Antique radios, Old Time Radios
DA4
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Country:
United States of America (USA)
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| Identical to |
DA4
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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 |
Direct / Battery = |
| Description |
This was a high mu possibly made for the Donle for the "Truphonic Amplifier". An article on page 11 of Radio World September 18th, 1926 describes the amplifier he developed in 1926. This shows a three tube circuit diagram but does not mention the type of tubes used.
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Dimensions (WHD)
incl. pins / tip |
37 x 104 x 35 mm / 1.46 x 4.09 x 1.38 inch |
| Weight |
46 g / 1.62 oz |
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Just Qvigstad
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Collection of
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