Since the purpose of a duplexer is to combine TX and RX in one antenna, the simple answer is "no."
However, you might need to use cavities separately to prevent desense. Assuming a 50 watt transmitter, a 0.35 uV receiver, and a 5 MHz separation, two antennas separated vertically by 35 feet might work without too much desense. This only works well if 100% shielded feedlines and well-shielded radios are used. Otherwise, some form of bandpass filtering and double-shielded jumper cables are necessary. 73, Eric Lemmon WB6FLY Dakota Summerhawk wrote: > > I have a UHF R100 and need to know if I need a duplexer if I am going to > be using two antennas. Can someone help? > Thanks > Dakota > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.766 / Virus Database: 513 - Release Date: 9/17/2004 > > > > Yahoo! Groups Links > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
