At 01:57 AM 5/26/2005 -0000, you wrote: Currently I have a 6 cavity TX/RX duplexer system, which has 2.2 >dB of isolation. The system is running 125 watts into the duplexer, >getting just somewhat under 90 watts out.
<----Hmmmm.. 2.2 Db of isolation can't be right, although 2.2 Db of insertion loss, while a bit excessive, is more like it. Except 120 watts in, 90 watts out is nowhere near 2.2 Db of insertion loss. How much difference would be noticed if the duplexer's were changed to use only 4 cans. The difference that I am looking at is how much father would the repeater be heard, versus how far it would hear, how much noticable difference, considering I get no decense. The repeater is in virtually an RF free location. Other than the isolation issue, what else would fall into >the matter. Thanks again, as I was asked why six cans over 4. <--------Assuming insertion loss is less (and I would expect a 4 can to be somewhere around 1.2 to 1.5 Db insertion loss), I don't think you'd notice any difference whatsoever in coverage area. You're working with bad data to start with anyway but I can't see any reason at all to consider changing it out. Not to mention a 4 cavity duplexer on a VHF, .6 meg split is marginal to start with (and I have to assume you're talking VHF) Stick with the 6 cavity.... Ken ------------------------------------------------------------------------------ President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html It was great to meet many of you at Dayton 2005! We offer complete Kenwood TKR repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net 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/
