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On 10/14/2012 8:16 PM, tom wrote:
On 10/14/2012 7:48 PM, gipy wrote: On Sunday, October 14, 2012 7:55:14 PM UTC-4, tom wrote: On 10/14/2012 6:02 PM, gipy wrote: Wow, a newsgroup cop and an English teacher! BTW it's I'm and not I'M, but I won't tell you to learn the language you write. I very much respect and appreciate the "first person's" opinion and my apologies to him for not expressing that before but it is just that, an opinion, just like mine. I did not think a difference of opinion could be called an argument. My disagreement "not argument" really had little to do with my question about burying the feed-line, not which antenna works best. I am pretty sure by now this thread has gone south thanks to your watchful eye on correctness, sensitivity and diplomacy on this group but anyway, I would still like to hear from anyone with some advice on burying a feed-line. No. not a newsgroup cop, just wondering why the first response to you was disputed. And I held the cap key down too long. It happens. He's pretty much on the nose though in his comments. If you can make a G5RV or random work, it's mostly luck. Yes, with end fed proper grounding helps a lot, but it's still a crap shoot. tom K0TAR Hi tom, I have been a ham since 1955. I have experience trying different types of antennas. At one point (10 years) I designed antenna installations for Raytheon Co. Those who have not compared their random wire or G5RV to a good antenna figure it is working just fine. I can say that I know that if you want a dipole to work on multiple bands, it needs to be a full 1/2 wavelength on the band you want it to work on. Feeding it with open wire and a tuner will allow some decent performance on bands that are higher in frequency. I am guessing Tom that you already know this. My favourite antenna for living in the city on a lot surrounded by homes and industry is the horizontal loop fed with open wire. This does a great job of nulling horizontal noise from the town. Many hams just look at the 102 foot spec for a G5RV and works all bands and say great. If they can talk to anyone they figure it must be perfect. It is not actually a bad antenna on 20 meters. However, the performance on 75 is abysmal. I work 75 most of the time and when I hear a new guy come on in our area with a weak signal we all figure the guy is running a G5RV. This is usually the case. We always nudge him in the direction of putting up a decent antenna. The only time a random wire makes any sense is aboard ship or boats. If you can make a solid connection to the sea water you have a decent antenna. BTW a decent connection on a non steel or aluminum vessel is 30 square feet of copper plate on the outside of the hull. It is hardly worth my time to talk with anyone who already figures he knows all about antennas because he has used a G5RV and it works fine. We need to reserve our comments about what really works for those who are actually interested in improving their station operation and have not taken the attitude that they are already experts. :-) There is a guy here my age who has experimented with antennas much more than have I. He nudged me into changing my 450 plastic dialectrict balanced line to my loop to an open wire. I did not expect much difference. I was shocked at the improvement. He is our resident expert in the "North Woods". This is the Michigan upper peninsula, Northern Wisconsin, and Minnesota. He is not an expert on antenna theory or math, but damn sure knows what works best. I wish I had changed my feed line three years ago when he told me to do so. Michael |
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