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Not so very long ago a small party of professors, Phd's, students etc., from an English univerity made an expedition to Rio specifically to investigate this apparent revolution in the very foundation of Mathematics. They returned with a new insight into how the human brain works with numbers and retired to study and then present their findings. Since then all has been silence. After they sobered up, they realized that the Brazilian Renaissance only changed the course of world thinking for 12 minutes. Ed wb6wsn =================================== More likely, out of necessity, the investigators had to buy so many cannabis-loaded cigarettes from sewer kids they returned from the expedition as confirmed addicts. ---- Reg |
Reg Edwards wrote:
More likely, out of necessity, the investigators had to buy so many cannabis-loaded cigarettes from sewer kids they returned from the expedition as confirmed addicts. Last I heard, there's no proof that cannabis is physically addicting. -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- |
If you stretch a string on a globe from London to Florida, it will show the 'great circle' route that's the shortest, and that should be your plane's path, barring storme, hurricanes, etc. You'll see that it comes really close to the eastern Canadian provinces. In fact the Avalon Peninsuala in the most eastern part of the island portion of the province of Newfoundland and Labrador, Canada, is a 'Way Point' for many transatlantic flights headed to/from Europe. Clear days Transatlantic flight con-trails, at 30,000 feet etc. can be seen almost continuously. That is why so many of the flights that were prevented from entering US air space 9/11 had to land in eastern Canada. Many US/Canada friendships were founded between grounded travellers that day and eastern and western Canadians who voluntarily accommodated them during the delay. Cape Spear near St John's is the most easterly point in North America. Marconi received the first transatlantic wireless telegraph signal near St John's in Dec. 1901. French is one of the 'Official Languages' in Canada. A significant percentage of the population, mainly in Quebec, New Brunswick, but also elsewhere in Canada, is French speaking. Many/most are bilingual. Same way Spanish is significant in the USA? The word 'Cajun' in southern US comes from the French word "Acadian"; originally inhabitants of Acadia or what is now the eastern Canadian Province of Nova Scotia. Terry. PS. Staff at the National Historic Park at Signal Hill, St. John's, which incorporates the memorial and events which celebrate Marconi's first wireless telegraph reception say that visitors unaware of the approximately 1800 miles across the Atlantic, (4.3 hours by jet to London-Heathrow) will sometimes ask "Can you see across to England/Ireland etc.". The answer is; "No, but sometimes you can see "Whales"! :-) And sometimes icebergs as well. |
AM radio reception inside passenger planes?
On Mon, 13 Dec 2004 08:47:43 -0600, Richard Harrison wrote:
Some Guy wrote: "I have no trouble receiving FM radio broadcasts on a small am/fm radio I sometimes listen to while onboard commercial jet sirliners (flying at cruise altitude), but I bever seem to be able to pick up AM radio stations. It`s just static across the AM band. Any explanation for this?" Fuselage of the airliner acts as a waveguide below cutoff frequency (where diameter is at least 1/2-wavelength). Below cutoff, attenuation soars rapidly. FM wavelength is about 3 meters. AM wavelength is about 300 meters. Propagation of FM inside the fuselage is OK. Propagation of AM inside the fuselage vanishes quickly. You need to stick the suction cups of your Zenith portable`s Wave Magnet to a window to get AM reception. Best regards, Richard Harrison, KB5WZI Years ago I could get some shortwave reception by placing the radio's whip antenna across the window and lowering the shade to keep in place (and hide the radio). MW stations were generally too weak to listen to. FM was a jumble at altitude. These days RFI from the cabin entertainment systems completely blanks out everything so don't bother trying. Be thankful MP3 players still work. -- Chuck Forsberg www.omen.com 503-614-0430 Developer of Industrial ZMODEM(Tm) for Embedded Applications Omen Technology Inc "The High Reliability Software" 10255 NW Old Cornelius Pass Portland OR 97231 FAX 629-0665 |
AM radio reception inside passenger planes?
In message , Chuck
Forsberg WA7KGX N2469R writes On Mon, 13 Dec 2004 08:47:43 -0600, Richard Harrison wrote: Some Guy wrote: "I have no trouble receiving FM radio broadcasts on a small am/fm radio I sometimes listen to while onboard commercial jet sirliners (flying at cruise altitude), but I bever seem to be able to pick up AM radio stations. It`s just static across the AM band. Any explanation for this?" Fuselage of the airliner acts as a waveguide below cutoff frequency (where diameter is at least 1/2-wavelength). Below cutoff, attenuation soars rapidly. FM wavelength is about 3 meters. AM wavelength is about 300 meters. Propagation of FM inside the fuselage is OK. Propagation of AM inside the fuselage vanishes quickly. You need to stick the suction cups of your Zenith portable`s Wave Magnet to a window to get AM reception. Best regards, Richard Harrison, KB5WZI Years ago I could get some shortwave reception by placing the radio's whip antenna across the window and lowering the shade to keep in place (and hide the radio). MW stations were generally too weak to listen to. FM was a jumble at altitude. These days RFI from the cabin entertainment systems completely blanks out everything so don't bother trying. Be thankful MP3 players still work. With a window seat, FM works OK, especially (as has been said) with the whip held close to the window. You can also get some SW reception. [I remember listening to the BBC World service at 35,000 feet.] MW AM is pretty useless (at those frequencies, the airframe is a Faraday cage). Some airlines are/were OK about using radio receivers during the flight, but I understand that these days, regardless of what the airline says, you might get challenged by some 'over enthusiastic' security guy during the normal departure security checks. About 10 years ago (before the recent troubles), I did do some listening on a UK-USA transatlantic flight. On approaching North America, I was initially surprised that the first FM station I heard was French-speaking (from Quebec, of course). I was relieved when I realised that the 'driver' had not got lost. -- Ian |
AM radio reception inside passenger planes?
Chuck Forsberg WA7KGX N2469R wrote:
On Mon, 13 Dec 2004 08:47:43 -0600, Richard Harrison wrote: Some Guy wrote: "I have no trouble receiving FM radio broadcasts on a small am/fm radio I sometimes listen to while onboard commercial jet sirliners (flying at cruise altitude), but I bever seem to be able to pick up AM radio stations. It`s just static across the AM band. Any explanation for this?" Fuselage of the airliner acts as a waveguide below cutoff frequency (where diameter is at least 1/2-wavelength). Below cutoff, attenuation soars rapidly. FM wavelength is about 3 meters. AM wavelength is about 300 meters. Propagation of FM inside the fuselage is OK. Propagation of AM inside the fuselage vanishes quickly. You need to stick the suction cups of your Zenith portable`s Wave Magnet to a window to get AM reception. Best regards, Richard Harrison, KB5WZI Years ago I could get some shortwave reception by placing the radio's whip antenna across the window and lowering the shade to keep in place (and hide the radio). MW stations were generally too weak to listen to. FM was a jumble at altitude. These days RFI from the cabin entertainment systems completely blanks out everything so don't bother trying. Be thankful MP3 players still work. One notes that you need to have permission from the plane's pilot to operate any sort of radio (including a receiver) while in flight. With receivers, the concern is with things like Local Oscillator or other leakage signals. Whether this is a legitimate concern is a topic of discussion (e.g. they've flown commercial planes with an antenna and logging spectrum analyzer in an overhead bin, and discovered that lots of folks forget to turn off their cell phones), but the fact remains that the regulations say no radios, except those permitted by the pilot in command. |
AM radio reception inside passenger planes?
Jim Lux wrote:
Chuck Forsberg WA7KGX N2469R wrote: On Mon, 13 Dec 2004 08:47:43 -0600, Richard Harrison wrote: Some Guy wrote: "I have no trouble receiving FM radio broadcasts on a small am/fm radio I sometimes listen to while onboard commercial jet sirliners (flying at cruise altitude), but I bever seem to be able to pick up AM radio stations. It`s just static across the AM band. Any explanation for this?" Fuselage of the airliner acts as a waveguide below cutoff frequency (where diameter is at least 1/2-wavelength). Below cutoff, attenuation soars rapidly. FM wavelength is about 3 meters. AM wavelength is about 300 meters. Propagation of FM inside the fuselage is OK. Propagation of AM inside the fuselage vanishes quickly. You need to stick the suction cups of your Zenith portable`s Wave Magnet to a window to get AM reception. Best regards, Richard Harrison, KB5WZI Years ago I could get some shortwave reception by placing the radio's whip antenna across the window and lowering the shade to keep in place (and hide the radio). MW stations were generally too weak to listen to. FM was a jumble at altitude. These days RFI from the cabin entertainment systems completely blanks out everything so don't bother trying. Be thankful MP3 players still work. One notes that you need to have permission from the plane's pilot to operate any sort of radio (including a receiver) while in flight. With receivers, the concern is with things like Local Oscillator or other leakage signals. Whether this is a legitimate concern is a topic of discussion (e.g. they've flown commercial planes with an antenna and logging spectrum analyzer in an overhead bin, and discovered that lots of folks forget to turn off their cell phones), but the fact remains that the regulations say no radios, except those permitted by the pilot in command. And the reality is the pilot in command of commercial aircraft has to follow the policies of his employer, most of which take the safe route of banning everything that might even remotely cause a problem. -- Jim Pennino Remove .spam.sux to reply. |
AM radio reception inside passenger planes?
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