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On Mon, 15 Feb 2010 07:27:04 -0800, Ron Wanttaja
wrote: : Which reminds me: I fly out of a civil field in a notch of the zone round a military base - where a digital radar upgrade has recently appeared. I notice that with my mode C active, I seem to be able to hear an interrogation as a click as well as see a visual interrogation flash. These days, I don't get a repetitive once a revolution style interrogation, but rather a string of clicks when I am inbound (i.e a threat to military types which do have squitter) in my headset tuned to the CTAF The click is most likely your transponder replying to an interrogation and likely just coupling though the avionics power supplies, but it might also be RF coupling. =-=-=-=--=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-= :0) All the more reason to safeguard your head from "RF COUPLING". You can thank Julian Huxley (1927) and Wikipedia for the following: A tin foil hat is a piece of headgear made from one or more sheets of aluminium foil or similar material. Alternatively it may be a conventional hat lined with foil. Some people[who?] wear the hats in the belief that they act to shield the brain from such influences as electromagnetic fields, or against mind control and/or mind reading; they also serve to attempt to limit the transmission of voices directly into the brain. Scientific basis The notion that a tin foil hat can significantly reduce the intensity of incident radio frequency radiation on the wearer's brain has some scientific validity, as the effect of strong radio waves has been documented for quite some time.[2] A well-constructed tin foil enclosure would approximate a Faraday cage, reducing the amount of (typically harmless) radiofrequency electromagnetic radiation inside. A common high school physics demonstration involves placing an AM radio on tin foil, and then covering the radio with a metal bucket. This leads to a noticeable reduction in signal strength. The efficiency of such an enclosure in blocking such radiation depends on the thickness of the tin foil, as dictated by the skin depth, the distance the radiation can propagate in a particular non-ideal conductor. For half-millimetre-thick tin foil, radiation above about 20 kHz (i.e., including both AM and FM bands) would be partially blocked, although tin foil is not sold in this thickness, and numerous layers of tin foil would be required to sustain this effect |
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![]() "Barnyard BOb" wrote All the more reason to safeguard your head from "RF COUPLING". You can thank Julian Huxley (1927) and Wikipedia for the following: A tin foil hat is a piece of headgear made from one or more sheets of aluminium foil or similar material. So that has been your problem all along? You have not been wearing your tin hat, BoB? It certainly would explain why you are able to correct "certain other" people's spelling mistakes and such. You have had your brain hooked into the machine world, and in your case, it must be hooked into a word processor. ;-)) -- Jim in NC |
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On Thu, 25 Feb 2010 00:25:15 -0500, "Morgans"
wrote: "Barnyard BOb" wrote All the more reason to safeguard your head from "RF COUPLING". You can thank Julian Huxley (1927) and Wikipedia for the following: A tin foil hat is a piece of headgear made from one or more sheets of aluminium foil or similar material. So that has been your problem all along? You have not been wearing your tin hat, BoB? It certainly would explain why you are able to correct "certain other" people's spelling mistakes and such. You have had your brain hooked into the machine world, and in your case, it must be hooked into a word processor. ;-)) -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- No hat and no heart.... That B me, sir! ![]() ~ Barnyard BOb ~ Con-'TIN'-uing towards 56 years of licensed power flight! |
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Thread | Thread Starter | Forum | Replies | Last Post |
If all midair collisions were eliminated... | Jim Logajan | Piloting | 138 | February 19th 10 11:20 PM |
FAA Soaring Forecasts being eliminated? | David Neptune | Soaring | 6 | July 15th 06 05:47 AM |
clicking sound after failed start | Matt | Owning | 4 | November 2nd 05 12:36 AM |
Kids and Aviation records. I thought these were supposed to be eliminated. | Roger Halstead | Piloting | 2 | September 27th 04 07:20 PM |
When is just clicking PTT an acknowledgement? | Ben Jackson | Piloting | 35 | December 21st 03 09:18 AM |