I and other folks asked Bob what adjustments he made back in the days before he started this thread. But all I recall him saying was something similar to this, "...Eddie the results you get at your location will be different than what I get here, so my mods won't work for you."
Donald, I think you talk about actually seeing some interesting evidence that supports RF steering effects using the Sigma4 design at several frequencies. Could you give me a link or some viable reference so I can try and model this antenna and the effects you saw?
I've taken many signal reports over the years, some in error by using a switch box, and others more correctly using the same mount, coax, and radio. In my experienceds, if and when I happened to see such differences in signals like you describ...I figured it was just as likely that skip was working or an amp or a beam was making the difference vs. your claim that RF steering and/or a non apparent collinear effects was going on.
I admit that what you claim about RF steering, in general, could be possible. We hear stories of RF steering in the commercial broadcast and possibly among some ham operations. However, I have never seen any evidence that steering was going on with my Sigma 4 or for sure that is was ever 2-3 db stronger than my other CB verticals at close to the same tip height.
I've heard these claims from you, Bob, DB, Homer, and possibly some others...but I've never heard anybody try and explain how this effect was implemented, except in broad terms like you suggest.
Another question. Can you duplicate this effect whenever you wish on your Vector 4K?
I understand what you are telling us, and I too cannot explain the effects using a Sigma4 design. With your help, maybe I could model the idea along the lines your talk about when modified. Maybe my model could show similar results to the claims you guys talk about...if I knew exactly what you did to modify.
A'm I right to assume you are telling us the S4/V4K will NOT work as you describe, unless they are modified somehow?
If you have a Vector that shows 2 - 3 db better gain at 50 miles vs, the stock version, could you give me the basic dimensions used...so I could try and model the idea?
I would like to learn something new today.
Thanks for responding.