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I don't recall this experiment. 


Do you mean you and I experimented with radial lengths on the A/P?


Did I do models or what?


OK. you never changed the cap hat, but did you have to change anything to effect the tune after it was built?


If you used your analyzer, did you keep any notes about the antenna match?


Since you were working with PVC which might have been larger diameter than the spec dimensions on the work sheet...did you compensate any?


Did your PVC A/P have a near perfect match near the middle of the CB band?


Do you have a real A/P?


I want to model using the metric spec sheet you used. But, I have hesitated on this one because the likely very wide bandwidth could allow a good match over a wide range in the real world. I'm not even sure this spec sheet was cut for the CB band in America.




Thanks again for your heads up.