While you are out at the antenna, stick the wattmeter in line and check the foward/reflected there with the antenna and the dummy load. My guess is that you will quickly find your problem.
I would check the connection to the DB-224 coax as well as the connections to each element. Also check the center connection. 30 foward and 3 reflected is a whole lot higher than I would accept; at least 10% of your RF out is being reflected. Milt N3LTQ ----- Original Message ----- From: "tahrens301" <tahr...@swtexas.net> To: <Repeater-Builder@yahoogroups.com> Sent: Tuesday, September 01, 2009 4:02 PM Subject: [Repeater-Builder] Re: Antenna SWR = Desense? > Hi Joe, > > The repeater/duplexer is in my workshop (a large metal building). > > The heliax goes out the window to a smaller portable building > about 100' away (horizontally spaced). The antenna is on > that building about 10' off the ground. > > > > Don - took the dummyload & analyzer to the end of the hard line, > fed it into the iso-tee there. No desense is noted. Something's > not right when the antenna gets hooked up. Maybe I should put > up the ringo for a test..... at least it's probably a bit better > of a match. > > > > --- In Repeater-Builder@yahoogroups.com, Joe <k1ike_m...@...> wrote: >> >> You state "DB-224 100' horizontally & 10' vertically separated". I >> don't understand what you mean by that. >> >> Joe >> >> >> tahrens301 wrote: >> > However, putting the system on the antenna (a 150-160 mhz >> > DB-224 100' horizontally & 10' vertically separated) >> > through a metal building fed with 7/8 heliax, there >> > seems to be no end to the desense! >> > >> > >> > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.392 / Virus Database: 270.13.73/2338 - Release Date: 08/31/09 17:52:00
