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On Jun 16, 5:24*pm, "R.Scott" wrote:
I see all kinds of crazy matching sections in posts about 6 meter beams. *How about direct connect. *I have an A4S that has major issues in the traps and I cant find the problem (IE I opened them and cant find anything) SOOO I have a new A4S coming. Has anyone taken an old 3 elem tribander and converted it to 6 meter monobander using the direct connect. Any Issues. Would a 4 elem be better since its a long boom ? I'm pretty sure I know the answers. Just want to confirm and see if there is any reason not to direct connect rather than through a hairpin or a gamma match. Scotty W7PSK There are at least 3 reasons to use some kind of a matching network. 1. impedance transformation - usually the feedpoint impedance of a simple dipole in a yagi is not near 50 ohms so the matching system gives you an easy way to adjust that. 2. it is often easier to build an aluminum element without a center insulator and feed it with something like a gamma or T match. 3. to keep current off the feedline shield you need to go from the unbalanced coax to a balanced dipole feedpoint. gamma matches and others do that transformation for you. |
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