Brian, I've used the WACom 4 cavity duplexers with 100 watts and no problem...no desense.
The 7000 has a spurious spec of 85 db or better, but I don't believe much the foreign companies say. With the Yeasu 5000 they say 50 watts, but for continuous duty must lower to 15 watts. This is in their spec and is one spec I believe. 7000 might have spurs or other noise not down 85 db and this can cause desense. A duplexer with 80 db isolation and repeater tx down another 85 db is what you need. If the spurious emission is a spur or just tx noise not on the tx freq, but somewhere else close to your rx and if only say 60 db down (typical for ham rigs) then you could have a problem. This same thing happens when some take a perfectly good tx and put ham PA on it. Looks good on that watt meter. This is why I prefer good old and new commercial Motorola or GE. They do what they say. Going from 10 watts with the 2410 to I think 70 watts with the 7000 (8.5 db) this is not much of a change for a duplexers. Sounds as if you have much more than 8.5 db desense. 73, ron, n9ee/r Ron Wright [EMAIL PROTECTED] Ron is the owner of Micro Computer Concepts, a manufacture of repeaters and repeater controllers since 1988. You may see our products at http://home.earthlink.net/~mccrpt or call at 727-376-6575. Contact me at 8849 Gum Tree Ave, New Port Richey, FL 34653 USA Owner of the 146.64 repeater, the highest repeater, 1175 ft HAAT, in the Tampa Bay area, Florida. The repeater also has ECHOLINK, node 79540. Pasco County Skywarn Coordinator Skywarn meets on 146.64 each Wednesday at 8 PM. Skywarn nets are activated on 146.64 when the National Weather Service broadcast a weather alert. see our web page at http://groups.yahoo.com/group/pascoskywarn/ All are welcome. > [Original Message] > From: Brian <[EMAIL PROTECTED]> > To: <Repeater-Builder@yahoogroups.com> > Date: 7/8/2005 5:17:56 PM > Subject: [Repeater-Builder] VXR-7000 > > Our local club has been running a 10 Yausu 2410 2 meter > repeater for many years. It is run through a Wacom wp-641 4 can > duplexer. Great results from this unit and it hears excellent....We > recently aquired a new vertex vxr-7000 do to some really nice friends > locally. In hooking up the new machine we have terrible desense on > lower signals that would still be full quieting into our old machine. > We had a local shop retune the duplexer and still no luck. We have > tried it both with and without the contorller hooked up and no luck. > It hears and transmits great in base mode but falls apart in repeat. > > We are open to any ideas you all might have > > Thanks. > > Brian > KC0DWX > > > > > > > > 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/
