70th Anniversary FM Commemorative Broadcast
Anonym1ty writes "A special commemorative FM broadcast Saturday, June 11, at noon (EDT) will mark the 70th anniversary of Edwin H. Armstrong's first public demonstration of wideband frequency modulation (FM). The transmission, from Experimental Station WA2XMN (reminiscent of Armstrong's W2XMN call sign) will be on Armstrong's original 42.8 MHz frequency and will emanate from his landmark 400-foot Alpine Tower in NJ. The program will tell the tale of FM's difficult birth, as well as its impact on present-day communications and will include excerpts from a recording of a 1941 test broadcast of the New England Yankee Network. For those unable to receive 42.8 MHz FM, the broadcast is being retransmitted by WFDU-FM on 89.1 MHz and via the Web. Rebroadcasts will take place June 14 and 16 at 7 PM (EDT)"
...why does everyone flaunt Marconi when Tesla had voice transmission long before Marconi's public demonstrations were nothing more than Morse?
I think this is particularly cool considering FM almost didn't make it out of infancy. Armstrong worked for RCA and they had so much invested in it that they tried to kill it. He had to pay to put up his own transmitter. RCA even tried running an FM smear and fear campaign. HAHA
Madre de Dios! Es El Pollo Diablo! -- Captain Blondebeard
AM radio's susceptibility to interference makes it fun and useful for "listening" to electronics. For example, an AM radio will let you listen to transmissions on an ethernet cable and tell if it is plugged in and handling traffic. Old programmable calculators make the most interesting sounds as they chug through their calculations. Another plus is that you can hear lightening strikes from a great distance and listen as they approach or recede.
Two wrongs don't make a right, but three lefts do.
Any company selling a vacuum-tube radio for the 70th anniversary? I always did love the orange glow from the back of the radio console.
Why we can't listen to 42.8 on a radio anymore? Forgive me but I'm just a radio newb who just has one in his car. Thanks!
...in bed
Carousel is a lie!
Maybe it's just me, but I always thought WLW was a more interesting station.
500,000 100% modulated watts is a little crazy. you would have to practially feel it on a humid day.
In Soviet Russia, Trojan exploits YOU!
And 5 minutes reading that history page reveals only
"I don't know why K and W were chosen for the initial letters, or why the Bureau thought it necessary to split the assignments into two geographic groups"
And that you either didn't read the question, or the answer, or maybe both. But at least now we all know you don't, which my own Google search did not reveal.
--
make install -not war
I'm serious. While FM is nice, there are a lot of new technologies that permit digital communications over multiple frequencies (or even multiple directions on the same frequency) that are simply better than FM and and are held back for no other reason than cumbersome regulations and the notion that frequencies should be disected into chuncks of teritory like property. Property is about things that have real natural limits in supply and demand, not about things that have regulatory limits simply for the sake of locking in an industry and a particular technology.
FTA:
Throughout the 1940s he continued to lose money on promoting FM radio, fighting protracted patent litigation, and attempting to ward off regulatory attempts. He desperately craved recognition, bringing lawsuits and writing letters to the editor in an effort to demonstrate his accomplishments. Colleagues recognized his brilliance but viewed his desire for glory as obsessive and unnatural. Ill and despondent, in 1954 Armstrong put on his evening coat, hat, and gloves, and stepped out the window of his thirteenth-floor Manhattan apartment.
THIS is what IP law will get you.
What?