch |
| Weight |
36 g / 1.27 oz |
| Information source |
Babani, International Radio Tube Encyclopaedia p. 78 & 79
Universal Vade-Mecum, Electron Valves and Semiconductor Devices p. 36
-- Original prospect or advert
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CV1728
Anonymous 10 Collector
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Just Qvigstad
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