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#201
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Alun Palmer wrote in message . ..
I beleive in free choice. If someone wants to study a broad programme they can, but I don't beleive in forcing people to study things they don't want to, at least not beyond the age of 16, and even then only to avoid illiteracy and innumeracy. My own interests are not atall narrow, but they are eclectic. They include poetry, archaeology and languages, for example. If, however, a poetry class were to be compulsory in an EE curriculum, I feel strongly that it would be wrong. You can't force people to become well-rounded. Force feeding is a poor sort of education. I do not beleive that it is necessary to make people study unwanted classes to qualify as an institution of higher learning, more that it disqualifies the college. I'll believe that when the U.K approach to technical professional education programs is better that the U.S. approaches when U.K. technological leadership comes even close to the U.S. on a per capita or on any other basis. w3rv |
#202
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![]() "Brian Kelly" wrote in message om... "Carl R. Stevenson" wrote in message ... "Brian Kelly" wrote in message Carl check me here but wasn't it you who advocated the abandonment of all mode setasides in order to be able to run wall-to-wall spread spectrum on 20M? No ... I have pointed out that most countries of the world do not have "by-mode" sub-band allocations in their amateur regulations and it doesn't seem to cause any real problem. Not the point and most of us were well aware of the differences in band/mode edges. I also (as did Gary Coffman, independently) 'nother sweetheart . . . I don't know about "sweetheart" ... but Gary is a good ham and quite technically astute from my observation. I wish he was still around here ... postulate a strawman design (but something feasible, never the less) for a system that, in the 150 kHz of CW/data sub-band on 20m could support a very large number of 20 wpm Morse-equivalent QSOs with virtually no interference. That was immediately rejected by Morse fanatics, What's this frigging "Morse fanatic" nonsense? I'm certainly no "Morse fanatic", I probably spend as much time on an annualized basis with a mic in my mouth as I do running CW. I use Morse and I support the use of and testing for Morse. This particular non-fanatic immediately spotted the fallacies and impossibilities in your posts on the topic as they relate to any mode which occupies an entire ham band and is overlaid/underlaid on narrow modes particularly under weak signal condx. This is not fanaticism. This is the same reaction some hugely overwheming majority of the active hams today would reject on smell or sight. Including the technically savvy amongst us. More like *particularly* the technically savvy. The "strawman designs" that Gary and I postulated did NOT contemplate the use of SS across the whole band as an "underlay." The modulation was completely different, with a fair amount of coding. who said something like: "We don't want no stinking keyboard mode." (My response was to make Morse I/O a user interface option. Still rejected.) "The fun of it is digging the weak ones out of the noise." (My response was, "You want channel impairments? No problem. I can program all sorts of simulated channel impairments into the system to make copying as hard as you want ... without having to trash the underlying, reliable communications system." Still rejected.) Exactly and none of it flew then and it never will. Why? ... if it looks to the user EXACTLY as "traditional Morse" one would not be able to tell the difference (and therefore should have no logical, rational reason for rejecting it). The idea is that the "challenge" that some relish can be provided, as I said, without "trashing" the underlying, reliable communications system. You don't have to worry yourself about writing any simulators, sophisticated contest simulator programs have been around for years, all the predicatble parameters can be adjusted to suit the intensity of the pileups, QSB, QRN, code speeds, whacky callsigns, helluva lotta fun to play with. They also serve a very valuable role as contest logger and computer station control traininmg wheels. In the end they're neat electronic ping-pong games but IT AIN'T FRIGGING RADIO. Nobody is gonna go play electronic ping-pong so that you and Coffman can play band edge to band edge. I *was* talking about RADIO ... a system that would communicate over distances via radio ... just more reliably ... and THEN adding the impariments ("challenge") at the receiving end to satisfy those who "like to dig the weak ones out of the noise/QRM." transmit data reliably over transcontinental distances ... with power outputs on the order of 10 mW ... as an "underlay" to existing services that don't even notice that they are there. Times how many stations? Quite a few, but to be honest I don't know the exact number (and if I did, I couldn't say). QRPP PSK31 has done the same tricks. But PSK doesn't clobber the whole band, doesn't require the development of new equipment, didn't require a radical R&O to get on the air and can be done for the cost of some audio cables at most ham stations. I notice that TAPR has given up trying to get spread spectrum on the air. Nobody in TAPR cares enough about SS to work thru the bugs. There's a loud statement about ham SS. IMHO, TAPR's SS effort was doomed from the start by being overly complex. Carl - wk3c |
#203
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Alun Palmer wrote in message . ..
Well, he's clearly Indian, and I'm British, so it wouldn't surprise me if we share some views in common and don't buy into the received wisdom of the US of A. Alun, what a curious statement. What does being Indian and British, and not American, that allows you to have some views in common? Brian |
#206
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(N2EY) wrote in message . com...
(Brian) wrote in message . com... (N2EY) wrote in message . com... (Brian) wrote in message . com... (N2EY) wrote in message ... In article , (Brian) writes: (N2EY) wrote in message ... In article , (Brian) writes: Still no citation from Arnie concerning his claim that NCI is on record for less technical exams. Still no answer from you concerning these questions about your alleged /T5 operation: What callsign was used? What rigs and antennas were used? Who did the equipment belong to? What amateur bands and modes were used? What countries and continents were worked? How were the QSLs delivered? Why is it alleged? Because you haven't provided any information about or confirmation of your alleged operation. Then how do you know about it? You have claimed here and elsewhere to have operated /T5 about a decade ago. But you provided no details, even when directly asked. So any reasonable person has cause to be skeptical. Lemme think this through. After you and several minions I don't have any "minions". Perhaps they were bunions. have performed an exhaustive search concerning my operation in Somalia, and having turned up nothing, you want me to corroborate my own operation so that you'll be less skeptical? Nope. I and some others have asked some basic, simple, straightforward questions about your alleged /T5 operations. After having exhausted all other venues. You have repeatedly avoided answering any of them. Yes, that is correct. But if you do your research you'll find I have stated much of what you asked in previous posts to rrap. Get to work. Ha! That's a good one. Go ahead and believe what you want to believe. You will anyway regardless of anything I could say. Why don't you just answer the questions? How is it that you didn't believe me then, but you're willing to believe me now? I just don't get it. To be honest, I don't think there is any answer that will satisfy you. Brian |
#207
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(N2EY) wrote in message . com...
(Brian Kelly) wrote in message . com... "Carl R. Stevenson" wrote in message ... Carl check me here but wasn't it you who advocated the abandonment of all mode setasides in order to be able to run wall-to-wall spread spectrum on 20M? Read that sentence carefully: "I *personally* would hate to see the digital/CW sub-bands overrun by SSB." Spread spectrum isn't SSB. Yeah, I saw it and passed. There's just so much a body has time to "handle". SS is OK on the HF ham bands but BPL is bad. Beats me. The rallying cry I recall hearing was "no setasides for legacy modes"... What the hell is the definition of a "legacy mode" anyway? The discussion you recall, Brian, was an exchange between Carl and either KE3Z or W1RFI (halfheimer moment has me mixing them up, but I think it was Jon) here some years back. IIRC, Carl thought that HF DSSS (direct-sequence spread spectrum) could be overlaid atop, say, 15 meters. His opponent pointed out that even a QRP station with a simple antenna would lay down an increased noise level to "narrow-band" users for miles around if that were allowed. Ayup. Some basics: Suppose Amateur A operates a 100 watt 15 meter SSB rig into a decent vertical. As an aside there is no such thing as a "decent" vertical if used above 40M. Let's say he is S9+20 dB or louder over, say, a 5 mile radius, and his signal is 2.5 kHz wide. That is, a 2.5 kHz wide rx picks up almost all of the signal Amateur A transmits. (Does anybody see anything amiss with the above numbers?) Nope. Now suppose Amateur A switches to DSSS and spreads that same 100 watts over 250 kHz of the band. For mathematical simplicity, let's assume the power is equally distributed over the 250 kHz, though in reality it will drop off towards the edges and be highest in the center. A 2.5 kHz receiver will now intercept only 1% of that DSSS signal, because it is 100 times wider than the rx passband. So the DSSS signal sounds like noise, but its level is 20 db lower - S9. If Amateur A drops his power to 1 watt, the noise will drop 20 dB more - to about S6. OR, in the cw setasides where 4-500 Hz filters are commonly used the received energy from SS signals would be reduced by 80% vs. the case with the 2.5 Khz ssb filter. Still ridiculous. So we have an S6 noise level within the above area over 250 kHz of the band from ONE station running 1 watt. Who sez they would only run one watt and how many of 'em on the air simultaneously would it take to (fill in the blank). Spread the signal over the entire band instead of 250 kHzand the noise level drops less than 3 dB. How much weak-signal DX you gonna work with an S5 noise level over the entire band? Zilch. I routinely work stations which don't even flick my oversensitive zero-inertia S-meter into the first LED segment. Whatzzat if you believe S-meters, an SŲ?? 25-30 dB weaker than the SS signal? Note also that if propagation is decent, it's not unusual to hear S9+20 dB signals from 100-watt-and-simple-antenna stations hundreds or thousands of miles away. What if each one of those signals dumped its own S5+ noise level on you, even though they were running 1W out? The band would be rendered useless for the hordes by anybody running SS and that's why it ain't never gonna happen in our lifetimes. 73 de Jim, N2EY w3rv |
#208
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Mike Coslo wrote in :
Alun Palmer wrote: Mike Coslo wrote in some snippage Alun Palmer wrote: I do not beleive that it is necessary to make people study unwanted classes to qualify as an institution of higher learning, more that it disqualifies the college. You must be related to our friend Vipul! At least you think alike. - Mike KB3EIA - Well, he's clearly Indian, and I'm British, so it wouldn't surprise me if we share some views in common and don't buy into the received wisdom of the US of A. Come on, Alun. Let's not go all nationalistic on us here. Can you predict what you will make use of in your career? Right now, I am making full use of my art classes, my technical classes, my careerlong professional development, and all the other classes I took, even though some seemed irrelevant at the time. - Mike KB3EIA - I have no beef against your EE degrees. Given that they are a whole year longer than ours I'm sure you can afford to cover irrelevant stuff without missing anything important. I just feel sorry for the poor students who have to sit through it, that's all! |
#209
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Mike Coslo wrote in :
Alun Palmer wrote: I don't beleive either academic degrees or ham licences should require unnecessary stuff, that's all. Tell me what shouldn't be taught. - Mike KB3EIA - I'm sure you can work it out |
#210
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