EFHW
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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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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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:[hidden email]] On Behalf Of Morgan Bailey, II Sent: Monday, February 13, 2017 10:32 AM To: Elecraft Reflector <[hidden email]> 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by NS0R
I will also testify that this antenna has worked well for us. My son above,
NS0R, has used it in favor of a beam because of a tower HOA issue with his wife. LOL. Both of us have literally worked thousands of QSO with this antenna. The Parallel tuner will handle most any HIGH impedance antenna, that being 2000-5000 ohms. Having a roller inductor in parallel with a variable cap really makes the difference. Once the dip is attained, the bandwidth is the whole band on 20, and 15 both phone and CW will be under 2:1 or better. The hard part is getting the stray capacitance in the construction out of the box. At times that has been problematic, but still workable. Vy 73, Morgan NJ8M On Mon, Feb 13, 2017 at 9:31 AM, Morgan Bailey, II <[hidden email]> wrote: > 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:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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