Armstrong Days at InfoAge
richardoneill at earthlink.net
Sun Oct 14 13:09:46 CDT 2012
1. Armstrong Days at InfoAge
Posted by: "Al"ygroups at ar88.net alklase
Date: Sat Oct 13, 2012 11:28 am ((PDT))
Regen Radio Fans,
2012 marks the 100th anniversary of the development of the regenerative radio circuit by Edwin Howard Armstrong an electrical engineering student at Colombia University. This invention not only greatly improved the performance of radio receivers, but would also become the basis for modern radio transmitters, making voice transmission, and radio as we know it, a reality.
The New Jersey Antique Radio Club's Radio Technology Museum will host an observance of the occasion at the InfoAge Science History Learning Center and Museum in Wall Township, NJ on November 10th and 11th from 1 to 5 PM. There will be a display and demonstration of a wide range of vintage regenerative radio receivers with a formal presentation at 2 PM. The other InfoAge museums will be open as well. Admission is free. A five-dollar donation to InfoAge is suggested.
Working receivers on display will include a mock-up of Armstrong's original circuit receiving a simulated spark radio-telegraph transmission, a WWI era naval receiver, early regenerative broadcast receivers, more sophisticated "regens" that dominated amateur radio and the early phases of the short-wave-broadcast craze in the 1920's and 30's, and a naval RAL receiver that served throughout WWII.
Armstrong is arguably the greatest radio inventor since Marconi. His regenerative receiver was followed in 1918 by the superheterodyne, the basis for nearly all modern radio receivers. During the 1930's Armstrong developed high-fidelity FM broadcasting. His FM technologies also found their way into two-way mobile radio, and radar during WWII.
See:http://www.rtm.ar88.net/Armstrong_Days_at_InfoAge.html for pictures and up-to-date information.
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