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What I do is tune the antenna using an electrical half wavelength of coax cable between the antenna and the antenna analyzer. This assure the true antenna impedance is what is being read by the analyzer. After tuning is done I remove the half wavelength coax and insert whatever length is necessary to get from the antenna to the radio. In doing so I have never had the SWR change when swapping cables.I just used some cheap RG-8X and made up some tuning cables for each of the ham bands for 80m and up.Actually I made lengths up for 6m, two for 10m (when joined together they work for 20m). One 10m and the 6m work well for 15m as it's close enough. I also have one for 40m and another for 80m. I bought a couple 500 foot reels of RG-8X coax from Radio Shack on a close-out sale for five cents a foot so I couldn't go wrong.

<blockquote data-quote="Captain Kilowatt" data-source="post: 248114" data-attributes="member: 39"><p>What I do is tune the antenna using an electrical half wavelength of coax cable between the antenna and the antenna analyzer. This assure the true antenna impedance is what is being read by the analyzer. After tuning is done I remove the half wavelength coax and insert whatever length is necessary to get from the antenna to the radio. In doing so I have never had the SWR change when swapping cables.I just used some cheap RG-8X and made up some tuning cables for each of the ham bands for 80m and up.Actually I made lengths up for 6m, two for 10m (when joined together they work for 20m). One 10m and the 6m work well for 15m as it&#039;s close enough. I also have one for 40m and another for 80m. I bought a couple 500 foot reels of RG-8X coax from Radio Shack on a close-out sale for five cents a foot so I couldn&#039;t go wrong. <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f600.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":D" title="Big Grin&nbsp; &nbsp; :D"&nbsp; data-smilie="8"data-shortname=":D" /></p></blockquote><p></p>

[QUOTE="Captain Kilowatt, post: 248114, member: 39"] What I do is tune the antenna using an electrical half wavelength of coax cable between the antenna and the antenna analyzer. This assure the true antenna impedance is what is being read by the analyzer. After tuning is done I remove the half wavelength coax and insert whatever length is necessary to get from the antenna to the radio. In doing so I have never had the SWR change when swapping cables.I just used some cheap RG-8X and made up some tuning cables for each of the ham bands for 80m and up.Actually I made lengths up for 6m, two for 10m (when joined together they work for 20m). One 10m and the 6m work well for 15m as it's close enough. I also have one for 40m and another for 80m. I bought a couple 500 foot reels of RG-8X coax from Radio Shack on a close-out sale for five cents a foot so I couldn't go wrong. :D [/QUOTE]

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