This one would work: http://www.sinclairtechnologies.com/catalog/product.aspx?id=72
You'll pretty much need one with a total of six sections to get enough isolation. Exception - TX/RX systems makes one with four sections that works great. Chuck WB2EDV ----- Original Message ----- From: "agrimm0034" <[email protected]> To: <[email protected]> Sent: Saturday, June 27, 2009 11:57 PM Subject: [Repeater-Builder] Re: Where to install my repeater antennas >I don't expect much coverage. I'm located in the Ohio-WV river valley and >it is relatively hard to get good coverage out of UHF. The repeater sits >almost dead center in the zone I need to coverage and roughly I'd say >around 4-5 square miles at the most. Also on a duplexer could you recommend >what kind to use. Preferably I've played with alot of Celwave equipment and >I've found it to be very good quality. Also I currently have LMR 400 cable >I could use but it is to my knowledge that it is not good for duplex use. >I've used the LMR 400 for a base station and it has worked great. > > > --- In [email protected], Butch Kanvick <hot...@...> wrote: >> >> >> Receive antenna should be the highest, but 40 feet is probably not enough >> isolation. >> >> How far do you need coverage for the repeater? >> >> It would be cheaper to use a duplexer and then you can have the best of >> both worlds. >> >> Good receiver and good transmitter range. >> >> >> >> Butch, KE7FEL/r >> >> >> >> To: [email protected] >> From: agrimm0...@... >> Date: Sat, 27 Jun 2009 21:01:58 +0000 >> Subject: [Repeater-Builder] Where to install my repeater antennas >> >> >> >> >> >> >> >> This isn't the most difficult question to answer, and I figure it can be >> answered relatively easily. I currently over the past few weeks >> constructed a GMRS repeater for my neighbor hood to use. It is >> constructed of 2 maxtrac radios one set at just 30 watts tx. I plan to >> use 2 antenna's so no duplexer is needed with some good Heliax cable >> running at least to the TX antenna. I have 40 ft of tower that I plan to >> mount the antennas on. One antenna is a Celwave (RFS) 6db gain antenna. >> And the other is just a plain 1/4 wave NMO style mount antenna. Which is >> the best way to install these antennas on my repeater? Celwave on the >> transmit end and at the top, or 1/4 wave on the Transmit and celwave on >> the receive? Also which antenna should be mounted on top of the tower? >> > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > >
