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"Bob Brock" wrote in message
... On 13 Sep 2003 04:50:38 GMT, (Jeffrey Herman) wrote: Bob Brock wrote: If you can't accept the fact that people build, sell, and buy 1/4 wave dipoles for use in UHF, get over it. Just don't try to make stuff up and post it. Again, by definition "dipole" means two current or voltage poles; it does not refer to the number of elements of the antenna. You can't have two (di-) current or voltage poles in just a 1/4-wave segment. Calling it such doesn't make it so. It takes a 1/2-wavelength for two (di-) such poles to appear. Jeff KH6O You must have replied to the wrong post. But out of curiousity, how many current or voltage poles is a "J" as in J-pole. *GASP*!!!! Bob! Don't get them going with the word i-m-p-e-d-a-n-c-e!!!! ; ) Kim W5TIT |
You must have replied to the wrong post. But out of curiousity, how
many current or voltage poles is a "J" as in J-pole. You Morron a J-Pole is a half wave ant , not a quarter wave. It appears that Brock knows nothing about ants, my guess is hes nothing more then a Dumb Down CBplusser Knuckle Dragger, at Im sure a member of NCI |
"Brian" wrote in message m... (N2EY) wrote in message ... There are already folks like W5YI campaigning for less WRITTEN testing, saying the Tech test is too hard. The Tech test And privs are insane for an entry level license. I do hope you mean the test is insanely simple and the privileges insanely high for the level of testing done. Dee D. Flint, N8UZE |
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On Sat, 13 Sep 2003 08:35:53 -0500, "Kim W5TIT"
wrote: "Bob Brock" wrote in message .. . On 13 Sep 2003 04:50:38 GMT, (Jeffrey Herman) wrote: Bob Brock wrote: If you can't accept the fact that people build, sell, and buy 1/4 wave dipoles for use in UHF, get over it. Just don't try to make stuff up and post it. Again, by definition "dipole" means two current or voltage poles; it does not refer to the number of elements of the antenna. You can't have two (di-) current or voltage poles in just a 1/4-wave segment. Calling it such doesn't make it so. It takes a 1/2-wavelength for two (di-) such poles to appear. Jeff KH6O You must have replied to the wrong post. But out of curiousity, how many current or voltage poles is a "J" as in J-pole. *GASP*!!!! Bob! Don't get them going with the word i-m-p-e-d-a-n-c-e!!!! ; ) Kim W5TIT ROTFLMAO... |
Yep, and I didn't see it specifying whether it was a half-wave or not.
Regardless of the fact I DO know how to calculate it or any fraction of a full wavelength. If the question was "What is the length of a quarter-wave dipole for 14.240Mhz?" or "What is the length of a half-wave dipole for 14.240Mhz?" or whatever then I would have answered right of the bat. Yeah, it is simple to do that formula, but to give the answer would be hard unless you gave ALL of the possibilities such as below: one-sixteenth wave @ 14.240Mhz = 4.108146 one-eighth wave @ 14.240Mhz = 8.216292 three-sixteenth wave @ 14.240Mhz = 12.324438 quarter-wave @ 14.240Mhz = 16.432584 five-sixteenth wave @ 14.240Mhz = 20.54073 three-eighths wave @ 14.240Mhz = 24.648876 seven-sixteenths wave @ 14.240Mhz = 28.757022 half-wave @ 14.240Mhz = 32.8651685 nine-sixteenths wave @ 14.240Mhz = 36.973314 five-eighths wave @ 14.240Mhz = 41.08146 eleven-sixteenths wave @ 14.240Mhz = 45.189606 three-quarter wave @ 14.240Mhz = 49.297752 thirteen-sixteenths wave @ 14.240Mhz = 53.405898 seven-eigths wave @ 14.240Mhz = 57.514044 fifteen-sixteenths wave @ 14.240Mhz = 61.62219 full wave dipole @ 14.240Mhz = 65.730337 All of the above answers would be correct (barring accidental typos), but the original poster of the question in the first place DID NOT SPECIFY. See, it is important, unless you consider ALL antennas to be exactly one-half wavelength in length. -- Ryan, KC8PMX FF1-FF2-MFR-(pending NREMT-B!) --. --- -.. ... .- -. --. . .-.. ... .- .-. . ..-. .. .-. . ..-. ... --. .... - . .-. ... As you know from studying for your Technician license (and the material also appears in the General study guide), you can calculate the length of your half-wave dipole directly knowing only the frequency. The equation is: Length in feet = 468 divided by the frequency in megahertz. Also from these same study guides, you can calculate the wavelength by the following equation. Wavelength in meters = 300 divided by the frequency in megahertz (of course if you wish you can then convert the answer to feet). Dee D. Flint, N8UZE |
Bob Brock wrote in message . ..
Kim, within a year the only debate in here about CW will be about the consequences of it no longer being required. The whining will be terrible for awhile, but like the no-code tech discussions, they will eventually disappear. Ooooh, huge, huge miscalcualtion, Brock. You give these guys way too much credit. These guys have memories like an elephant, and they will carrry the debate to their graves. Which is why I say that the only cure are the actuarial tables. They are as unyielding as the PCTA, till the bitter end. |
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