Marconi; all i was asking was if anyone else had any luck tuning their antenna on the ground. Thats all. Im so sorry im not a high and mighty tech or whatever and at your level. Alot of your posts are above most everyday CB users like myself and most of the stuff you talk about is none of my concern anyways... IIRC, you used to give me a hard time on Uncle Jims forum back in the day whenever id ask antenna questions.. Just a rant....
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Tuning a beam by sitting it on its reflector
- Thread starter Zman
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I just made you the victim. :thumbdown:
BTW, you don't follow good suggestions either and I told everyone, I jumped the gun. :headbang
I will remember to never respond to your remarks or post again even if <gotproof>.
We go back that far? What was you handle back then, I never changed mine?
I must have really left an impression on you, but I don't remember you from squat.
Bye!
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gee, ... that only took ONE post for you to change your mind.<gotproof>
BTW: you need to learn the difference between your (incorrect) term "phasing" and the (correct) term "mutual inductance/capacitance" re-inforcement which is a function of element spacing dimensions. thats how a YAGI is designed,.. to REINFORCE the radiated RF from element to element and thus create gain/rejection.
changing the spacing of the elements does NOT in any way change the ACTUAL phase directly,.... it does change the inductance/capacitance, which does change the induced currents.
an element can be made either inductive or capacitive. If the parasitic element is made inductive it is found that the induced currents reflect the power away from the parasitic element. This causes the RF antenna to radiate more power away from it.
An element that does this is called a reflector. It can be made inductive by tuning it below resonance. This can be done by physically adding some inductance to the element in the form of a coil, or more commonly by making it longer than the resonant length. Generally it is made about 5% longer than the driven element.
If the parasitic element is made capacitive it will be found that the induced currents direct the power radiated by the whole antenna in the direction of the parasitic element.
An element which does this is called a director. It can be made capacitive tuning it above resonance. This can be done by physically adding some capacitance to the element in the form of a capacitor, or more commonly by making it about 5% shorter than the driven element.
First off,Marconi and Zman, how about you guys keep the past dirt from other forums off this one. OK? If you guys have issues we do not need it to aired here. Thanks in advance for your cooperation.
Just my guess but I am thinking the use of the term "phasing" may have been in reference to whether the redirected wave was adding too (in phase) or detracting from (out of phase) the main incident wave. Changing the spacing does affect how that redirected wave interacts with the incident wave as changing the spacing will change the signal strength even if the element is already longer/shorter.that is more an issue of coupling than in/out of phase like you said. Spacing adjustments and overall lengths seem to be more critical the closer you are to the driven element however. Notice that some antennas have several director elements the exact same length near the front of the antenna and also have equal spacing. The last eight elements on my 13B2 have the same spacing and the last six elements are all the same length.
Just my guess but I am thinking the use of the term "phasing" may have been in reference to whether the redirected wave was adding too (in phase) or detracting from (out of phase) the main incident wave. Changing the spacing does affect how that redirected wave interacts with the incident wave as changing the spacing will change the signal strength even if the element is already longer/shorter.that is more an issue of coupling than in/out of phase like you said. Spacing adjustments and overall lengths seem to be more critical the closer you are to the driven element however. Notice that some antennas have several director elements the exact same length near the front of the antenna and also have equal spacing. The last eight elements on my 13B2 have the same spacing and the last six elements are all the same length.
Some can be positive, some can be negative...I'm positive that being negative can in some instances be positive but by being positive can lead to negativity.
Jim, you sound like you are bipolar. Positive one minute and negative the next.:laugh:
Well CK, I don't remember anything from the past that Zman referred to. That is why I asked him the question.
hookedon6, took exception to my words that I was going to stop responding to Zman's post, but I had a changed my mind after his last post. I thought maybe I owed us both a chance to mitigate our differences, if he really knew something from that far back that might be positive. But believe me, I had no intentions of dredging up some old critical issues that Zman might have conjured up in his mind...just to extend the argument further. I know no one here suspects that I might have been critical with someone at some point in time.
I told Zman that I didn't remember him from squat, so CK I suspect that the bent on your mind at the time, was to try and stop any more bad words, and that's OK.
I don't mind good arguments with sensible discussions, but I don't like this type of argumentative discussion with personal bitterness involved.
Statements and post are misunderstood all the time on these forums. I admit I don't always get the story right. Hookedon6 took exception to my use of the word "phase," when talking about a function regarding a beam antenna, so I think he might consider the word totally inappropriate...when talking about a beam. I just disagree.
To me, a beam is a phasing type device, that utilizes both, in-phase actions, and out-of-phase actions, among it various elements to create gain in one direction vs. rejection in other directions. I think modeling can show us that. Does it make any difference in results, I can't say for sure, but it would seem to me to be an important issue...that has always been my point in this discussion.
However if I were to choose which of your explanations I agree with above, I would tend to go along with your explanation CK.
Hookedon6 probably understands this issue quite well based, on other responses he has made, but we just disagree on the terms used. The principals he used are the correct physical effects to be sure, but I was using the term clearly referenced using Eznec's tabular Current Log for modeling. Here it indicates the current phase and angle deg for every segment in the antenna model. There it uses the term "PHASE" in that log...an IMO this symbolizes the electrical references to the same activity...associated with inductance and capacitance that #6 raised. So, we'll see how it goes, OK.
hookedon6, took exception to my words that I was going to stop responding to Zman's post, but I had a changed my mind after his last post. I thought maybe I owed us both a chance to mitigate our differences, if he really knew something from that far back that might be positive. But believe me, I had no intentions of dredging up some old critical issues that Zman might have conjured up in his mind...just to extend the argument further. I know no one here suspects that I might have been critical with someone at some point in time.
I told Zman that I didn't remember him from squat, so CK I suspect that the bent on your mind at the time, was to try and stop any more bad words, and that's OK.
I don't mind good arguments with sensible discussions, but I don't like this type of argumentative discussion with personal bitterness involved.
Statements and post are misunderstood all the time on these forums. I admit I don't always get the story right. Hookedon6 took exception to my use of the word "phase," when talking about a function regarding a beam antenna, so I think he might consider the word totally inappropriate...when talking about a beam. I just disagree.
To me, a beam is a phasing type device, that utilizes both, in-phase actions, and out-of-phase actions, among it various elements to create gain in one direction vs. rejection in other directions. I think modeling can show us that. Does it make any difference in results, I can't say for sure, but it would seem to me to be an important issue...that has always been my point in this discussion.
However if I were to choose which of your explanations I agree with above, I would tend to go along with your explanation CK.
Hookedon6 probably understands this issue quite well based, on other responses he has made, but we just disagree on the terms used. The principals he used are the correct physical effects to be sure, but I was using the term clearly referenced using Eznec's tabular Current Log for modeling. Here it indicates the current phase and angle deg for every segment in the antenna model. There it uses the term "PHASE" in that log...an IMO this symbolizes the electrical references to the same activity...associated with inductance and capacitance that #6 raised. So, we'll see how it goes, OK.
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Hey Peddler, you've been quite for some time.
I think Einstein might disagree, and argue bitterly with you.
I used to play Phase 10, but I lost so often I quit playing . . . now I play at phasing, and that doesn't phase me one bit.
Being quite is a positive because if I get started it would be perceived as a negative and I feel negativity is positively negative.
LMAO!!! You guys are killin me here!!! I agree that dirty laundry should be left in YOUR basement I love the things Marconi posts I find it very informative which is what this sites all about helping one another dont let yourselves get sidetracked and off topic be the bigger person if need be and bite your fingers and walk away from the keyboard for a bit. It sucks but somebody has to do it or as its been seen here before this stuff can go on forever.
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