How are/were the isolation values mentioned below measured? Cable to cable? Cable to a measurement device/reference?
skipp > --- In [email protected], >Joe <[EMAIL PROTECTED]> wrote: > RG-400 is stranded center conductor. > If you have a solid center > conductor, it may be RG-142 that you have. > RG-400 and RG-142 will > give about 75 dB isolation from leakage. > Foil & braid shielded coax > will give about 90dB. Hardline (solid > copper tube) will give about > 110dB of isolation. > > > > So, hardline is the best at 110db isolation. I would use the N > connectors that you have and then use a GOOD quality adapter to take > it from N to UHF (not radio shack). Better yet would be changing the > connector on the radio to an N. > > > > RG-400 or RG-142 would be the easiest. You could probably fit a > UHF connector easily to this cable for the equipment end, and an N > connector on the other for the duplexer. > > > > I would stay away from foil & braid shielded coax. I have never > been happy with either the crimp or the compression connectors for > this style cable. It can be used, but extreme care is needed to get > a good quality connection. Then there is always the argument of > noise.......... > > > > Remember, some repeaters work perfectly well with RG-8 jumpers on > the duplexers. Commercial duplexers sometimes come with RG-8 > interconnecting cables. If you are trying to solve a desense > problem, it may not be the jumpers that are causing the problem. It > never hurts to use the best, but it may not be the fix for the > problem at hand. > > > > 73, Joe, K1ike > > 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/
