This web-article details most of the various members of the NC-100 family and it became an extensive family (over sixty different variations) that grew as National up-graded and improved the receiver over its 13 years of production history.
- Henry Rogers - March 19, 2012: The "MOVING COIL" NC-100 Receiver from 1936 (sn 334-D) showing the original "art deco" design of the aluminum overlay front panel.
Every day she receives hundreds of samples of earth taken from the mine. …then pulverized to the consistency of baby powder. But two rows above gold is another metal of antiquity that looms large in our lives: copper; symbol Cu; atomic number 29—29 protons, 29 electrons. Bronze helped to spur global trade, and, once forged into tools and weapons, it played a defining role in the empires of antiquity. I'm here because they're about to cast several bells.
This rock face is about a quarter mile below the surface, and, according to John Taule, it's loaded with gold, somewhere. That's where Gayle Fitzwater and the assay team come in. I think I've seen one of these machines at Starbucks. It is, perhaps, the most emotional of the elements. Tin added in small amounts to copper makes bronze, the first manmade metal alloy. This is The Verdin Company, a 170-year-old family-run business in Cincinnati, Ohio.
Includes NC-100, NC-101X, NC-80X, NC-81X, NC-100A family, NC-200, NC-240CS, NC-240D Dept of Commerce & CAA Airway Communication Receivers Military Versions - RAO family, RBH, NC-100ASD, R-115, R-116 History of Design and Production, Moving Coil Catacomb Details, WWII Versions, Post-WWII Production, Serial Numbers, Restoration Write-ups Besides National's masterpiece, the HRO, another series of receivers produced by National Company, Inc.
were very popular and accounted for a lengthy production history.
Il criterio di scelta sarà l'esperienza dei laboratori nella datazione dei reperti archeologici Il prelievo dei campioni avvenne il 21 aprile 1988 nella sacrestia del Duomo di Torino da Franco Testore, docente di tecnologia dei tessuti presso il Politecnico di Torino, e Giovanni Riggi di Numana, microanalista.Il primo effettuò le operazioni di pesatura, mentre il secondo eseguì materialmente il taglio.Presenti tra gli altri all'operazione, oltre ai due scienziati summenzionati, c'erano il cardinale Ballestrero con quattro sacerdoti, Luigi Gonella, il rappresentante dell'Accademia Pontificia delle Scienze, i fotografi e il cineoperatore. Renato Dardozzi, membro della Pontificia Accademia delle Scienze, il dott.Note the relocated pilot lamp and the hole plugs covering the unused crystal filter control holes when compared to the NC-100X (header photo.) - Many radio engineers of the thirties believed that the absolute, best sensitivity and stability of a communication receiver's RF amplifier, First Detector and Local Oscillator could only be achieved by using "plug-in" coils.This type of approach eliminated problems of lead length, shielding and stability along with isolation of unused tuned circuits - problems that were commonly found in broadcast receivers using conventional rotary bandswitches. Handling three individual coils for each band change, storage of the unused coils and how to remove B when changing coils all added to the counter-belief that plug-in coils were archaic.