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mount the metal strap that runs down the side of it. there for DC grounding the driven element now if i take a ohm meter acrossed the driven and boom it shows direct short. i modified the balin i carfully drilled drain holes in the side opasit side of the metal strap becuse it was mounted sideways and i sealed the factory made drain holes that are near the coax conectore anyhow it seems to work well i have compaird it to the coax wound balun and didnt see mutch diffrence in SWR BTW i do get good signal reports running 100 watts and i do get rain static when raining hard greg N8TDL > Very interesting. > Can the problem be solved by feeding DE with balun, bonding coax feeding > balun to boom? > Am about to erect 3CSXL and been wondering about this. > 73 > Barry Kirkwood PhD ZL1DD > Signal Hill Homestay > 66 Cory Road > Palm Beach > Waiheke Island 1240 > NEW ZEALAND > http://www.waiheke.co.nz/signal.htm/ > ----- Original Message ----- > From: ww <dj7aa-wil@t-online.de> > To: Guy Olinger <olinger@bellsouth.net>; Force12T-reflector > <Force12Talk@qth.com> > Sent: Wednesday, 30 August, 2000 2:56 AM > Subject: Re: [Force 12 Talk] Isolated elements > > > > Is the driven element also grounded ore isolated? > > > > I using this Force 12 Magnum since 5 years, and believe me, I know how > about > > i > > speak. > > The Yagi I mean (ZX 20m monoband) have grounded driven element with a > > gamma match for driving. And there are NO static when on the Force12 the > > S-meter goes constant S9. > > And, the second 20m monoband Yagi is on a seperate tower, 30m apart from > > the Force 12 and on top of this tower, so there is no shield ore anything > > like > > this. > > > > Wil DJ7AA > > > > Guy Olinger schrieb: > > > > > Who said that element-center-grounded yagis are not effected by > > > snow/rain static? Not true. > > > > > > Can think of many times when W4BVV's big 40, 20 and 15 yagis (all center > > > grounded) got rain and snow static. One time had snow static on 40 > > > meters that was 20 over S9. Couldn't hear anything except the locals for > > > over an hour. > > > > > > One thing that has been reported, for some with more than one antenna on > > > a tower, the top antenna gets noised up more than the lower one(s), as > > > if the upper one is somehow "shielding" the lower, mechanism unknown. > > > > > > - - . . . . . . - - . . . . - - . . - . . > > > > > > 73, Guy > > > k2av@contesting.com > > > Apex, NC, USA > > > > > > ----- Original Message ----- > > > From: Wil DJ7AA <dj7aa-wil@t-online.de> > > > To: Danny <ON7NQ@pandora.be>; Force12T-reflector <Force12Talk@qth.com> > > > Sent: Tuesday, August 29, 2000 6:23 AM > > > Subject: Re: [Force 12 Talk] Isolated elements > > > > > > > > > > > I have lots of trouble with these insolated elements. I using Magnum > > > > 620-340 and every time we get havy rain showers ore snow showers, > > > > the antenna have very havy static noise, wich is not on a beam with > > > > center grounded elements. Think this phaenomen is like a Corona > > > Effect. > > > > The antenna become useless on this time for receiving. > > > > I have mostly a seperat 4 ele monobander as second antenna (ZX-Yagi) > > > > and this antenna does not have this effects. > > > > > > > > Of course, a closed quadloop also dont have this effects. > > > > > > > > 73 Wil > > > > > > > > > > > > -------------------------------------------- > > > > Force12Talk mailing list provided as a service by Force 12 Antennas, > > > Inc. > > > > Force 12 Web site: http://www.qth.com/force12 > > > > > > > > Submissions: send to Force12Talk@qth.com > > > > To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com > > > > Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk > > > > For problems with the list, contact n4zr@qth.com > > > > > > > > > > > > > > > > > > > > -------------------------------------------- > > Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. > > Force 12 Web site: http://www.qth.com/force12 > > > > Submissions: send to Force12Talk@qth.com > > To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com > > Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk > > For problems with the list, contact n4zr@qth.com > > > > > > > > > > -------------------------------------------- > Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. > Force 12 Web site: http://www.qth.com/force12 > > Submissions: send to Force12Talk@qth.com > To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com > Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk > For problems with the list, contact n4zr@qth.com > > > -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Submissions: send to Force12Talk@qth.com To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk For problems with the list, contact n4zr@qth.com |
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