I'm confused why an EFHW should need a counterpoise. If it needs a
counterpoise it isn't actually acting like an EFHW. If it needs a
counterpoise that means there isn't enough choking impedance at the
feedpoint, and it means that the feedline is radiating with the
counterpoise acting as ... well, a counterpoise.
Manufacturers state a minimum length feedline simply to have the
feedline losses help swamp out SWR variations along the line, and of
course to marginally lower the SWR.
Dave
AB7E
On 7/14/2016 1:03 PM, Don Wilhelm wrote:
Andy,
What happens if you connect to a dummy load? Does the KX2 tune it
properly?
If so, then you know the KX2 is operating into a 50 ohm load OK.
Do you have an antenna analyzer? If so, then connect it to the
antenna feedline and look at the impedance - both real and reactive -
as well as the SWR.
That will tell you whether the antenna is troublesome.
You specifically said an EFHW - that should be a resonant antenna. If
instead you have a random length wire (not a halfwave), and what is
the matching device?
Many EFHW antennas need a counterpoise to work - that is why many
manufacturers state a *minimum* length feedline.
If the problem is *not* the antenna, contact Elecraft support.
73,
Don W3FPR
On 7/14/2016 2:40 PM, Andy Clift wrote:
Just received my KX2, but unable to get it to tune an EFHW wire. I’ve
tried a home made one and then tried a SOTABEAMS MultiBander that
I’ve used successfully with an FT-857. I’ve checked the continuity in
the wire and also the continuity in the KX2 between the BNC connector
and where the wire connects inside the KX2 (as I removed this to fit
the end panels). Battery is at over 11v. Any ideas please?
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to donw...@embarqmail.com
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to xda...@cis-broadband.com
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
