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History of the manufacturer  

National Electric Signaling Co. (NESCO) or Supply; Washington, D.C.

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Name: National Electric Signaling Co. (NESCO) or Supply; Washington, D.C.    (USA)  
alternative name:
National Electric Signaling Co. || National Electrical Supply Co.
Abbreviation: nesco
Products: Model types
Founded: 1902
Closed: 1919

In 1902, Canadian-born Reginald A. Fessenden, together with two Pittsburgh millionaires, Hay Walker Jr. and Thomas H. Given, founded the National Electric Signaling Company (NESCO) in order to promote the inventor's efforts. NESCO made the bold decision to try to directly compete with Marconi, by setting up a transatlantic radiotelegraph service, operating between Brant Rock, Massachusetts and Machrihanish, Scotland. Although Fessenden did achieve some initial success, including the first two-way trans-Atlantic communication by radio, the effort abruptly ended in December 1906, when the Machrihanish antenna collapsed.

In February 1909, NESCO won an important Navy contract, to supply a Fessenden-designed 100-kilowatt rotary-spark transmitter for a new high-power station being constructed in Arlington, Virginia. However, NESCO's transmitter failed to fully meet the contract specifications, and even worse, in 1913 the Navy determined that Federal Telegraph arc-transmitters were clearly superior, so Federal Telegraph ended up getting the transmitter contracts. Meanwhile, Fessenden's relations with NESCO's financial backers were becoming increasingly estranged, until finally, on December 28, 1910, the company's management attempted to seize the Brant Rock office records, while simultaneously enjoining Fessenden from further participation in company activities. Fessenden, who was formally dismissed from the NESCO the following month, sued the company for breach of contract, and the ensuing legal entanglements forced NESCO into receivership. At this point Fessenden permanently left the radio field, while a crippled NESCO struggled on as a minor company through World War One. In 1919 NESCO was taken over by Westinghouse and became part of RCA.

There is also the National Electric Supply Co., which is obviously the same establishment.

This manufacturer was suggested by John Koster.

Some models:
Country Year Name 1st Tube Notes
USA  18 Crystal Detector Receiver SE143   Crystal Receiver / reactive tuner (if used with vacuum tube). Tunes 250···3.000 m (100 kHz... 
USA  17 CN112   No built in detector. Terminals for both external audion and detector, selectable by switc... 
USA  18 SE899   Receiver for 300···12.000 m (25 kHz···1 MHz). 
USA  19 Heterodyne BC-104 VT-1  Heterodyne for Signal Corp, US Army SCR 97 receiver. 
USA  17 CN116   from Navy specification sheet: "Portable or Field Type Receiver with detector, audion, an... 
USA  17 CN-113   This CN-113 Crystal Receiver covered a frequency range of about 33 kHz to 1 mHz, and it... 
USA  17 CN114   From Navy specification sheet: "Portable or Field Type Receiver, with detector and buzzer... 
USA  17 CN115   From Navy specification sheet: "Receiver in Fibre Case with detector, Audion (Inside Box)... 
USA  26 Medium Wave Receiver CGR-5 UX200A  Built for the Coast Guard by National Electric Supply (Nesco) the CGR-5 was similar to the... 
USA  23 Long Wave Receiver Type SE 1899   The National Electrical Supply Co. Long Wave Receiver Type S.E. 1899 produced in 1923 for ... 
USA  21 Nesco Junior Crystal Set   National Electrical Supply The NESCO Junior Radio Receiver crystal set. 
USA  23 Two-Stage Audio Amplifier SE 1000F UV201  National Electric and Supply SE 1000F Two-Stage Audio Amplifier. Made for a Coast Guard Co... 


Further details for this manufacturer by the members (rmfiorg):

Company letterheadtbn_usa_nesco_letterhead.jpg