What he is saying indirectly is that your older repeater was meant for such service ... the VXR7000 is pretty much a barn door (wide open, no tunig to go anywheres you want). At the very least, you should consider a better 4 cavity duplexer like a sinclair, I have one at 93 dB rejection each side, a "six pack" like the TX/RX at over 100 dB of rejection each side (usually). The Wacom units (of which I have the same one as you) is good to about 83-86 dB or rejection per side. This is great for something under 50 watts into a really good antenna, but not much else. I also tend to put on preselectors, or just use a quality old Motorola commercial radio for receive (Mitrek, Micor, etc. that have preselection built in, and must be tuned to where you want them to operate). These are just my opinions ... nothing more.
Also, if your antenna is a hustler G6-144, G7-144, etc .... get rid of it, even a diamond works better, a db224 is best!. I have a Diamond X700HNA that I silver soldered all the joints in several years ago, and it plays great and duplex noise free (minus some rust on the old tower its on), besides, that all that I would want to put on that old tower as its due to be replaced and my new DB 224 is waiting for the new tower :) James Ralph Mowery wrote: >--- Brian <[EMAIL PROTECTED]> wrote: > > > >> 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 >> >> > >Most likely it is the 4 cavity duplexer. Many times >they do not seem to be good enough to work with some >of the repeaters. The 4 cavity units are just barely >good enough to work with some repeaters if everything >is tuned up just right. YOu need to add some >aditional selecitivity such as another cavity to each >side. > > >__________________________________________________ >Do You Yahoo!? >Tired of spam? Yahoo! Mail has the best spam protection around >http://mail.yahoo.com > > > > > >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/
