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#1
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#2
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Witness is now MM3YNW, and is standing watching me type this. Don't you
all think she should learn Morse to continue the family tradition? ============================= Yes ,I feel she should ,having done the FL primer . Welcome to the AR community. Frank KN6WH / GM0CSZ |
#3
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From: Ian White GM3SEK on Sun, 18 Feb 2007
22:23:56 +0000 wrote: Also as sent over the land line the operator had to listen for the gap between clicks NOT the sound of the clicks! Try that folks! Irrelevant as to what any telegraph operator did prior to 1900...except for historical notation. On the contrary, the 'clicker' persisted in some parts of the US railroad system into at least the 1930s. My wife's father had been a telegrapher with the Delaware & Hudson, and on joining the US Army for WW2 he was re-trained to International Morse. He spent the rest of the war still pounding brass, just doing it differently than before. However, he didn't go back to the D&H in 1945, so others must determine exactly when the clicker did die out. What I described was PRIOR to 1900. A few railroad carriers in the USA continued with manual telegraphy until about 1960. But, in fairness to the world of communications, those were rare. The railroad system in the USA is not small and it is also not the biggest carrier of freight over here. Outside of the roll-on containers carried by rail between drop-off and pick-up points, the majority of land freight here goes by truck on our large highway system. Most of the railways over here had begun converting to data communications in various forms prior to 1940. Call the surprise witness... Witness relates that sometime around 1962, she visited Knott's Berry Farm with her Dad, Mom and sister. This was back when it was a working fruit farm, which had expanded into serving home style chicken dinners and berry pies. Knott's Berry Farm is a popular tourist spot in southern California...relatively close to the original Disneyland. It is roughly an hours' drive south from my Los Angeles residence. So it came to pass that the whole family wandered into the office at the railroad station. There was the telegraph, clicking away... Dad froze in intense concentration, and then doubled over with laughter! When he got his breath back, he told Mom and the girls what the clicks were saying: "Eat chicken dinners" No doubt. The Knotts place IS a tourist attraction. But, that reproduction of a railroad station is nothing more than a reproduction. It is not a working communications station. There are several railway station reproductions in the Greater Los Angeles area and parts of them on various motion picture production lots. Perhaps the best one is on the north side of Griffith Park (closest to my southern home) which is also a railway museum. Knotts also has several buggies and a reproduction of an "old west" stagecoach. Neither of which are used in any public transportation outside of the park. In the motion picture industry here (very big) there is a mild contention as to which craftsmen build the "best stagecoaches" (using modern materials having better characteristics). Those can be made to "break apart" safely for the cameras and stunt people riding them. However, stagecoaches have not been used for public transportation here for decades. Witness personally affirms that the message was delivered through the clicking of the telegraph sounder. I have nothing against that. In nearby Anaheim, Disneyland still has a flight to the moon experience (in Tomorrowland) yet it never leaves the ground. One can also take a ride in a "submarine" but not go more than a few feet below the water's surface. Witness is now MM3YNW, and is standing watching me type this. Don't you all think she should learn Morse to continue the family tradition? That is up the family suddenly thrust upon this (non) discussion. I was unaware that "wives and families" suddenly had some impact on what is known about telegraphic communications history in its half century before "radio" was demonstrated as a communications medium. I first "fired up" on HF in February 1953, part of my being assigned to a US Army communications station in Tokyo. That was a small 1 KW HF transmitter using TTY FSK. There were three dozen other transmitters there; six more would be added by 1955. NONE of the radio circuits of this 3rd largest Army station used any OOK CW mode of modulation. In my subsequent career change after service into electronics design engineer I've never had a requirement to use OOK CW on radio. Until 2005 when my wife and I bought a new car having a keyless entry radio-on-a-chain-fob. That fob transmitter is OOK CW. But, its data rate is beyond human cognition, ANY human. In 1969 my father and father-in-law were still alive. Both watched, in widely separated geographical locations (in the comfort of their homes), LIVE video from the moon as the first two humans stepped onto the lunar surface. Both my father and father-in-law were born in the year 1900... one year before Marconi's trans-Atlantic test radio transmission and three years before the Wright Brothers demonstrated the first heavier than air flight. Both astronauts plus Collins in the lunar orbiter were in constant touch with earth by radio...for both communications and telemetry, guided there by computers of several kinds, on earth as well as in the reentry and descent/ascent capsule. I have nothing against telegraphic skills nor anyone using those for personal pleasure. However, in the light of advancement of the electronic arts, communications, radio, methods that ALL of us can share, I think there is an over-much emphasis by radio hobbyists on telegraphic arts. Manual telegraphy IS a historic first but it has been supplanted in practical communications means at our disposal...on land, in the air, on the sea, and in space. I think we should be looking FORWARD to the future, not back to the past. Others disagree. I leave it at that. |
#4
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On Feb 18, 11:15�pm, "
wrote: From: Ian White GM3SEK on Sun, 18 Feb 2007 22:23:56 +0000 * *The railroad system in the USA is not small and it is also * *not the biggest carrier of freight over here. Actually, that depends on how you define "biggest". *Outside of * *the roll-on containers carried by rail between drop-off * *and pick-up points, the majority of land freight here goes * *by truck on our large highway system. Freight transportation professionals measure by the unit of ton-mile. By that measure, rail is the #1 provider of US freight transportation. * *Most of the railways over here had begun converting to * *data communications in various forms prior to 1940. That's true. Some manual Morse telegraphy survived into the 1960s, but in general the use of teletype and voice comms had become standard by the 1950s. Also, much of the need for telegraph communications was eliminated by changes to the dispatching systems in use. * *I first "fired up" on HF in February 1953, part of my being * *assigned to a US Army communications station in Tokyo. * A station that was maintained by several hundred Army personnel. That * *was a small 1 KW HF transmitter using TTY FSK. *There were * *three dozen other transmitters there; six more would be * *added by 1955. *NONE of the radio circuits of this 3rd * *largest Army station used any OOK CW mode of modulation. However, that was one station in one place. It was not necessarily representative of all military radio communications at the time, nor of amateur radio communications, then or now. * *In my subsequent career change after service into * *electronics design engineer I've never had a requirement * *to use OOK CW on radio. * You have also never been a radio amateur. Nor a professional radio operator. Until 2005 when my wife and I bought * *a new car having a keyless entry radio-on-a-chain-fob. *That * *fob transmitter is OOK CW. *But, its data rate is beyond * *human cognition, ANY human. * *In 1969 my father and father-in-law were still alive. *Both * *watched, in widely separated geographical locations (in * *the comfort of their homes), LIVE video from the moon as * *the first two humans stepped onto the lunar surface. *Both * *my father and father-in-law were born in the year 1900... * *one year before Marconi's trans-Atlantic test radio * *transmission and three years before the Wright Brothers * *demonstrated the first heavier than air flight. *Both * *astronauts plus Collins in the lunar orbiter were in * *constant touch with earth by radio...for both * *communications and telemetry, guided there by computers * *of several kinds, on earth as well as in the reentry * *and descent/ascent capsule. Of what relevance is that to amateur radio? * *I have nothing against telegraphic skills nor anyone using * *those for personal pleasure. * Many of your statements elsewhere on Usenet contradict that. However, in the light of * *advancement of the electronic arts, communications, radio, * *methods that ALL of us can share, I think there is an * *over-much emphasis by radio hobbyists on telegraphic arts. IOW, it's OK with you if someone uses it, as long as they don't emphasize it. * *Manual telegraphy IS a historic first but it has been * *supplanted in practical communications means at our * *disposal...on land, in the air, on the sea, and in space. Morse Code is also practical communications. And it is widely used in amateur radio today. * *I think we should be looking FORWARD to the future, not * *back to the past. *Others disagree. *I leave it at that. What does "FORWARD to the future" really mean in that context? Jim, N2EY |
#5
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#6
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On Feb 19, 6:53�pm, "
wrote: On Feb 19, 10:02?am, wrote: (whole lot of stuff that was snipped) * *Policy matters-arguments-discussions belong on * *rec.radio.amateur.policy. Is this a moderated newsgroup? Are you the moderator? * *This newsgroup is for experimentation and building * *radio-electronics in the home workshop. Really? The post of yours that I replied to contained comments on the railroad system, landline telegraph communications, Knott's Berry Farm and other tourist attractions, stagecoaches, wives- and-families, your lack of use of Morse Code in military communications, your parents watching the lunar landings on TV, and keyless auto security systems. I don't see a single word from you in that posting about "experimentation and building radio-electronics in the home workshop." It also contained this personal policy statement from you: "I have nothing against telegraphic skills nor anyone using those for personal pleasure. However, in the light of advancement of the electronic arts, communications, radio, methods that ALL of us can share, I think there is an over-much emphasis by radio hobbyists on telegraphic arts. Manual telegraphy IS a historic first but it has been supplanted in practical communications means at our disposal...on land, in the air, on the sea, and in space. I think we should be looking FORWARD to the future, not back to the past. Others disagree. I leave it at that." Sure sounds like you were having a policy discussion to me! Jim, N2EY * |
#7
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On Feb 19, 6:24 pm, wrote:
On Feb 19, 6:53?pm, " wrote: On Feb 19, 10:02?am, wrote: (whole lot of stuff that was snipped) ? ?Policy matters-arguments-discussions belong on ? ?rec.radio.amateur.policy. Is this a moderated newsgroup? Are you the moderator? ? ?This newsgroup is for experimentation and building ? ?radio-electronics in the home workshop. Really? The post of yours that I replied to contained comments on the railroad system, landline telegraph communications, Knott's Berry Farm and other tourist attractions, stagecoaches, wives- and-families, your lack of use of Morse Code in military communications, your parents watching the lunar landings on TV, and keyless auto security systems. I don't see a single word from you in that posting about "experimentation and building radio-electronics in the home workshop." It also contained this personal policy statement from you: "I have nothing against telegraphic skills nor anyone using those for personal pleasure. However, in the light of advancement of the electronic arts, communications, radio, methods that ALL of us can share, I think there is an over-much emphasis by radio hobbyists on telegraphic arts. Manual telegraphy IS a historic first but it has been supplanted in practical communications means at our disposal...on land, in the air, on the sea, and in space. I think we should be looking FORWARD to the future, not back to the past. Others disagree. I leave it at that." Sure sounds like you were having a policy discussion to me! Jim, N2EY ? - Hide quoted text - - Show quoted text - Here is an example of my second biggest peeve of these groups (the first being spam). It's ego posts. LenAnderson seems to be intent on demonstrating that he is the final authority; with an encyclopedic knowledge of all he is typing about. And a few put-downs here and there. Example: Ken Scharf made an interesting comment: "Also as sent over the land line the operator had to listen for the gap between clicks NOT the sound of the clicks! Try that folks!" Professor Anderson had to reply with: "Irrelevant as to what any telegraph operator did prior to 1900...except for historical notation." I applaud Ian White for his gentle rebuttal of Anderson; but of course "Professor" Anderson cannot be treated in such a manner. But I liked Jim, N2EY's "comeback" better. Even though it was a bit off topic, this was a nice discussion before the history lessons. I love history and I believe that it is extremely important (under taught) but I perceive that the spirit here was not to teach and inform. I am rather new to these google groups, usually not having to time to sit here sorting through posts and typing in some myself. But I have recently become somewhat disabled (military service). I have a life-long interest in vintage electronics, collect short-wave radios, and designed and built my own receiver. I came to these Google groups looking to receive and to share. It is distressing to witness ego flare-ups. Does this happen often here? I've seen it a few times on other groups, and on Yahoo. Say, can anyone point me to some information on creating my own filter chokes? Is there a source that anyone knows of for silicon-iron core plates? Thanks By the way, I despise flaming and I came a bit close to flaming Anderson, but couldn't help but say something about a monologue like his. |
#8
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From: "tack" on 21 Feb 2007 09:56:32 -0800
Here is an example of my second biggest peeve of these groups (the first being spam). It's ego posts. LenAnderson seems to be intent on demonstrating that he is the final authority; with an encyclopedic knowledge of all he is typing about. If that is your perception as "the truth," then I submit that "truth" is not correct. REC.RADIO.AMATEUR.HOMEBREW is chartered for designing, building radio equipment in the hobbyist's workshop; i.e., away from work in radio-electronics. You can read the FORMAL definition of it all you want and not come away with a much-different opinion. What seems to be at question is whether or not KNOWLEDGE should be shared. Plus, who is the "qualified" judge of such knowledge. I've never claimed to be any ultimate judge or lawgiver of historical data. However, I've accumulated a number of decades of both professional (paid for services) and hobby experience (no pay for anything unless negative money outflow is a value) that stretches back to 1947. It is my personal opinion that radio-electronics is a totally-fascinating field of technology...so much so that I changed my career goals in life to electronics engineering after release from my US Army service. I've never been disappointed in that decision. NO ONE here has any life experience in anything (including telegraphy) prior to the year 1900. ALL that any of us have for information on such long-ago times is historical descriptions. One of the problems with such historical information is WHO (or which organization) wrote it. An example is "morse code." Samuel F. B. Morse's "code" was originally all-numeric. That included the famous first message communicated by the Morse-Vail Telegraph Company from Washington, DC, to Baltimore, MD, in 1844. Morse's financial "angel" to the development of the telegraph system was the Vail family who got their money from rail- way equipment building. Alfred Vail would, according to the Vail descendents' website information and several other sources including the Radio Club of America, later suggest changing from an all-numerica code to one which included representation of the letters and common punctuation of the English language as well as Arabic numerals. This was pivotal in the success of the Morse- Vail telegraph system since, in effect, the code could be generated-sent-received and near-immediately transcribed into a common language. There was no need of phrase books to translate phrases and words into a numeric code, then re-translate it on reception. But that was only the second of two innovations. The real first was described in the Morse- Vail Telegraph Patent as the "relay." That relay was quite similar to what is in wide use in electrical and electronic equipment today...a 'sensitive' (low-power) electromagnet mechanically and magnetically coupled to an electrical contact. That contact could substitute for the transmitting key/switch and thus power a second telegraph line through a local battery and extend that telegraph line farther than the original circuit. Up to three such relays could be used given the technological limits of early electrical apparatus. It is my opinion (not "ego") that the telegraph Relay was the primary key to the success of the Morse-Vail Telegraph system. That basic telegraph system spread throughout the world during all of the later 1800s. Let's consider INNOVATION and its relation to "radio" and this morse code. The first radio-as-a-communications-means was demonstrated in 1896, in Italy and in Russia. Morse code was used in the on-off "radio wave" switching. Why that? For one thing, that on-off code was already so mature (52 years) and widespread that many "dialects" of that representational code existed worldwide. Early radio was so technologically-primitive that simple on-off switching was the only PRACTICAL means to communicate. On-off switching. That is what the Morse-Vail Telegraph used in its RELAY contacts. The only technological difference was that "radio" eliminated the wires using electromagnetic wave propagation to carry the communication. That was a revolutionary step for mariners and quickly adopted. They could now 'signal' beyond the visible horizon, something they were never able to do quickly before this revolution. But, in the midst of this revolutionary step of over-the- horizon near-instant communications, the Mythos developed about the Mode of "morse." Few could grasp the basic principles of this new "radio" but they could identify with the human-sensed on-off patterns and seeming magic of the patterns translatable to human-understood speech. Was the morse code the essential element to success of early radio? Not precisely. Those early damped-wave (spark-induced) "RF generators" and the gigantic rotary alternators (operating at VLF) were still turned all-on or all-off. What was essential for the speed of early radio was in using an on-off representation for the characters of a written language. The Morse-Vail Telegraph used English. They were the first success even though many had tried by various means prior to 1844. Had someone else in another country (and other language) been first and innovative enough, the name of the code could have been entirely different. Innovation. Sometimes a necessity in hobby work. Some parts may not be available yet their type would enable simple operation and building. The hobbyist must innovate to find substitutes. Sometimes that can be done by others and thus worthy of spreading information around. That's what newsgroups like this are good for...informing others of something useful in the hobby of designing-building-repairing of radio- electronics. Yes, there ARE diversions in this newsgroup into non- hobby subjects. Especially so in the USA amateur radio "revolution" of the elimination of morse code testing for a US amateur radio license. Many are emotionally wounded by that decision but that is just unfortunate for them. Progress goes on, innovation continues, the technology and ways to use that are evolving, changing. But, some want to "rewrite" history (or selectively use certain parts while omitting other parts) to make their own personal point about something dear to their hearts. James Miccolis is one of those over in RRAP. He has an archived decade of experience in "correcting" others in RRAP who do not agree with his one-sided views of amateur radio. For my part, I like to contribute information on designing-building-repairing of radio-electronics. I try to be accurate when doing so. No, I'm not presumptuous about "knowing everything" since I don't. I'm still learning things and eagerly do that...in between trying to keep up with the constantly- changing-state of the electronics art. We are all diverse and many of us in here come from differing occupations involving electronics. Yet I think that ALL who really like to get involved in the technology of radio-electronics DO want to contribute when we can. It IS a fascinating field of technology. By the way, I despise flaming and I came a bit close to flaming Anderson, but couldn't help but say something about a monologue like his. "Flaming" happens. It is the nature of the beast. You've already done what you despise but that doesn't bother me. After 23 years of doing computer-modem communications, I've seen much worse. :-) "Monologues?" :-) Yes, others get that impression. Sometimes one has to spend time "connecting the dots" (so to speak) in order to prove a point to one-sided others. Note: Explanations sometimes require more than three sentences in a paragraph. I was influenced by the enjoyable PBS series "Connections" by James Burke. There is a huge MASS of inter-related technology that has been developing among humans for centuries. I think it worthy to examine as much of that as it applies as possible. Others do not. shrug Regards, Leonard H. Anderson (real person, not a pseudonym) ex-RA16408336 |
#9
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On Feb 21, 12:56�pm, "tack" wrote:
Say, can anyone point me to some information on creating my own filter chokes? What size? Do you mean the type commonly used in hollow-state gear - several henries at a couple of dozen to a couple of hundred milliamps, insulated for hundreds or thousands of volts? If so, there is some info in older ARRL Handbooks and in older versions of "Reference Data For Radio Engineers". I can look up some details if needed. *Is there a source that anyone knows of for silicon-iron core plates? * aka laminations I googled "silicon iron transformer laminations" and found a lot of stuff. Take a look. But I suspect that they may be geared to production quantity orders. One common source is the power transformer from an old microwave oven. These are often welded together, rather than bolted, and it may take a bit of work with a grinder to get the core apart. 73 de Jim, N2EY |
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