Anybody got any idea about using a ¼λ of light weight 300Ω twin lead feed line to a ½λ vertical wire?
This might alleviate the HI Z feedpoint and effectively make an end fed (bent) ¾ λ Zepp. So, for 20 Meters, roughly 16 feet of 300Ω connected through a 4:1 balun at the radio, and 33½ feet at the other end up in a tree or pole. The down side is that it would be a single band antenna and maybe a tad cumbersome for 40 M, requiring about 33 feet of twin-lead strung out but probably NOT laid on the ground. There IS such a thing as shielded twin-lead that might be OK on the ground, but it'd be too much extra weight for a portable set-up. 73, Charlie k3ICH -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Morgan Bailey, II Sent: Monday, February 13, 2017 10:32 AM To: Elecraft Reflector <[email protected]> Subject: [Elecraft] EFHW I can vouch for the EFHW. It works great. I built a parallel tuned circuit using a roller inductor and a 15-350pf cap. I have used this several times on 20 meters feeding a 33.5 foot vertical wire. I use about 4 10 foot radials, which is probably overkill, and run it through a good choke and it has been a great performer. I have also used this box to feed a 20 and 40 meter halfsquare. I have ran 500 watts through both the half square and the 20 meter EFHW with no arcing and an SWR < 1.5 and a reactance of 3 or 4. No problems, works great. The only issue I have had is that the EFHW tends to be a little bit noisier than a traditional vertical, but I can put this antenna up and operate in less than 10 minutes so it's worth the small amount of extra noise. 73, Morgan, NS0R ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
