28 A
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United American: 28 A [Radio] ID = 1817533 1154x2100
Select picture or schematic to display from thumbnails on the right and click for download.
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alternative name
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American Bosch Magneto | ||||
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Brand |
Essex | ||||
| Year: 1928 | Category: Broadcast Receiver - or past WW2 Tuner | ||||
| Valves / Tubes | 8: 226 226 226 227 226 171 171 280 |
| Main principle | TRF (Tuned-Radio-Frequency but use of regeneration unknown); 2 AF stage(s) |
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| Tuned circuits | 3 AM circuit(s) |
| Wave bands | Broadcast only (MW). |
| Details | |
| Power type and voltage | Alternating Current supply (AC) / 110 Volt |
| Loudspeaker | Electro Magnetic Dynamic LS (moving-coil with field excitation coil) |
| Power out | |
| from Radiomuseum.org | Model: 28 A - United American Bosch Magneto |
| Material | Wooden case |
| Shape | Console with any shape - in general |
| Notes | One dial (primary tuning control knob) This set was also produced in Canada for Bosch and for Victor Talking Machines, LTD (V28). In some literature we found tubes 225 (which are only existing as Full-Wave Mercury-Vapor Rectifier from Kindermann) but this should be 226. |
| Price in first year of sale | 170.00 $ |
| External source of data | Ernst Erb |
| Source of data | Radio Collector`s Guide 1921-1932 |
| Circuit diagram reference | Radio College of Canada |
| Mentioned in | RCC Bosch section page 4 and Victor section page 3. |
All listed radios etc. from United American Bosch (Magneto Corporation); Springfield (MA)
Here you find 412 models, 158 with images and 269 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
