To: <towertalk@contesting.com> For further info on this topic, see "A Theoretical and Experimental Study of the Effects of Very Large Ground Screens on 20 Meter Verticals" which is available on my we
Why is it that people that can copy an s3 signal at 35 wpm and get it ALL right, miss the key point in this thread from W4RNL? Every reference to his excellent work on this subject has apparently mis
Bill, Remember that the two most common "verticals", the R-7 by Cushcraft and the DX-77 by Hy-gain are not 1/4 wave verticals. The R-7 is a halfwave vertical and the DX-77 is a hybrid windom fed 1/2
Hi Bill, not need, Just call me wooden ears. What point? It would help if someone plainly posted the "key point" alluded to above. Are you referring to something on a Web page? 73 Tom -- FAQ on WWW:
Hi Folks, I think the DX-77, HF6-V and R-7 are only half-wave fed above 20 meters (on 80-40 they are simple 1/4 wave verticals)....I could be wrong about that but someone ought to check it out for su
Hi Jon, The R7 is not a half wave vertical despite all the hype from Cushcraft. A base-fed half-wavelength vertical has a very high input impedance and requires a more sophisticated and frequency sen
Thanks Joe, Nothing like hearing the facts from the source. Whether it's 3/8 wl or 1/2 wl I still stand by my premise that it's a pretty good antenna for it's size and ease of erecting/tuning. Automa
1/2 through sqft design. Agreed also from here. I ran the R-7 as my only antenna for about a year. It was mounted only 12 feet above ground at 175 feet above sea level here in So. NH. It performed v