Tim, did you happen to try the dummy at the end of the feed line instead of antenna? Are you sure the connector from the 7/8 to the duplexer (or any connector / adapter near that connection) is good? Did you put all the covers back on during the antenna test?
You're getting closer! Don W5DK -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301 Sent: Tuesday, September 01, 2009 2:03 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Antenna SWR = Desense? Hi folks, Just a bit of an update... got the 6 cavity Telewave duplexer tweaked up - looks like it pretty much hit the specs in the data sheet. With a dummy load at the 'antenna' port, I used an "iso-tee" to inject a signal at both the receiver input, and between the antenna port & the dummy load. With a weak signal, both places showed me that there was no desense. Very weak signal would hold in the repeater. 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! The wattmeter shows 30 watts forward & 3 watts reflected at the antenna port, if my math serves, it's less than 2:1. Can the less than 1:1 match be the culprit? Thanks, Tim W5FN ------------------------------------ Yahoo! Groups Links
