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Duo Symphonic 1930 Chassis and LS 226

Duo Symphonic 1930 Chassis and LS; Lafayette Radio & TV (ID = 455301) Radio
Duo Symphonic 1930 Chassis and LS; Lafayette Radio & TV (ID = 693944) Radio Duo Symphonic 1930 Chassis and LS; Lafayette Radio & TV (ID = 693945) Radio
Duo Symphonic 1930 Chassis and LS; Lafayette Radio & TV (ID = 693946) Radio
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Duo Symphonic 1930 Chassis and LS; Lafayette Radio & TV (ID = 693944) Radio
Lafayette Radio & TV: Duo Symphonic 1930 Chassis and LS [Radio] ID = 693944 933x921
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For model Duo Symphonic 1930 Chassis and LS 226, Lafayette Radio & TV Corp; New York (NY):
From Lafayette catalog 1930 season 1929/30 page.17
 
Country:  United States of America (USA)
Manufacturer / Brand:  Lafayette Radio & TV Corp; New York (NY)
alternative name
 
Wholesale Radio
Year: 1929/1930 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 9: 226 226 226 226 224 226 245 245 280
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) / 50 to 60 cycles, 105 - 120 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 12.25 inch = 31.1 cm
Power out
from Radiomuseum.org Model: Duo Symphonic 1930 Chassis and LS [226] - Lafayette Radio & TV Corp; New
Material Metal case
Shape Chassis only or for «building in»
Notes Both, "Radios Collector's Guide 1921-1932" (McMahon) and Rider's Perpetual volume 1 show this model under "Wholesale" instead of "Lafayette". See also "Duo Symphonic 1931" with dual volume control (antenna and AF stage) and "Great Duo Symphonic". According to McMahon, the Duo Symphonics have one untuned RF circuit and 3 tuned RF circuits - but Rider's shows clearly that it has 4 tuned circuits (4 gang tuning condenser) and two stages AF with push-pull output. In order that the model can be found by tube search with tubes CX326 or 226, we distinguish this otherwise same chassis here only! CX tubes are from Cunningham. The detector tube is the only screen grid tube C324 or a 224.

The Lafayette Duo Symphonic is in fact using the Wells-Gardner & Co chassis model C or CG, first type. You see this clearly by comparing the Rider's schematic Wells-Gard. page 1-1 and 1-2 (see versions) with the schematic "Wholesale" page 1-2. It is the "Old Type" schematic.

Nevertheless, Lafayette describes this the following way: "The problems of our engineers was not only to build a receiver that would outperform anything in the world, but to build the dame receiver at a price that would bring it within reach of the average home."

The catalog 1930 for season 1929/30 names this 9 tube TRF chassis a "Screen-Grid Neutrodyne Neutrodyne-Beers Double Primary". The Lafayette Duo-Symphonic Screen-Grid has a "special Utah Stadium Dynamic-Speaker chassis" producing from 30 to 5000 cycles, linear power detection and local distance switch. We don't know the tube line up, just that it has 2 tubes 245 for push-pull operation. The same chassis is used for Lafayette Duo-Symphonic models 342, 316, 324, 370, 343, 300, 362, 357, 325, 329, 350 and 352, a Phono-Radio Combination.

The list price for the chassis 9 tube Screen-Grid Duo-Symphonic incl. Utah Stadium Dynamic Speaker is $ 131.75 without tubes/aerial equipment or $ 156.50 with - but Lafayette puts a price of $ 64.50 or $ 76.64 all inclusive. There is no measurement given for this model. See details and summaries for the models of this catalog.
Price in first year of sale 77.00 $
External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
Literature/Schematics (1) Lafayette Radio Catalog (Wholesale Radio Service Co. Inc. catalog 1930 for 1929/30, page 18 - 31. 17.)


All listed radios etc. from Lafayette Radio & TV Corp; New York (NY)
Here you find 1308 models, 1116 with images and 395 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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