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You cannot run a 5/8 (.625) or a .64 wavelength antenna without some form of matching, unless you want a high amp/radio killing SWR. All 5/8 wavelength antennas (including the .64 wavelength antennas) have some form of matching. It is not a self resonant length, nor is it a length that provides a naturally low SWR.

If you want direct feed, look at 1/4 wavelength groundplane antennas. When it comes to verticals those are pretty much your options if you insist on being able to direct feed. Perhaps a center fed dipole could be made to work as a direct fed vertical as well (thinking T2LT type antenna).

I still want to know how much power you are planning on running as you haven't answered that question yet. That knowledge can make all the difference. That being said, if you are planning on running so much power that you need a direct fed antenna system to be able to handle it, the question very quickly becomes why?

The DB

<blockquote data-quote="The DB" data-source="post: 517572" data-attributes="member: 21346">You cannot run a 5/8 (.625) or a .64 wavelength antenna without some form of matching, unless you want a high amp/radio killing SWR.&nbsp; All 5/8 wavelength antennas (including the .64 wavelength antennas) have some form of matching.&nbsp; It is not a self resonant length, nor is it a length that provides a naturally low SWR.If you want direct feed, look at 1/4 wavelength groundplane antennas.&nbsp; When it comes to verticals those are pretty much your options if you insist on being able to direct feed.&nbsp; Perhaps a center fed dipole could be made to work as a direct fed vertical as well (thinking T2LT type antenna).I still want to know how much power you are planning on running as you haven&#039;t answered that question yet.&nbsp; That knowledge can make all the difference.&nbsp; That being said, if you are planning on running so much power that you need a direct fed antenna system to be able to handle it, the question very quickly becomes why?<a href="http://hittman.us" target="_blank">The DB</a></blockquote>

[QUOTE="The DB, post: 517572, member: 21346"] You cannot run a 5/8 (.625) or a .64 wavelength antenna without some form of matching, unless you want a high amp/radio killing SWR. All 5/8 wavelength antennas (including the .64 wavelength antennas) have some form of matching. It is not a self resonant length, nor is it a length that provides a naturally low SWR. If you want direct feed, look at 1/4 wavelength groundplane antennas. When it comes to verticals those are pretty much your options if you insist on being able to direct feed. Perhaps a center fed dipole could be made to work as a direct fed vertical as well (thinking T2LT type antenna). I still want to know how much power you are planning on running as you haven't answered that question yet. That knowledge can make all the difference. That being said, if you are planning on running so much power that you need a direct fed antenna system to be able to handle it, the question very quickly becomes why? [URL='http://hittman.us'][COLOR=#000000]The DB[/COLOR][/URL] [/QUOTE]

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