From gm0udlandrew at gmail.com Mon Sep 26 16:38:08 2011 From: gm0udlandrew at gmail.com (Andrew Cowan) Date: Mon, 26 Sep 2011 21:38:08 +0100 Subject: [Hi-zreceivingarraydiscussions] Filter needed for sure In-Reply-To: References: Message-ID: <4E80E2B0.2060004@gmail.com> Hello All, After installing my Hi-Z 3 and finally getting round to trying it I am getting hammered with strong am signals from 1107, 1052, 810 khz signals mixed on 160 and 80mtrs. So going to buy the high pass filter not that I need it to go as high as 60mhz up to 7.4mhz would be enough. One question would be how do you know that the ground rod at the base of the verticals is sufficient for the system, I am getting good results on 40m comparing it to my 4 square, on 160/80 not been much about as yet to try. Andrew GM0UDL From contact at hizantennas.com Tue Sep 27 11:56:56 2011 From: contact at hizantennas.com (contact) Date: Tue, 27 Sep 2011 08:56:56 -0700 Subject: [Hi-zreceivingarraydiscussions] Filter needed for sure In-Reply-To: <4E80E2B0.2060004@gmail.com> References: <4E80E2B0.2060004@gmail.com> Message-ID: <4E81F248.7070700@hizantennas.com> Hi Andrew, The HPF would be the best practical solution. What does your grounding look like? As I remember you are in rolling hills and the ground looked fairly good. If the soil is average or better and ground rod of 3 feet will work. Also keep the leads from the Hi-Z Amp to the base of the verticals and the amp to the ground rod about the same length and in the range of 8-10 inches long. Typically the base of the vertical should be as close to the ground level as possible, about 6 inches up. 73 Dick KO7N Hi-Z On 9/26/2011 1:38 PM, Andrew Cowan wrote: > Hello All, > > > After installing my Hi-Z 3 and finally getting round to trying it I am > getting hammered with strong am signals from 1107, 1052, 810 khz > signals mixed on 160 and 80mtrs. > So going to buy the high pass filter not that I need it to go as high > as 60mhz up to 7.4mhz would be enough. > One question would be how do you know that the ground rod at the base > of the verticals is sufficient for the system, I am getting good > results on 40m comparing it to my 4 square, > on 160/80 not been much about as yet to try. > > Andrew GM0UDL > > > > _______________________________________________ > Hi-zreceivingarraydiscussions mailing list > Hi-zreceivingarraydiscussions at hizantennas.com > http://mail.hizantennas.com/mailman/listinfo/hi-zreceivingarraydiscussions_hizantennas.com > > From k7tjr at msn.com Tue Sep 27 12:52:19 2011 From: k7tjr at msn.com (Lee K7TJR) Date: Tue, 27 Sep 2011 09:52:19 -0700 Subject: [Hi-zreceivingarraydiscussions] Filter needed for sure Message-ID: Whenever there are IMD problems in a Hi-Z array, one should first make sure there is adequate supply voltage at the controller. The IMD capability is directly related to the Voltage available. We can run as high as 14.5 VDC at the controller. If the level drops below 13.8 VDC The capability is compromised. Also if any foilage or insects breach the insulators on the Hi-Z elements the system can be compromised, It took quite a while for one of our customers to find the expired spider. Lee K7TJR From n1rj at roadrunner.com Tue Sep 27 13:43:43 2011 From: n1rj at roadrunner.com (Roger D Johnson) Date: Tue, 27 Sep 2011 13:43:43 -0400 Subject: [Hi-zreceivingarraydiscussions] Filter needed for sure In-Reply-To: References: Message-ID: <4E820B4F.3020009@roadrunner.com> I checked my antennas for expired spiders. They get a bit testy when you flip them over to check the date code! 73, Roger On 9/27/2011 12:52 PM, Lee K7TJR wrote: > Whenever there are IMD problems in a Hi-Z array, one should first make sure there is adequate supply voltage at the controller. The IMD capability is directly related to the Voltage available. We can run as high as 14.5 VDC at the controller. If the level drops below 13.8 VDC The capability is compromised. Also if any foilage or insects breach the insulators on the Hi-Z elements the system can be compromised, It took quite a while for one of our customers to find the expired spider. > Lee K7TJR > _______________________________________________ > Hi-zreceivingarraydiscussions mailing list > Hi-zreceivingarraydiscussions at hizantennas.com > http://mail.hizantennas.com/mailman/listinfo/hi-zreceivingarraydiscussions_hizantennas.com > -- Remember the Liberty (AGTR-5) http://www.usslibertyveterans.org/ http://www.gtr5.com/