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I built this 5/8 wave and have been testing it on a short pole about 8' off the ground

[ATTACH]724[/ATTACH]

I was getting SWRs of

1.3:1 at 28.5
1:1 at 27.9
1.4:1 at 27.325
1.5:1 at 26.965

I used a coil tuning system like this

[ATTACH]725[/ATTACH]

I was satisfied with it's SWR performance, so today I moved it to the top of a pole attached to the house at about 23'.

[ATTACH]726[/ATTACH]

The only thing I changed was it's height/location and I slid a 12" piece of 7/8" round stock up inside the 1" lower section of the vertical element so it would not be crushed when I tightened down on the mounting U-bolts.

Now I can't get the SWR below 1:3 and no matter where I try to set the jumper it gets worse. The 1:3 is when the jumper is placed where coil attaches to the vertical element.

Any suggestions?

<blockquote data-quote="W9WD" data-source="post: 142000">I built this 5/8 wave and have been testing it on a short pole about 8&#039; off the ground[ATTACH]724[/ATTACH]I was getting SWRs of1.3:1 at 28.51:1 at 27.91.4:1 at 27.3251.5:1 at 26.965I used a coil tuning system like this[ATTACH]725[/ATTACH]I was satisfied with it&#039;s SWR performance, so today I moved it to the top of a pole attached to the house at about 23&#039;.[ATTACH]726[/ATTACH]The only thing I changed was it&#039;s height/location and I slid a 12&quot; piece of 7/8&quot; round stock up inside the 1&quot; lower section of the vertical element so it would not be crushed when I tightened down on the&nbsp; mounting U-bolts.Now I can&#039;t get the SWR below 1:3 and no matter where I try to set the jumper it gets worse. The 1:3 is when the jumper is placed where coil attaches to the vertical element.Any suggestions?</blockquote>

[QUOTE="W9WD, post: 142000"] I built this 5/8 wave and have been testing it on a short pole about 8' off the ground [ATTACH]724.vB[/ATTACH] I was getting SWRs of 1.3:1 at 28.5 1:1 at 27.9 1.4:1 at 27.325 1.5:1 at 26.965 I used a coil tuning system like this [ATTACH]725.vB[/ATTACH] I was satisfied with it's SWR performance, so today I moved it to the top of a pole attached to the house at about 23'. [ATTACH]726.vB[/ATTACH] The only thing I changed was it's height/location and I slid a 12" piece of 7/8" round stock up inside the 1" lower section of the vertical element so it would not be crushed when I tightened down on the mounting U-bolts. Now I can't get the SWR below 1:3 and no matter where I try to set the jumper it gets worse. The 1:3 is when the jumper is placed where coil attaches to the vertical element. Any suggestions? [/QUOTE]

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