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October 14th 03, 06:52 PM
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(Len Over 21) wrote in message ...
In article , (N2EY) writes: In article , (Len Over 21) writes: In article , "Kim" writes: "Hans K0HB" wrote in message e.com... "Kim" wrote Spark transmissions were outlawed (as well they should have been) so the precedent exists. Hmmmm, Jim/N2EY made that observation also. Then, I see the comment that spark was a transmission method--not a mode. I think that's splitting hairs, isn't it? I'm asking--I wasn't around for spark  The ONLY way a "spark" transmitter could send anything called communications information was by on-off keying. there were other types of transmitters on the air even before WW1. Arc transmitters and Alexanderson alternators were two types. Transmitters using tubes were in use well before 1920. Irrelevant. No, very relevant. Spark was not the only option before 1920. And after 1920, there were even more options. Amateurs pretty much abandoned spark by 1924-1925. Oddly enough, there was no international treaty requirement for amateurs to be code tested until 1927. The first 'broadcast' stations were actually amateur stations. Using tube transmitters. They do not get the recognition of KDKA and WWJ because none of them were in operation on a regular, continuing schedule. From ALL the available literature of old-time amateur radio prior to 1920, Have you read *all* of it? I doubt that very much. 1920 is twelve years before you were born, Len. So you weren't there. THE OVERWHELMING MAJORITY of amateur radio transmitters were of the "spark" type. Irrelevant. And there's no need to shout, Len. Your words DO NOT BECOME MORE TRUE WHEN CAPITALIZED!!! "Spark" transmitters can be modulated SOLELY by ON-OFF KEYING. That's simply not correct, Len. And you know it. The sole surviving Alexanderson Alternator VLF RF generator is in Grimeton, Sweden, and used once each year for a brief period in a ceremony for Televerket, the Swedish government's telecommunication works. A ceremonial event, not one for any actual communication. Irrelevant. But at least not as boring as your usual diversions. The practical transmission of voice and music by radio was demonstrated as early as 1906. ONLY with a rotary alternator with a WATER COOLED MICROPHONE. No, with spark. Demonstration only, and then ONCE. Irrelevant. Since "morse code" was already in practice and was totally on-off keying, it was adopted as The "radio code." Was that a bad thing? Point of fact only. What's your point? Do NOT "rewrite" what I wrote. I asked a question. Is that not allowed? Who made you the moderator? Morse code was developed for ON-OFF KEYING...on land lines. Sure. Modern "land lines" (in the form of fiber optics) still use on-off keying. Even though it's a very old idea. "Spark" transmitters could communicate ONLY by on-off keying. Repeating the same misinformation doesn't make it any more correct, Len. Morse code was first used commercially for communications in 1844. The first demonstration of radio as a communications medium was 1896. That is a 52 year period allowing maturing of the ON-OFF keying of telegraphy. Telegraphy by the Morse-Vail telegraph system had spread worldwide by 1896. And your point is? The adoption of a long-existing (since 1844) LANDLINE code says absolutely nothing about its efficacy in radio communications, ability to "work through" or much else. Actually, the code used in radio is different than the code used in landline work. Totally irrelevant to the point. No, exactly relevant. In fact, prior to 1912 there were at least three different codes in use in radio. One of the changes brought about by the Titanic disaster was standardization on the "Continental" or "International" version, which is quite different from that used in "land line" work. Early primitive radio could ONLY work with an ON-OFF KEYING method. Incorrect. Despite all the variant dialects of "morse codes," ALL work ONLY by ON-OFF KEYING. ALL. Not true! And there's no reason to shout. Any version of Morse code can be applied to frequency shift keying or phase shift keying or a variety of other modulation methods. On-off keying is simply the most commonly used method for radio purposes. Would you stop your persistent denigration of Morse code and those who use it if we shifted (pun intended) to FSK or PSK? The efficacy of Morse code when applied to radio has been demonstrated many, many times over the past century-plus. Radio amateurs continue to demonstrate it every day. Self-serving emotional exaggeration. Not at all. A plain, simple fact. You're the one who gets all emotional and exaggerates, Len. All that shouting and carrying on in here. Really, one would think you were a bit more mature by now. As for self-serving - well, all those long boring irrelevant diatribes on old military radio sets that you post here..... Radio amateurs worldwide continue to USE all the modes and modulations allocated to them every day. "Demonstration" refers to the first use of a method. That differs from USE. Splitting hairs, I see. On-off keying was adopted simply because it was the ONLY WAY POSSIBLE for early, primitive radio to allow communications. It's just practical applied physics. Nothing else. And it works very well. It does NOT work optimally compared to OTHER modes. Radio as a communications medium is 107 years old. ON-OFF KEYING of a radio frequency carrier is NOT a new concept nor is it the best for communications. Who are you to judge? You've never used Morse code, from what you tell us. Would you stop your persistent denigration of Morse code and those who use it if we shifted to FSK or PSK? Even after the invention of other methods of transmission, the use of Morse code continued. Irrelevant. Refusal to change has many and varied reasons. Only some of those refusals are relevant or applicable. NO ONE is contending that ON-OFF KEYING was not the first. Under the beginning subject thread, the subject was the CODE TEST. You cannot explain or demonstrate or justify a reason for code test retention JUST BECAUSE IT WAS THE FIRST MODE IN RADIO. The first radio-as-a-communications means was 107 years ago. All other radio services have either dropped morse code mode or never considered its use when that radio service began. And what's your point in all of this? Do you want amateurs to stop using on-off keying? Do you want amateurs to stop using Morse code? Continued USE of morse code modes DOES NOT POSSIBLY ADVANCE ANY STATE OF THE RADIO ARTS. Yes, it does, in many ways. Of course, that doesn't prove that there must be a code test of any kind. Len, you're so emotionally connected to denigrating a form of keying and a form of communication that you can't see that. You go far beyond wanting to end a test. In ANY radio service, including amateur radio. Who are you to judge, Len? You've never used Morse code and you've never been a radio amateur. |
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