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Bob, I don't think Jay recommended this coax idea as a cure for CMC's either. I just remember Jay having issues with CMC's while tuning his new beam, so I assumed he may have been aware of how CMC's work on the feed point during his development of his I-10K too. Maybe he ran into a similar problem or maybe he just found that the 50' line worked best by accident, or some CB guru told him something.

 

I reported to you I had some good luck using a 50' footer too. I was assuming then as well. I was never able to know his thinking. I was just thinking out loud that it could be why he mentioned the idea and the specs he gave in his manual. We can't deny he said what he said, and now I see that 50' foot feed line length tending to work best in my model too. I wouldn't be talking about Jay if I wasn't surprised at this result. Here is what he published on tuning in his manual:

 

[ATTACH]9648[/ATTACH]

 

I may try and do a video to show how this develops, if I can get it legible enough so we can see the numbers on the screen. I'll post some models shortly and try again to explain how I see this issue.

 

I gave up once when you rejected the idea as smoke and mirrors, in spite my seeing some good results and producing a couple of my Antenna Work Sheets that indicated I was able to get my match and resonance at about the same frequency. That was also in spite of the fact my old radio mentor always recommended using 50' feed line for 11 meters.

 

I know we disagree on this issue, but I thank you for your comments.