Slashdot Mirror

← Back to Stories (view on slashdot.org)

70th Anniversary FM Commemorative Broadcast

Posted by ryuzaki0 on from the thank-goodness-for-the-top-40 dept.

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)"

29 of 109 comments (clear)

  1. Clear channel by cataclyst · · Score: 3, Insightful

    Good thing that FM radio has been used for so much good since then. 70 years later, and half the stations play the same 5 songs, over and over and over...

    Wonder if he saw that coming...

    --
    E = m * c^(Hammer)
  2. Radio by treff89 · · Score: 3, Insightful

    Hasn't radio been one of _the_ most important inventions of all-time? We use it for everything now: 802.11x, microwaves, television, some Internet... lots of stuff to do with digital. :P It's been so incredibly useful that it's actually quite a nostalgic event that's about to take place.

    1. Re:Radio by cataclyst · · Score: 2, Informative

      I dunno about FM's role, however.. not all RF waves are Frequency Modulated.... [like AM, for example]

      --
      E = m * c^(Hammer)
    2. Re:Radio by insignificant1 · · Score: 5, Informative

      Well, FM was and is still important. Popular modulation schemes include both frequency modulation and amplitude modulation, but either is appropriate in different settings.

      One advantage to FM is its relative immunity to certain kinds of noise (often noise is additive, and hence the amplitude is affected directly by noise whereas the frequency is less affected).

      FM is the precursor to (and was at the time) more noise and jam-resistant schemes. The tradeoff is it requires greater bandwidth than AM to transmit a given signal.

      Check out this wikipedia link to find out more about different MODULATION schemes...

  3. Seeing the mention of Marconi in his bio... by SeventyBang · · Score: 3, Interesting

    ...why does everyone flaunt Marconi when Tesla had voice transmission long before Marconi's public demonstrations were nothing more than Morse?

    1. Re:Seeing the mention of Marconi in his bio... by davmoo · · Score: 3, Interesting

      Now that someone else has given you a useless wise-ass grammar nazi reply, I'll try to give you one that actually answers your (very valid) question.

      Because Marconi knew how to work public relations and his supporters. Its the same reason that Edison gets so much credit when Tesla had more to do with how we use electricty today than Edison ever did.

      For a good example, look at how the Smithsonian treats Marconi and Edison in relation to how they treat Tesla. Then look at the records and see how much money Marconi and Edison supporters and family donate to the Smithsonian.

      Tesla was so busy actually inventing useful things that he didn't have time to work the press. Since Marconi and Edison didn't do all that much themselves, they had plenty of time to "press the flesh".

      --
      I want a new quote. One that won't spill. One that don't cost too much. Or come in a pill.
  4. Little Known Fact by kevcol · · Score: 3, Funny

    Armstrong also once was working on a live radio transmitter when his finger touched the bare leads of a capacitor.

    Yes, he was the worlds first FM Shock Jock.

  5. Re:42.8 by PornMaster · · Score: 3, Funny

    d00d!!! just underclock your radio, and while you're in there, put in a cold cathode blue light!

    --
    500GB of disk, 5TB of transfer, $5.95/mo
  6. for us linux users by xbmodder · · Score: 5, Informative

    To play it via linux:
    mplayer -cache 128 http://64.92.199.76/WFDU-FM
    --
    I hope we can setup some mirrors so during the broadcast they don't get slashdotted. anybody know how to convert asf to mp3? if so someone setup a mother stream. I am writing up a script right now for dynamic redirection on their server.

  7. AM v. FM by 1967mustangman · · Score: 2, Interesting

    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
  8. Re:42.8 by flynns · · Score: 3, Informative

    Well, -you-, anyway. I'll probably just run down to the clubhouse and listen there on the Icom 738. Amateur radio kicks ass. =)

    Sean
    KI4IIB

    --
    'If you're flammable and have legs, you are never blocking a fire exit.'
  9. Advantages of AM's susceptibility to interference by G4from128k · · Score: 5, Interesting

    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.
  10. A Vacuum-tube Radio... by __aaclcg7560 · · Score: 2, Interesting

    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.

  11. Anyone got any idea... by tekiegreg · · Score: 2, Interesting

    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
    1. Re:Anyone got any idea... by insignificant1 · · Score: 3, Informative

      The way radio works is that your car radio has to "tune" to the frequencies that you are listening to. Tuning means you have a little pure-tone synthesizer in your car that produces pure tones at different frequencies.

      Now the real reason why it doesn't tune that low in frequency is because there is virtually no demand to listen to amateur radio bands. And it costs money to make that synthesizer generate more frequencies than required. So you have to pay more money to tune into those frequencies, in the form of a new purchase, or you have to build your own tuner that will work across all the frequencies you want to listen to.

    2. Re:Anyone got any idea... by Anonymous Coward · · Score: 2, Informative

      Why do people automatically assume that if it is outside the 2 well known broadcast bands that it is amateur radio bands? This is why there has been such a problem with BPL. It seems like most people think that there are the AM broadcast, FM broadcast a handful of TV stations and the rest of the spectrum is in the possesion of the amateurs. Please look at http://www.ntia.doc.gov/osmhome/allochrt.html
      and tell me what 42.8 has to do with amateur radio.

  12. Lawrence Lessig wrote about Armstrong... by Saint+Aardvark · · Score: 5, Interesting
    ...as part of his book Free Culture (available now if you sign up as a member of the Free Software Foundation. Do it today!). Before you think it's boring, or that things today are completely different from how they ever have been, read:

    As our own common sense tells us, Armstrong had discovered a vastly superior radio technology. But at the time of his invention, Armstrong was working for RCA. RCA was the dominant player in the then dominant AM radio market. By 1935, there were a thousand radio stations across the United States, but the stations in large cities were all owned by a handful of networks.

    ....Armstrong's invention threatened RCA's AM empire, so the company launched a campaign to smother FM radio. While FM may have been a superior technology, Sarnoff was a superior tactician. As one author described, "The forces for FM, largely engineering, could not overcome the weight of strategy devised by the sales, patent, and legal offices to subdue this threat to corporate position. For FM, if allowed to develop unrestrained, posed ... a complete reordering of radio power ... and the eventual overthrow of the carefully restricted AM system on which RCA had grown to power."

    ....Armstrong resisted RCA's efforts. In response, RCA resisted Armstrong's patents. After incorporating FM technology into the emerging standard for television, RCA declared the patents invalid--baselessly, and almost fifteen years after they were issued. It thus refused to pay him royalties. For six years, Armstrong fought an expensive war of litigation to defend the patents. Finally, just as the patents expired, RCA offered a settlement so low that it would not even cover Armstrong's lawyers' fees. Defeated, broken, and now broke, in 1954 Armstrong wrote a short note to his wife and then stepped out of a thirteenthstory window to his death.

    ....This is how the law sometimes works. Not often this tragically, and rarely with heroic drama, but sometimes, this is how it works. From the beginning, government and government agencies have been subject to capture. They are more likely captured when a powerful interest is threatened by either a legal or technical change. That powerful interest too often exerts its influence within the government to get the government to protect it. The rhetoric of this protection is of course always public spirited; the reality is something different. Ideas that were as solid as rock in one age, but that, left to themselves, would crumble in another, are sustained through this subtle corruption of our political process.

    --
    Carousel is a lie!
  13. Legal unlicenced FM transmission by Bananatree3 · · Score: 2, Informative

    It is possible to transmit FM signals unlicenced, as you can probably find from your iTrip, etc. You can find the regulation on it here: http://www.fcc.gov/mb/audio/lowpwr.html

    1. Re:Legal unlicenced FM transmission by Tony+Hoyle · · Score: 2, Informative

      Only in the US though. In most of the world the itrip is strictly illegal (be careful if you're visiting over here).

  14. Broadcasting on 48.2FM by LordSnooty · · Score: 2

    Will there be a rush on Thomas Salter Crystal Radio sets in the morning amongst the radio ham community? And is 70 really a birthday worth going to town for? 75, or 100, yes. 70?

  15. WLW by Deathlizard · · Score: 3, Interesting

    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!
  16. Re:Letter Imperfect by SPY_jmr1 · · Score: 2, Informative

    Two seconds on google... http://earlyradiohistory.us/recap.htm

  17. 42.8 MHz is not in a ham band.. by the_rajah · · Score: 2, Informative

    It was actually an FM radio band back before FM broadcasting got moved up to 88-108 MHz. Now it's part of the public service band, as in police, utility companies, forest rangers, etc.

    As was pointed out above, most scanner radios will receive that frequency just fine.

    --


    "Do the Right Thing. It will gratify some people and astound the rest." - Mark Twain
  18. Re:Letter Imperfect by Doc+Ruby · · Score: 2, Interesting

    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

  19. To celebrate - close down the FCC by argoff · · Score: 2, Interesting

    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.

    1. Re:To celebrate - close down the FCC by connorbd · · Score: 3, Informative

      The only way to accomplish this would be to rebuild the entire radio communications system from the ground up, and not allow anyone to use anything else. That is so not going to happen -- the problem is akin to tearing down a city and rebuilding it from the subterranean level up. It's not that it isn't possible -- it's just that it would cost so much money and displace so many people that there's no reason on earth why anyone should think it a good idea. (The few cases where such a thing is possible -- postwar Germany, Kabul, Beirut, Nero's Rome, Banda Aceh -- it's been because of war or natural devastation.)

      People who make this assertion don't really understand the nature of radio waves. You can't simply switch everyone over to a 5GHz spread spectrum scheme -- the propagation characteristics are very different at 1100 KHz, 25 MHz, 100 MHz, 460 MHz, 900 MHz, and 2.4 GHz (to take a half dozen frequencies in commonly used areas). The regions above about 6 GHz are pretty much useless for anything but short-range communication, satellite communication, and radar, while the CB bands at 27 MHz are superbly unsuitable for their intended purpose because they're potentially capable of worldwide propagation given proper ionosphere conditions.

      If you want an idea of what an unregulated radio world, look at a shortwave guide and see what the US offers. How many of them aren't religious broadcasters? How many of them broadcast far-right tripe? Look at the CB bands and see what kind of crap goes on there, in a 40-channel swatch that the FCC gave up on enforcing years ago. Eventually you'd have nothing but a vast swatch of radio anarchy, with jammers, rednecks, and general troublemakers shouting down anyone they don't like.

      Or you could just google the callsign KG6IRO or name Jack Gerritsen and find out why that fellow recently went to jail for what he did with his ham radio equipment. Talk all you want about the nobility of your cause and giving the airwaves back to the people, but if there was such a thing as radio anarchy, there'd be a lot more douchebags like Gerritsen out there.

  20. Re:Letter Imperfect by SPY_jmr1 · · Score: 3, Informative

    *grumble*

    You would be correct.. I didn't read the history page that closely.

    Therefore: "Here is a possible explanation as to how the USA got W and K, no documentation on this but sounds plausible. The USA had unofficially used N for North America (e.g., NBZ, Boston), also A for America. The letter "N" in morse is dah dit, adding a dah to N gives dah dit dah which is "K'. Letter "A" in morse is dit dah, adding a dah to A gives dit dah dah which is "W"."

    source: http://www.ac6v.com/history.htm/

  21. Re:Letter Imperfect by soren42 · · Score: 2, Informative


    Actually, US radio call signs begin with A, W, K, or N. The FCC has decided which service classes may use which call groups (e.g., broadcast stations are only assigned calls starting with W & N).

    The entire alphabet is maintained by the International Telecommunications Union (ITU) and its precursors. The earliest assignment of these call letters to the US dates back to early radio in 1913, and has been maintained ever since.

    73 de N4JCK

    --

    "Adventure? Excitement? A Jedi craves not these things."
  22. See? by iminplaya · · Score: 3, Interesting

    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?