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#191
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From: "Kim" on Sun 3 Jul 2005 00:51
"Dan/W4NTI" wrote in message So, several posts, with typical human error. Is that ignorance of the very language you speak, Dan? Remember how you go off on tirades all the time about my "ignorance" of ham radio. Payback is hell, ain't it? I'll quit now. I made my point, even though you'll be indignantly opposed to it. Tsk. A whole six-pack of Billy Beer will do that. :-) As somebody once wrote in here once, "Ya jes' cain't fix stupid!" Or, I might add, a drunkard... |
#192
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From: "John Smith" on Sat 2 Jul 2005 16:19
Len: The words and wit which flow from your rather quick mind are enlightening, entertaining and enjoyable, if not for you, this thread is rather drab and boring... Thank you. "It's a rough job, but SOMEBODY has to do it..." ... doesn't the chanting from the ARRL/FCC monks and worshipers ever annoy you? It drives me nuts! grin Yes it does. I just grab a bottle of aspirin. Not the tablets, just the nice cotton padding in the top of the bottle. Easy to work into nice ear stopples. :-) The silence is golden! Shhhhh...... Oh, I should explain the "Tut, Tut" ending of my previous message. You and I know that the Egyptian government's King Tut exhibit is in Los Angeles for a couple months. Others who only believe that "the South" is the United States won't know that. [they might believe it came from Cairo, Illinois, though...] :-) bit bit |
#193
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There was a comedian (a Brit, I believe) that had a routine called "clean
and dirty" that went something like this: Hen is a clean, cock is a dirty; Bolt is a clean, screw is a dirty; Cat is a clean.... and he could actually go on for about ten minutes ... it was a very good schtick. As I recall, George Carlin did a takeoff on this, but I can't remember the details. Jim wrote in message oups.com... From: "RST Engineering" on Sat 2 Jul 2005 17:10 Ooooo...lots of jollies with words! :-) |
#194
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rst
I was wondering where you got your silly material from, did you ever notice it gets quite tiring? John "RST Engineering" wrote in message ... There was a comedian (a Brit, I believe) that had a routine called "clean and dirty" that went something like this: Hen is a clean, cock is a dirty; Bolt is a clean, screw is a dirty; Cat is a clean.... and he could actually go on for about ten minutes ... it was a very good schtick. As I recall, George Carlin did a takeoff on this, but I can't remember the details. Jim wrote in message oups.com... From: "RST Engineering" on Sat 2 Jul 2005 17:10 Ooooo...lots of jollies with words! :-) |
#195
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![]() Dan/W4NTI wrote: Very impresive indeed Lennie. Got any proof? Your the one that demand proof all the time....put it up right here. You have a scanner, right? No. That would be me. Do you have something that needs proved? I never had a need for the 1st or 2nd commercial. What's your problem? I've never had a need for morse code, but I took the tests. Got the GROL at the same time I passed the Advanced and Extra writtens. Didn't do so hot on the morse code tests back when I was actually interested. Most to all of my electronics technicial work was done with military contractors, or companies that had a 1st ph there already. Of course you do realize that all the first pnones and seconds were just dropped away. So they really didn't amount to much anyway. Sorta like the ham tests of today. And hey good deal on passing the on-line tests of today. Pre teen age children do the same with ease. What does that tell you Lennie? I don't belong to the VFW Lennie. They didn't want any Vietnam Vets to join a few years ago (course they want us now), so I gave them their wish. Do you grant everyone their wish? I am a lifetime member of the DAV however. Oh you know them don't ya Lennie? Only way to get in is to be disabled while in military service and have a service connected rating. My brother belongs to DAV. I belong to VFW. My dad is active in the American Legion. What's this all about? A place to drink beer? We don't have a local branch I'm sorry to say. You meant a "post." Start one. I may join with the Vietnam Veterans of America, ain't decided just yet. Never heard of them. See ya. Thanks for the warning. ;^) |
#196
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From: "John Smith" on Sat 2 Jul 2005 20:50
Mike: No. I don't think you understand anything. But, I think I read you loud and clear. You want to pretend everyone is making fun of poor old ancient hams and they don't deserve it. Get real, they need it alright, they need to wake up. Good posting, John, you've synopsized what most of the silent readers have already surmised about these Ancient Radio Astronauts that no one was in search of. Coslo "wants" a super-simple explanation so that he and other Titled, federally authorized amateurs can look down on others while holding up their super-special morse keys, gloating in triumph of "achievement." I will fill in a few blanks (or rather, blank stares) for the morsemen... For "education" on information compression, there is Claude Shannon's 1947 paper that explained the basic laws. The rest of the radio world gave it a peer review and accepted it en toto. The full paper is archived at the University of Illinois website and may be elsewhere. "Shannon's Law" has been given in so many communications textbooks of the last half century that it is a major months' work just to do a bibliography. It is universal, it is accepted. The many pages on statistics involved aren't necessary to fully understand the concept (thousands of others have already gone through them with critical fine-teeth combs and passed it). "Shannon's Law" relates Rate-Bandwidth-Noise- Error in as elegant a form as possible. It is absolute. It is the Touchstone, the Bedrock in communications. ALL communications, NO exceptions. Once the basic relationship is accepted, the student can then turn to information reduction-compression, especially in the high redundancy of human speech-symbolism-utterance-imagery. The SECOND version of "morse code" (the one including letters and some punctuation, the first one was only numbers) owes much to even earlier manual type setters. In English the letter E is the most frequently used one, so type setters arranged their type case/holders with the E slugs at easy reach. Alfred Vail, Morse's financial angel, saw that and suggested it to Morse. In that way morse code's letter E is the shortest possible data information bit, a single "dit." The other letters followed - roughly - the type setters' arrangements, less-used letters having longer time completions. Punctuations are given long time sequence completions, occurring less often than letters. Numbers are of approximate same length, apparently in a hold-over of Morse's first code scheme (unknown, that is really arbitrary except to those who just want to argue angels on heads of pins busy-work). The end result was a rather complex sequence of short-long-interval time-related BITS to represent the major components of the ENGLISH language, native to Morse and Vail and most everyone in their 'hood. Enter the Morse-Vail Telegraph System, now patented, in 1844. Primitive in electrical terms but vastly faster than message transport by horseback and something that will work through visual obscuration (as in the European visual semaphores). The heart of the Morse-Vail Telegraph is the RELAY, all else is secondary. By replacing the ink pen of the first telegraph "receiver" with a solenoid-activated key/switch, a whole new circuit can be created to EXTEND THE LENGTH of the original one, this time with another battery (very primitive in 1844) that could extend the whole telegraph path fourfold then... for the equivalent of "positive copy" using more modern terms. This worked remarkably well for its time, was reasonably economical then, and the ink pen traces could be "read" with very little training by unfamiliar "operators." Note: All "telegraphers" were required to read-write English (or their native language for foreign adapters of the system) since the "telegarph code" was just a REPRESENTATIVE of the characters of the language. As the Morse-Vail Telegraph system spread (remarkably for its time), the ink pen tracings were replaced by acoustic "sounders," the same ink pen solenoid arms now striking some semi- resonant device to create audible clicks. Telegraph operators were now required to have good hearing as well as the (rare then) reading-writing pre-knowledge/skill. Each telegraph circuit required a telegrapher at each end, first to transpose the sender's written message into the telegraph symbolism, a second specialist at the receiving end to re-convert dots and dashes to the written language readable by the recipient. The concept of the RELAY applies to radio by simply replacing the wire lines with the electromagnetic waves of radio, the transmitter controlled by the telegraph key switch, the radio receiver having some sort of acoustic sounder equivalent (nearly always headphones due to lack of amplification). Early radio was exceedingly PRIMITIVE, totally lacking in active amplifying devices such as the vacuum tube triode. Spark- discharge damped-wave-oscillation "transmitters" were their own "BFOs" for primitive "receivers" so that a receiving operator could discern the on from the off by the growl of the spark transmitter. This was stone-age technology hardly different from the primitive electrical lines of 1844. Primitive "information compression" had already begun in wireline telegraph systems, everything from short-form numbers for common salutations ("73" for written 'best regards') to five-character groups standing for entire sentences (common in commercial communications such as in the many-edition Bentley's Commercial Code books). With the beginnings of radio (heartily endorsed by the maritime people as something they never had before - over-the- horizon-communications!) came a whole new set of shorthand such as "Q" and "Z" 'codes' standing for whole phrases and sentences. [Q and Z are least-used English language letters, thus would be less confused with English words beginning with those letters]. Information compression had arrived although it was attributed to the "magic" of the telegraph, a misattribute but advantageous to the boosters of the new "technology" of radiotelegraphy. Lurking off to one side of this new "miracle technology" called radio was the teleprinter. Teleprinting sought to find a direct link from sender to receiver by dispensing with human specialists of telegraphy...for security reasons, for personal reasons, for an increase in communications time (cutting down the transposing and decoding in manual telegraphy). Work on development of teleprinting had already begun in the mid-1800s, hampered more by machining capability and mechanical devices than the primitive electricity of its time...but utilizing character codes each having the SAME length of time. The end of teleprinting experiments showed that was a necessity to permit automatic decoding of teleprinter signals at the receiving end. That equal-time coding can't be grasped intuitively except by comparisons to unequal-time codings such as "morse code" or even the human languages spoken-heard. Human languages have HIGHLY UNEQUAL lengths of time to convey information. The exact reasons are not fully known but it is a common fact...yet everything from emotions to complex abstract concepts can be communicated by human languages (whether or not the receptor is able to comprehend any of them). It has been suggested that the HIGH REDUNDANCY of human speech (and its written form) is a form of "error detection"...or the ability to "work through QRM or QRN in more modern radio terms." The end result is that spoken and written languages take a lot of time just to communicate. This is a sidelight to information coding, applicable but not a prime example of it. Teleprinter equal-time-per-character encoding/decoding has definite advantages for separating communications from noise. Noise is random. Signals are repetitive. Machines and circuits can separate the two logically. In addition, the equal-time- per-character timing allows actual noise-distortion-CORRECTION by logic circuits, either in-line or off-line. No long-time multiply-redundant information transfer is required. Such can be done by mere doubling of teleprinter character code times to include parity error-detection and correction bits. While teleprinting is also a representation of a written language, the SAME shorthand that was applied to "morse code" can be applied to teleprinting. Note: There is much "noise" (largely QRM, not QRN) from manual telegraphers in the form of myths and "magics" of telegraphy that obscured the advantages of teleprinting. This derived, perhaps, because telegraphy (simpler in technology) came first and thus had a chance to establish its PR basis. Another, more subtle, was that the speed, security, and relative economy of teleprinting caused business, commerce, and governments to eventually displace manual telegraphy with teleprinting. All of those "downsized" manual telegraphers were lacking a trade to ply their specialized skills. "Radio" appeared just in time to rescue many of those manual telegraphers, give them new jobs. By the 1930s teleprinting was the mainstay of written communications worldwide...despite the insistance of manual telegraphers that this was not so and thus generating so much man-made QRM. Teleprinters could operate for hours on end at equivalent 60 WPM rates then, needing no breaks for sleep, ingestion of food, or elimination of wastes...just feed them paper and ink ribbons, oil them once in a while, and they can run 24/7 if needs be. Segue to 1915, AT&T, the first vacuum tubes, and the first real "radio." John Carson of AT&T showed his mathematical equations describing the spectral contents of the three basic carrier wave modulations: Amplitude, Frequency, and Phase. Amplitude modulation is doubly redundant in the spectrum (but does not need to remain that way to convey information). One modulation sideband could be eliminated without losing any information! AT&T applied that to wired long-distance lines to create the first use of "single sideband." Primitive information compression but yet true information compression (of an analog kind). Advance to 1948, keep AT&T in the picture, add hundreds of researchers on Information Theory (sparked by Shannon's Law) and cryptology and the basics of logic circuits (using tubes as Athanasof's Ohio State U. first computer did) and Information Theory spreads in a mushroom of megatons of new capabilities. Bell Labs announces the birth of the transistor, the new messiah for all electronics. In the next two decades the "modem" is born...first at a relative snail's pace of 300 WPM equivalent...then 1200 WPM...then on to 2400 WPM...until finally beginning to nudge the limit of Shannon's Law at a rate equal to 56,000 Words Per Minute! [five 10-bit ASCII characters plus an equal time space make up a "word" here] Recall that basic AM was described in 1915. But, a common plain old telephone line has a bandwidth of only about 3 KHz (slightly more but it drops off rapidly after 3 KHz). Sending 56 THOUSAND anythings per second is "impossible?" No, it is established fact and nearly everyone in here does that every time they log onto an ISP. What a 56K modem does is to COMBINE both AM and PM in a digital way, add a soupcon of Information Coding in an elegant way in silicon hardware and voila(!) a seeming "impossibility" is proven fact. No "magic." Just clever (I'd say Machiavellian) innovations on using already proven laws to accomplish this "impossibility." A 56K modem principle of operation is NOT intuitive...except maybe to an electronic genius (I am not such). It requires familiarity with many different areas of existing technology that are not classical "radio" (that being old-time analog only circuitry of the 1930s-1940s). The only impossibility is trying to describe How It Works in a short message; it isn't possible in a long message, even with binaries allowed (not allowed in this newsgroup). Yet it WORKS. Daily. By the hundreds of thousands worldwide every minute. The technical details are Out There for those that wish to study it. Immediately the key-banging beepers will shout "that isn't ham radio!" It is definitely NOT the "ham radio" of the 1930s. Ham radio of then didn't have RTTY nets, let alone "computers" of today to arrange QSOs via the Internet. :-) But, the PRINCIPLE of Information Coding/Theory applies and the 56K modem is a ubiquitous example of today. SCALING of RATE does apply in any Information Coding/Theory. One can go lower in rate, keep the bandwidths narrow as the minds of those stuck in 1930s technology. Look at PSK31. PSK31 was devised/innovated/elegantly-conceived by Peter Martinez, G3PLX. It is capable of 30 WPM sustained rate equivalent in a narrowband space no wider than that used by a manual radiotelegraph circuit. Teleprinting. The modem is in hardware-software, not the operator's wetware. Martinez displayed a willingness to experiment, to try out the new, to innovate, as he did three decades before using the polyphase network to generate SSB (in Radio Communications magazine of 1973, I have copies of that). SCALING of rate and some clever adaptations of Coding Theory did the trick. It works. But, it took a LONG time to appear over on this side of the Pond. Hams in Yurp tried it out first. Ham-wise, the much- ballyhooed "Yankee Ingenuity" was nowhere to be found...nor the courage to TRY...all were too busy talking of their "radiosport" scores and certificate awards (suitable for framing) and telling tall tales of their "pioneering the radio arts" (by others done much earlier). American ethos (and mythos) were all centered around manual morsemanship. Why would (as Coslonaut and Flint) anyone WANT to send a half-Gigabyte streaming DVD data on HF?!?!? Ridiculous. But...what CAN be done in the narrowbanded, marrowminded playground of HF is DATA of many kinds. "PicturePhone" video, perhaps, slow-speed imagery so that everyone can sit around their ham shacks and admire each others' radio gear? Can be done in the spectralspace of a SSB phone signal. Digital Radio Mondial is now broadcast on HF from Europe and Asia in over two dozen programs each day. It is digital on HF, can be digital on LF, MF, and VHF, all without taking more spectral space than an AM broadcast. It works, despite the ignorant protestations of narrowbanded narrowminded amateurs emphasizing the glory and nobility of morsemanship "working through when nothing else will" in usual brags. A possibility of what can be done is 1200 Baud (1200 WPM) data streamed through a bandwidth of 250 Hz using a combo of amplitude and phase modulation...the equivalent modem being the RF source. Perhaps 2400 WPM in a 500 Hz BW, either data rate faster than what is normally done now on HF and, by experience, quite fast enough for BBS downloading and message handling. It could make the ballyhooed "NTS" a force equal to its overblown reputation. Such will not be accepted by the narrowband, narrowminded crowd who will demand seeing the Blessing of the league first, then ads in QST featuring peripherals at a given price, before believing it is possible. Even then they would not understand anything but the ads in QST. Now, all you have to do is replace your phone line with a rf signal and you have the same thing between two stations. Not only should a child realize this is possible, but anyone arguing different should be given a three day mental examination. The very first radios did exactly that to wired telegraph systems. The vaunted ARRL started that way...actually doing the equivalent of hacking commercial telegraph systems (one has to read the ENTIRE league history in order to find that gem but it is there). But, radio amateurs STOPPED there and very few went further. The league did much the same. No. I know your game far too well mike, you are sneaky and underhanded. You seek to manipulate the less technical savvy into thinking simple things are impossible just because they are NOT happening on ham radio. The olde-fahrts (chronological or mindset) are the ultimate hobbyist conservatives. Anything new/revolutionary must meet some kind of "test in battle" to "prove its worth." [and, of course, have such product ads in QST as double proof] No. Truth is you are reaping just what you have sown, you have resisted change and chased off all the younger minds who would bring change with them, then you sent and tap on ancient brass keys (probably vibroflexs from the 70's in reality) and convince yourselves you are doing a "service", you are doing a service alright, it is called a "snow job!" But...But...they have "qualified" by federal test! :-) They are federally authorized to turn their mighty stations' HF carriers ON and OFF in that epitome of all communications modes, morse code! And READ the same signals without anything but a simple receiver! Deus ex machina meets state-of-the-art! They have TITLES! [certificates suitable for framing to amaze their family, friends, and neighbors] Morsemen are the TOP Grade! They have reached the ULTIMATE in upgrading! They are AMATEURS, far greater and far better than any evil (hock a loogie to them) professionals in radio! They must be because they say they are...! :-) |
#197
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Hey Kim.....so what?.....At least I didn't pay (how many bux???) for a
callsign that brings sham on yourself. How you like that? Dan/W4NTI "Kim" wrote in message ... "Dan/W4NTI" wrote in message hlink.net... Very impresive indeed Lennie. Got any proof? Your the one that demand proof all the time....put it up right here. You have a scanner, right? "impressive" You're "demands" I never had a need for the 1st or 2nd commercial. Most to all of my electronics technicial work was done with military contractors, or companies that had a 1st ph there already. Of course you do realize that all the first pnones and seconds were just dropped away. So they really didn't amount to much anyway. Of course, pnones? Sorta like the ham tests of today. And hey good deal on passing the on-line tests of today. Pre teen age children do the same with ease. What does that tell you Lennie? And, hey, you, Lennie? I don't belong to the VFW Lennie. They didn't want any Vietnam Vets to join a few years ago (course they want us now), so I gave them their wish. I am a lifetime member of the DAV however. Oh you know them don't ya Lennie? Only way to get in is to be disabled while in military service and have a service connected rating. VFW, Lennie. ('course...) DAV, however. Oh, ya, Lennie? in, is We don't have a local branch I'm sorry to say. I may join with the Vietnam Veterans of America, ain't decided just yet. See ya. Dan/W4NTI branch, I'm. So, several posts, with typical human error. Is that ignorance of the very language you speak, Dan? Remember how you go off on tirades all the time about my "ignorance" of ham radio. Payback is hell, ain't it? I'll quit now. I made my point, even though you'll be indignantly opposed to it. Kim W5TIT ![]() |
#198
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Slow Scan Television is not dead. Tune into 14.230 and/or 14.233 and you
will hear all sorts of it. Please get your facts right before ranting. Dan/W4NTI "John Smith" wrote in message ... Mike: "Amateur TV" or SSTV is dead, replaced by much newer technology which, it seems, most hams are ignorant of and have not implemented yet (you can still see SSTV in museums run by private hams--i.e, their "radio shack" and in current use by a few "dinosaur hams.") The technology is on the shelf, so I take it your real question is, "How come no one has asked/petitioned the FCC to use a "real" video mode on amateur radio yet?" And, if so, if that is your question, I fail to come up with a good answer--but like I stated earlier, listen to some of the data streams you hear on VHF/UHF/SHF--those sound faster than 300 baud modems, don't you think? Or, maybe it is just my imagination? Gee, I never thought of it, you don't suppose a some of those are freebanders, do you? grin You do know we are all going to digital TV soon, don't you? I mean digital broadcast TV, surely by then the hams will take the hint, don't you think? John "Mike Coslo" wrote in message ... RST Engineering wrote: Did anybody else catch the scatalogical implications of the mis-spelling? But I'm waiting to catch any technological solution to the digital image transmission problem at hand. I read much invective. I read very little that is tangible. Not even how modern video compression techniques could be applied to Amateur TV. *That* is one area in which some advances could be made. But it looks like invective is what we have to settle for. - Mike KB3EIA - |
#199
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Yep, just like car shows, you see a few model A's there too.
John "Dan/W4NTI" wrote in message hlink.net... Slow Scan Television is not dead. Tune into 14.230 and/or 14.233 and you will hear all sorts of it. Please get your facts right before ranting. Dan/W4NTI "John Smith" wrote in message ... Mike: "Amateur TV" or SSTV is dead, replaced by much newer technology which, it seems, most hams are ignorant of and have not implemented yet (you can still see SSTV in museums run by private hams--i.e, their "radio shack" and in current use by a few "dinosaur hams.") The technology is on the shelf, so I take it your real question is, "How come no one has asked/petitioned the FCC to use a "real" video mode on amateur radio yet?" And, if so, if that is your question, I fail to come up with a good answer--but like I stated earlier, listen to some of the data streams you hear on VHF/UHF/SHF--those sound faster than 300 baud modems, don't you think? Or, maybe it is just my imagination? Gee, I never thought of it, you don't suppose a some of those are freebanders, do you? grin You do know we are all going to digital TV soon, don't you? I mean digital broadcast TV, surely by then the hams will take the hint, don't you think? John "Mike Coslo" wrote in message ... RST Engineering wrote: Did anybody else catch the scatalogical implications of the mis-spelling? But I'm waiting to catch any technological solution to the digital image transmission problem at hand. I read much invective. I read very little that is tangible. Not even how modern video compression techniques could be applied to Amateur TV. *That* is one area in which some advances could be made. But it looks like invective is what we have to settle for. - Mike KB3EIA - |
#200
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Dave Heil wrote:
Mike Coslo wrote: John Smith wrote: Mike: "Amateur TV" or SSTV is dead, replaced by much newer technology which, it seems, most hams are ignorant of and have not implemented yet (you can still see SSTV in museums run by private hams--i.e, their "radio shack" and in current use by a few "dinosaur hams.") Okay, John, I understand completely where you are coming from. I ask for no more. It is interesting that "John Smith" made the same error that Len made some time ago. Amateur TV and SSTV are not at all the same thing. For that matter, neither are dead. ATV is quite alive and SSTV is simply implemented differently, via the use of soundcards. Correct. SSTV is hardly TV at all, being still images. And ATV is indeed the transmission of moving images, and there is a very good reason that it is at UHF frequencies. This link may be of some help: http://news-server.org/n/ny/nyquist_...g_theorem.html - Mike KB3EIA - |
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