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Project Intercom EF-130

Project Intercom EF-130; General Electric Co. (ID = 977462) Kit Project Intercom EF-130; General Electric Co. (ID = 977444) Kit
Project Intercom EF-130; General Electric Co. (ID = 977463) Kit
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Project Intercom EF-130; General Electric Co. (ID = 977462) Kit
General Electric Co.: Project Intercom EF-130 [Kit] ID = 977462 700x381
Select picture or schematic to display from thumbnails on the right and click for download.
For model Project Intercom EF-130, General Electric Co. (GE); Bridgeport CT, Syracuse NY:
Volume knob missing.
 
Country:  United States of America (USA)
Manufacturer / Brand:  General Electric Co. (GE); Bridgeport CT, Syracuse NY
Brand
 
Musaphonic
Year: 1962 ?? Category: Kit (Parts plus instruction) or building instructions only
Semiconductors (the count is only for transistors) 3:
Main principle Audio-Amplification
Details
Power type and voltage Storage and/or dry batteries / 6 Volt
Loudspeaker Magnetic loudspeaker (reed) generic. / Ø 2.5 inch = 6.4 cm
Power out
from Radiomuseum.org Model: Project Intercom EF-130 - General Electric Co. GE;
Material Modern plastics (no Bakelite or Catalin)
Shape Miscellaneous shapes - described under notes.
Dimensions (WHD) 11.5 x 8.5 x 3.5 inch / 292 x 216 x 89 mm
Notes High impedance speaker (15 Ohms DC) with reed suspended between pole pieces, drives paper cone with a stylus, and is directly driven by the transistor collector, without an audio output transformer. Several contemporary GE transistor radio models also employed this kind of speaker which was originally used in the 1920's because of it's high efficiency and high impedance. The 3 transistors are given as ge-1 ge-2 ge-4 - not known if it is a real type number.
Net weight (2.2 lb = 1 kg) 1 lb 0 oz (1 lb) / 0.454 kg

Model page created by Joe Sousa. See "Data change" for further contributors.



All listed radios etc. from General Electric Co. (GE); Bridgeport CT, Syracuse NY
Here you find 2743 models, 1915 with images and 1939 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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