Jamey, Same here. I have the same thing I have to do with my Tetra system(s) just have not done so yet, that is split the the combiner in two, or four sections, cause as it stands 100 in and 36 out is not that good but that's the price to pay.
I push about 100watts a channel into the combiner 10" cavities and get about 54watts well more like 48 have to tune them to the lowest power make to make things optimized on my 406 system _____ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Jamey Wright Sent: Thursday, February 21, 2008 11:12 AM To: [email protected] Subject: RE: [Repeater-Builder] Two Repeaters, One Antenna I agree with Ken. On an 800 Mhz system I maintain, 100 watts into the combiner yields about 16 watts at the antenna. This is a 10 channel combiner with 250khz spacing and 320 ft of 1 5/8 Heliax. We have actually installed a second antenna and feedline and have plans to split the combiner but just haven't gotten around to it yet. Kinda sucks but there's always a warm spot in the room in the winter. Jamey Wright Systems Analyst/EDACS Administrator Morgan County EMCD 911 Decatur, AL 256-552-0911 > -----Original Message----- > From: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com [mailto:Repeater- > [EMAIL PROTECTED] <mailto:Builder%40yahoogroups.com> .com] On Behalf Of Ken Arck > Sent: Thursday, February 21, 2008 10:51 AM > To: Repeater-Builder@ <mailto:Repeater-Builder%40yahoogroups.com> yahoogroups.com > Subject: Re: [Repeater-Builder] Two Repeaters, One Antenna > > At 08:43 AM 2/21/2008, you wrote: > > >It can be done. I used to work with a UHF commercial system which > >combined multiple repeaters to a common antenna. The cans were built > >& tuned by TxRx; rather expensive in terms of money and insertion loss. > > > <-----One comment for what it's worth. Transmitter combiners are > generally quite lossy. And that loss can increase to prohibitive > amounts the closer in frequency adjacent ports are. > > In other words, there is a point of diminishing returns IMHO > > Ken > ---------------------------------------------------------- > ---- > President and CTO - Arcom Communications > Makers of repeater controllers and accessories. > http://www.arcomcon <http://www.arcomcontrollers.com/> trollers.com/ > Authorized Dealers for Kenwood and Telewave and > we offer complete repeater packages! > AH6LE/R - IRLP Node 3000 > http://www.irlp. <http://www.irlp.net> net > "We don't just make 'em. We use 'em!" > > > > > > > Yahoo! Groups Links > > >
