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A99 / I-MAX

BM,
1. Your First question, the coax the antenna is all radiating, by taking a field strength meter it could be plotted if you want to know!
2. Because that's what radio people do, try an make a better mouse trap, every different car or different truck that has a 1/4 wave whip is slightly different in radiating because of where the whip is place and the difference in body styles ther not the same. not much but something is different.
3. Which would you like for your antenna a 1/4 wave whip or a dummy load, if I were trying to talk across the street ether will do just fine, but if you are want to talk across town then I would take a 1/4 whip!
4. Not sure I know what TOA is but I did said to ya on another post that I found that 100' of coax sounded loudest on these three different antennas the HGP-500 the RS Crossbow .64 and the Sigma 4 ground plane antennas because its has a 100' to radiator, like the 1/4 whip works better for distance than the dummy load, I found that by checking many many stations in the club I belonged to in the the 70 & 80s over a 1000 members I checked the loudest station an asked questions found all had 100' of coax in common, 100' of coax also does something else, it gives a lower SWR that
the diver sees over a broader bandwidth because of the loss in the 100' of coax the driver see, so you are using loss to work for you neat! This can be checked with an SWR meter easily, hook the antenna to a 3' jumper then to the SWR analyzer check where a 2 to 1 SWR is above and below residence, then replace the 3' jumper with the 100' of coax an check again, then you will know why I used 100'.
Now you asked why a cable that has less shielding radiates more than one that has more, because signals changes polarity + to - and your field inside the coax the center conductor is also radiating. That was covered on the last post by using a field strenth meter to help you. I hope this has been of value to ya, I have given you the best answer I can, I have read books about radio and theory but in practice I have alway had to change something to make it work correctly, sometimes big some small but change something to get the results I was looking for 73s..............Oldtimer

<blockquote data-quote="walterb" data-source="post: 316436" data-attributes="member: 6966">A99 / I-MAXBM, &nbsp;1. Your First question, the coax the antenna is all radiating, by taking a field strength meter it could be plotted if you want to know!&nbsp;2. Because that&#039;s what radio people do, try an make a better mouse trap, every different car or different truck that has a 1/4 wave whip is slightly different in radiating because of where the whip is place and the difference in body styles ther not the same. not much but something is different.&nbsp;3. Which would you like for your antenna a 1/4 wave whip or a dummy load, if I were trying to talk across the street ether will do just fine, but if you are want to talk across town then I would take a 1/4 whip!&nbsp;4. Not sure I know what TOA is but I did said to ya on another post that I found that 100&#039; of coax sounded loudest on these three different antennas the HGP-500 the RS Crossbow .64 and the Sigma 4 ground plane antennas because its has a 100&#039; to radiator, like the 1/4 whip works better for distance than the dummy load, I found that by checking many many stations in the club I belonged to in the the 70 &amp; 80s&nbsp; over a 1000 members I checked the loudest station an asked questions found all had 100&#039; of coax in common, 100&#039; of coax also does something else, it gives a lower SWR that&nbsp;the diver sees over a broader bandwidth because of the loss in the 100&#039; of coax the driver see, so you are using loss to work for you neat! This can be checked with an SWR meter easily, hook the antenna to a 3&#039; jumper then to the SWR analyzer check where a 2 to 1 SWR is above and below residence, then replace the 3&#039; jumper with the 100&#039; of coax an check again, then you will know why I used 100&#039;.&nbsp; Now you asked why a cable that has less shielding radiates more than one that has more, because signals changes polarity&nbsp; + to - and your field inside the coax the center conductor is also radiating. That was covered on the last post by using a field strenth meter to help you. I hope this has been of value to ya, I have given you the best answer I can, I have read books about radio and theory but in practice I have alway had to change something to make it work correctly, sometimes big some small but change something to get the results I was looking for&nbsp; &nbsp;&nbsp; 73s..............Oldtimer</blockquote>

[QUOTE="walterb, post: 316436, member: 6966"] [b]A99 / I-MAX[/b] BM, 1. Your First question, the coax the antenna is all radiating, by taking a field strength meter it could be plotted if you want to know! 2. Because that's what radio people do, try an make a better mouse trap, every different car or different truck that has a 1/4 wave whip is slightly different in radiating because of where the whip is place and the difference in body styles ther not the same. not much but something is different. 3. Which would you like for your antenna a 1/4 wave whip or a dummy load, if I were trying to talk across the street ether will do just fine, but if you are want to talk across town then I would take a 1/4 whip! 4. Not sure I know what TOA is but I did said to ya on another post that I found that 100' of coax sounded loudest on these three different antennas the HGP-500 the RS Crossbow .64 and the Sigma 4 ground plane antennas because its has a 100' to radiator, like the 1/4 whip works better for distance than the dummy load, I found that by checking many many stations in the club I belonged to in the the 70 & 80s over a 1000 members I checked the loudest station an asked questions found all had 100' of coax in common, 100' of coax also does something else, it gives a lower SWR that the diver sees over a broader bandwidth because of the loss in the 100' of coax the driver see, so you are using loss to work for you neat! This can be checked with an SWR meter easily, hook the antenna to a 3' jumper then to the SWR analyzer check where a 2 to 1 SWR is above and below residence, then replace the 3' jumper with the 100' of coax an check again, then you will know why I used 100'. Now you asked why a cable that has less shielding radiates more than one that has more, because signals changes polarity + to - and your field inside the coax the center conductor is also radiating. That was covered on the last post by using a field strenth meter to help you. I hope this has been of value to ya, I have given you the best answer I can, I have read books about radio and theory but in practice I have alway had to change something to make it work correctly, sometimes big some small but change something to get the results I was looking for 73s..............Oldtimer [/QUOTE]

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