Theory: <http://www.repeater-builder.com/antenna/thoughts-on-isolation.html>
Applications: <http://www.repeater-builder.com/antenna/separation.html> Mike WA6ILQ At 05:36 PM 08/30/10, you wrote: >Chris, > >You do not have to use a duplexer, but it makes building a repeater SO much >easier! Keep in mind that "antenna separation" usually means vertical >separation, not horizontal separation. Moreover, the same isolation >provided by 1000 feet of horizontal separation might be provided by 10 feet >of vertical separation. The amount of isolation you need is based generally >on the transmit power, frequency separation between TX and RX, and the >sensitivity of the receiver. The receiver bandwidth and antenna types also >play a factor. > >73, Eric Lemmon WB6FLY > > >-----Original Message----- >From: Repeater-Builder@yahoogroups.com >[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mackey >Sent: Monday, August 30, 2010 4:44 PM >To: Repeater-Builder@yahoogroups.com >Subject: [Repeater-Builder] Duplexers > > > >Our club was recently given a 220 repeater. We have two seperate antennas. >We do not have a duplexer. My question is do we have to have a duplexer? How >can we keep the transmitter from desensitizing the receiver? The antennas >are apart but can be moved farther. >Thanks >Chris >Kg4bek > > > >------------------------------------ > > > >Yahoo! Groups Links > > > > >No virus found in this incoming message. >Checked by AVG - www.avg.com >Version: 9.0.851 / Virus Database: 271.1.1/3103 - Release Date: >08/30/10 11:34:00
