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28 AC Ch= 29 RF

28 AC Ch= 29 RF; United American (ID = 365717) Radio
 
28 AC Ch= 29 RF; United American (ID = 365718) Radio
28 AC Ch= 29 RF; United American (ID = 361562) Radio 28 AC Ch= 29 RF; United American (ID = 619133) Radio
28 AC Ch= 29 RF; United American (ID = 361563) Radio 28 AC Ch= 29 RF; United American (ID = 539479) Radio
28 AC Ch= 29 RF; United American (ID = 539493) Radio 28 AC Ch= 29 RF; United American (ID = 619134) Radio
28 AC Ch= 29 RF; United American (ID = 1555623) Radio 28 AC Ch= 29 RF; United American (ID = 1555635) Radio
28 AC Ch= 29 RF; United American (ID = 1555636) Radio 28 AC Ch= 29 RF; United American (ID = 1555637) Radio
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28 AC Ch= 29 RF; United American (ID = 361562) Radio
United American: 28 AC Ch= 29 RF [Radio] ID = 361562 436x348
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For model 28 AC Ch= 29 RF, United American Bosch (Magneto Corporation); Springfield (MA):
United American Bosch 28 front view.
 
Country:  United States of America (USA)
Manufacturer / Brand:  United American Bosch (Magneto Corporation); Springfield (MA)
alternative name
 
American Bosch Magneto
Brand
Essex
Year: 1928 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 8: 26 26 26 27 26 71A 71A 80
Main principle TRF without regeneration; Neutrodyne
Tuned circuits 4 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Alternating Current supply (AC) / 105; 115; 125 Volt
Loudspeaker - This model requires external speaker(s).
Power out
from Radiomuseum.org Model: 28 AC Ch= 29 RF - United American Bosch Magneto
Material Wooden case
Shape Tablemodel, Box - most often with Lid (NOT slant panel).
Notes One dial (primary tuning control knob) for a 4-ganged tuning; Push-pull AF output. At that time the company was named "American Bosch Magneto Corproation" of Springfield, MA. - yet no "United" in the name. The cabinet is solid Honduras Mahogany with an oval ivory inlay on the front panel.
Price in first year of sale 132.00 $
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932
Circuit diagram reference Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
Mentioned in Collector's Guide to Antique Radios 4. Edition
Literature/Schematics (1) Radio Manufacturers of the 1920s, Vol 1
Literature/Schematics (2) Radio Broadcast, Oct. 1928, Page 369


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.




  
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