Hello, Like he said, it depends on several things. You have to consider the Antennas, power, frequency, split and quality of receiver and transmitter. On the receiver you have to look at selectivity and on the transmitter you have to look at transmit noise. I have 80 feet between my two high band antennas running a 2 meter repeater with no desense at all and no filtering. I have seen as little as 60 feet on an old GE Progress line repeater, the first repeater I ever built. The tower was only 120 feet so more would have made the repeater fairly ineffective. It also worked well with 60 watts out. If you are using something like a GE Mastr II or equivalent you could probably go as close as 60 feet with no desense. If you find you do have desense or transmit noise problem you can always use a couple of notch filters to correct the problem with little system loss. Best thing to do is try it and see what happens and address problems later. That's the fun of Ham Radio. Paul
_____ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Monday, April 21, 2008 9:06 PM To: [email protected] Subject: Re: [Repeater-Builder] Antenna Question It depends on band, split, power, and antenna gain. On Tue, 22 Apr 2008 02:00:23 -0000 "Christopher Hodgdon" <HYPERLINK "mailto:chris.hodgdon%40kaufman-ares.org"[EMAIL PROTECTED]> wrote: > We are looking at setting up a basic (I know there is no >such thing) > repeater. What I need to know, if you do not have a >duplexer to run > your antenna through, but have two antennas, with one on >the TX and > one on the RX how far apart do they have to be to be >able to correctly > operate? > No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 269.23.2/1388 - Release Date: 4/20/2008 3:01 PM No virus found in this outgoing message. Checked by AVG. Version: 7.5.524 / Virus Database: 269.23.3/1390 - Release Date: 4/21/2008 4:23 PM
