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#1
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![]() "Richard Harrison" wrote in message ... Art wrote: "Again, Richard you are taking things out of context since the arrays referred to were not in equilibrium.' I noted no acceleration nor motion. As a firm believer in the conservation of energy I`m sure that the antenna, on average, received no more energy than it emitted or conducted away. That is balance or equilibrium. Art also wrote: "Terman was referring to close spaced of the parasitic form, even mentions corner reflectors." Yes, and he also mentions the Yagi array. But I believe Terman meant to say the best antenna gains of the day, for the antenna`s size, regardless of direct or parasitic drive, were obtained from corner reflector and Yagi antennas. That hasn`t changed but it certainly may. But, Kraus, whose invention, the W8JK array, has two dipole elements spaced 0.125 wavelengths apart and driven 180-degrees out of phase, certainly has no parasitic element. That was certainly on his mind when he wrote the comments on page 185 in "Antennas". On the facing page, 184, he diagrams two antennas, the W8JK and a stack of two dipoles which are driven in-phase, not out-of phase like the W8JK. Low radiation resistance is a consequence of tight coupling between the closely-spaced elements. This makes the coupling to the array likely lossy in making impedance transformations necessary to match the array to the transmission line. Kraus has some suggestions on how to make these arrays more compatible with their transmission lines. Best regards, Richard Harrison, KB5WZI I f this were a hospital you couldnt distinguish the doctors from the patients.. LMAO Jimmie |
#2
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On 22 Apr, 15:55, "Jimmie D" wrote:
"Richard Harrison" wrote in message ... Art wrote: "Again, Richard you are taking things out of context since the arrays referred to were not in equilibrium.' I noted no acceleration nor motion. As a firm believer in the conservation of energy I`m sure that the antenna, on average, received no more energy than it emitted or conducted away. That is balance or equilibrium. Art also wrote: "Terman was referring to close spaced of the parasitic form, even mentions corner reflectors." Yes, and he also mentions the Yagi array. But I believe Terman meant to say the best antenna gains of the day, for the antenna`s size, regardless of direct or parasitic drive, were obtained from corner reflector and Yagi antennas. That hasn`t changed but it certainly may. But, Kraus, whose invention, the W8JK array, has two dipole elements spaced 0.125 wavelengths apart and driven 180-degrees out of phase, certainly has no parasitic element. That was certainly on his mind when he wrote the comments on page 185 in "Antennas". On the facing page, 184, he diagrams two antennas, the W8JK and a stack of two dipoles which are driven in-phase, not out-of phase like the W8JK. Low radiation resistance is a consequence of tight coupling between the closely-spaced elements. This makes the coupling to the array likely lossy in making impedance transformations necessary to match the array to the transmission line. Kraus has some suggestions on how to make these arrays more compatible with their transmission lines. Best regards, Richard Harrison, KB5WZI I f this were a hospital you couldnt distinguish the doctors from the patients.. LMAO Jimmie- Hide quoted text - - Show quoted text - Jimmie you may reach the same age as Richard( you are nearly 80 years old aren't you) so you better start thinking ahead. There are different types of institutions you know and who knows what type you are assigned to. Art |
#3
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Jimmie D wrote:
"Richard Harrison" wrote in message ... Art wrote: "Again, Richard you are taking things out of context since the arrays referred to were not in equilibrium.' I noted no acceleration nor motion. As a firm believer in the conservation of energy I`m sure that the antenna, on average, received no more energy than it emitted or conducted away. That is balance or equilibrium. Art also wrote: "Terman was referring to close spaced of the parasitic form, even mentions corner reflectors." Yes, and he also mentions the Yagi array. But I believe Terman meant to say the best antenna gains of the day, for the antenna`s size, regardless of direct or parasitic drive, were obtained from corner reflector and Yagi antennas. That hasn`t changed but it certainly may. But, Kraus, whose invention, the W8JK array, has two dipole elements spaced 0.125 wavelengths apart and driven 180-degrees out of phase, certainly has no parasitic element. That was certainly on his mind when he wrote the comments on page 185 in "Antennas". On the facing page, 184, he diagrams two antennas, the W8JK and a stack of two dipoles which are driven in-phase, not out-of phase like the W8JK. Low radiation resistance is a consequence of tight coupling between the closely-spaced elements. This makes the coupling to the array likely lossy in making impedance transformations necessary to match the array to the transmission line. Kraus has some suggestions on how to make these arrays more compatible with their transmission lines. Best regards, Richard Harrison, KB5WZI I f this were a hospital you couldnt distinguish the doctors from the patients.. LMAO Jimmie If you are implying that Richard is incorrect in his statements and that Art has even a tiny clue about reality, you are sadly mistaken. You should study a bit about the subject before you criticize the "Doctors". tom K0TAR |
#4
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![]() "Tom Ring" wrote in message . .. Jimmie D wrote: "Richard Harrison" wrote in message ... Art wrote: "Again, Richard you are taking things out of context since the arrays referred to were not in equilibrium.' I noted no acceleration nor motion. As a firm believer in the conservation of energy I`m sure that the antenna, on average, received no more energy than it emitted or conducted away. That is balance or equilibrium. Art also wrote: "Terman was referring to close spaced of the parasitic form, even mentions corner reflectors." Yes, and he also mentions the Yagi array. But I believe Terman meant to say the best antenna gains of the day, for the antenna`s size, regardless of direct or parasitic drive, were obtained from corner reflector and Yagi antennas. That hasn`t changed but it certainly may. But, Kraus, whose invention, the W8JK array, has two dipole elements spaced 0.125 wavelengths apart and driven 180-degrees out of phase, certainly has no parasitic element. That was certainly on his mind when he wrote the comments on page 185 in "Antennas". On the facing page, 184, he diagrams two antennas, the W8JK and a stack of two dipoles which are driven in-phase, not out-of phase like the W8JK. Low radiation resistance is a consequence of tight coupling between the closely-spaced elements. This makes the coupling to the array likely lossy in making impedance transformations necessary to match the array to the transmission line. Kraus has some suggestions on how to make these arrays more compatible with their transmission lines. Best regards, Richard Harrison, KB5WZI I f this were a hospital you couldnt distinguish the doctors from the patients.. LMAO Jimmie If you are implying that Richard is incorrect in his statements and that Art has even a tiny clue about reality, you are sadly mistaken. You should study a bit about the subject before you criticize the "Doctors". tom K0TAR Not what I am implying at all, that wouldnt be funny. I only wish I knew as much about antennas as Richard. I only recently obtained copies of books by Krauss and Terman and have begin to intensify my studies of the subject. While on the subject, I obtained my first class FCC license in 73 and the material in Terman seems to fit very closly with the study material I had. Is there a connection between the test and Terman's book? Jimmie |
#5
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Jimmie D wrote:
I f this were a hospital you couldnt distinguish the doctors from the patients.. LMAO Jimmie If you are implying that Richard is incorrect in his statements and that Art has even a tiny clue about reality, you are sadly mistaken. You should study a bit about the subject before you criticize the "Doctors". tom K0TAR Not what I am implying at all, that wouldnt be funny. I only wish I knew as much about antennas as Richard. I only recently obtained copies of books by Krauss and Terman and have begin to intensify my studies of the subject. While on the subject, I obtained my first class FCC license in 73 and the material in Terman seems to fit very closly with the study material I had. Is there a connection between the test and Terman's book? Jimmie Well, then I won't comment anymore. Did you buy the license? tom K0TAR |
#6
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![]() "Tom Ring" wrote in message . .. Jimmie D wrote: I f this were a hospital you couldnt distinguish the doctors from the patients.. LMAO Jimmie If you are implying that Richard is incorrect in his statements and that Art has even a tiny clue about reality, you are sadly mistaken. You should study a bit about the subject before you criticize the "Doctors". tom K0TAR Not what I am implying at all, that wouldnt be funny. I only wish I knew as much about antennas as Richard. I only recently obtained copies of books by Krauss and Terman and have begin to intensify my studies of the subject. While on the subject, I obtained my first class FCC license in 73 and the material in Terman seems to fit very closly with the study material I had. Is there a connection between the test and Terman's book? Jimmie Well, then I won't comment anymore. Did you buy the license? tom K0TAR No I wish I had had the book then, I took a course(before Bash) at the time that also seemed to follow Terman. When I went up to Atlanta to take thes test I only thought I was giong to take the parts for the second class license and passed the test for first class also. I felt like I didnt know my own name when I was finished and had no clue whether or not I had passed even the second class portion. I really didnt believe I had. Funny thing is I have never used the license. Stiil just skiming the books but Terman seems a little elementary now and Kraus is going to require me to bone up on my calculus, something else I havent used since 1979. Hell I dont even know why I am bothering, fine cooking and ballroom dancing are much more important to me now. Jimmie |
#7
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On 22 Apr, 19:41, Tom Ring wrote:
Jimmie D wrote: "Richard Harrison" wrote in message ... Art wrote: "Again, Richard you are taking things out of context since the arrays referred to were not in equilibrium.' I noted no acceleration nor motion. As a firm believer in the conservation of energy I`m sure that the antenna, on average, received no more energy than it emitted or conducted away. That is balance or equilibrium. Art also wrote: "Terman was referring to close spaced of the parasitic form, even mentions corner reflectors." Yes, and he also mentions the Yagi array. But I believe Terman meant to say the best antenna gains of the day, for the antenna`s size, regardless of direct or parasitic drive, were obtained from corner reflector and Yagi antennas. That hasn`t changed but it certainly may. But, Kraus, whose invention, the W8JK array, has two dipole elements spaced 0.125 wavelengths apart and driven 180-degrees out of phase, certainly has no parasitic element. That was certainly on his mind when he wrote the comments on page 185 in "Antennas". On the facing page, 184, he diagrams two antennas, the W8JK and a stack of two dipoles which are driven in-phase, not out-of phase like the W8JK. Low radiation resistance is a consequence of tight coupling between the closely-spaced elements. This makes the coupling to the array likely lossy in making impedance transformations necessary to match the array to the transmission line. Kraus has some suggestions on how to make these arrays more compatible with their transmission lines. Best regards, Richard Harrison, KB5WZI I f this were a hospital you couldnt distinguish the doctors from the patients.. LMAO Jimmie If you are implying that Richard is incorrect in his statements and that Art has even a tiny clue about reality, you are sadly mistaken. You should study a bit about the subject before you criticize the "Doctors". tom K0TAR- Hide quoted text - - Show quoted text - Tom ,you should not hit Jimmie for not studying what you believe to be critical. To often you have shown yourself to be ignorant of the finer details of radiation that you are accusing Jimmie of not being knoweledgable about. Regarding what Richard stated you did not give one iota of evidence that his comments were correct possibly because you are devoid of any knoweledge around which you could consider a debate. Tom once again you show your ignorance about antennas and radiation to the World. Wasn't it you who was so vociforace in your critisisms when the MIT doctor came aboard with his mathematical analysis? Was it not you who stated you cannot add the measure of time to both sides of an equation infering that equilibrium is thus abandoned? You really should have obtained an understanding of algebra before embarking on a realm of finger pointing at the old age of the mid eighties. You can talk the talk when you prove that you can walk the walk and that can't be done if you have a crippled mind. Art |
#8
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![]() I f this were a hospital you couldnt distinguish the doctors from the patients.. LMAO Jimmie There are no Doctors, only patients. Art refers to Richard as Andy Cap, an ancient reference even to me (and I am 52). Richard takes the bait every time. Fanning the flames of borderline lunacy can keep newsgroups busy basically forever. A true perpetual motion machine. I am, of course, quoting Heaviside. |
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