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R3D

R3D ; Magnavox Co., (ID = 374923) Speaker-P R3D ; Magnavox Co., (ID = 374925) Speaker-P
R3D ; Magnavox Co., (ID = 374926) Speaker-P R3D ; Magnavox Co., (ID = 374927) Speaker-P
R3D ; Magnavox Co., (ID = 374937) Speaker-P R3D ; Magnavox Co., (ID = 1261408) Speaker-P
R3D ; Magnavox Co., (ID = 1278652) Speaker-P R3D ; Magnavox Co., (ID = 1469773) Speaker-P
R3D ; Magnavox Co., (ID = 1469774) Speaker-P R3D ; Magnavox Co., (ID = 1469775) Speaker-P
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R3D ; Magnavox Co., (ID = 374923) Speaker-P
Magnavox Co.,: R3D [Speaker-P] ID = 374923 336x700
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For model R3D, Magnavox Co., Commercial Wireless and Development Co.; San Francisco, later Fort Waye, IN
 
Country:  United States of America (USA)
Manufacturer / Brand:  Magnavox Co., Commercial Wireless and Development Co.; San Francisco, later Fort Waye, IN
Year: 1924 Category: Loudspeaker, headphone or earphone
Wave bands - without
Details
Power type and voltage Storage Battery for all (e.g. for car radios and amateur radios)
Loudspeaker Horn / Ø 14 inch = 35.6 cm
Power out
from Radiomuseum.org Model: R3D - Magnavox Co., Commercial
Material Metal case
Dimensions (WHD) 355 x 725 x 310 mm / 14 x 28.5 x 12.2 inch
Notes Field coil 8-50 Ohms (rheostat) for 6 Volt storage battery. Field current 0.6 - 0.1 Amp. Ind.coil Input 700 Ohms. Crystalline finish. R3 (without suffix) was the special driver for different horn speaker models from 1921 - 1924. But there was also a radio set named R-3 !
Price in first year of sale 35.00 USD
Collectors' prices  
Mentioned in Radio Horn Speaker Encyclopedia, by Floyd A.Paul
Literature/Schematics (2) Radio Broadcast, Apr. 1924, p. 529

Model page created by Reiner Scholz. See "Data change" for further contributors.



All listed radios etc. from Magnavox Co., Commercial Wireless and Development Co.; San Francisco, later Fort Waye, IN
Here you find 889 models, 434 with images and 599 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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