Antique radios, Old Time Radios
AC-40
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Country:
United States of America (USA)
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| Identical to |
AC-40
= SO-1
= 40_Arcturus
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| First year |
Dec.1928
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| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 15 Volts / If 0.4 Ampere / Half indirect / Specified voltage AC/DC |
| Description |
Not to be confused with the common (Raytheon) tube 40 with a 5 volt heater. The Arcturus AC40 is one of the 7 first tubes developed by Arcturus for 15 volts series. The early production of the AC40 (and AC30) had a clear, tipped bulb, later productions had blue bulbs. The manufacturer chose 15 volts because of the availability of transformers operating at this voltage, for use in toy trains.
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Dimensions (WHD)
incl. pins / tip |
x 123 x 45 mm / x 4.84 x 1.77 inch |
| Weight |
49 g / 1.73 oz |
| Information source |
Taschenbuch zum Röhren-Codex 1948/49
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AC-40: Tabu Röhren-Codex, 1948
Anonymous 15 Collector
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Just Qvigstad
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Collection of
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