I had the same problem...scored a piece of 1/2 heliax and problem went away. I tried new LMR connectors, etc. Swapped with Belden 9913 and worked well...so just got the heliax and much better signal.
Chris --- In [email protected], "Rogers, Ron" <[EMAIL PROTECTED]> wrote: > Start off by getting rid of the LMR-400 feedline !! > > Do not use braid over tin foil feedline for repeater duplex operation. > Internal chaffing of braid and tin foil with any feedline movement during > transmit will "kill" your repeater. > > To confirm the problem IS with the feedline swap it out with a 50 foot piece > of LDF-50 or even a piece of good old Beldon 8214 coax. > > > Ron Rogers > -WB8ERB- > > -----Original Message----- > From: sledman11 [mailto:[EMAIL PROTECTED] > Sent: Tuesday, November 11, 2003 1:57 PM > To: [email protected] > Subject: [Repeater-Builder] Static / desense problems > > > Looking for idea's on tracking down an intermittent static and > desense problem I am have with a 2 meter repeater. The set up is as > follows - ge mastr II base, LMR 400 coax (about 50 ft) into a diamond > F23A antenna mounted on a chimney with 22' of black pipe mast. The > location is the local firehouse which has a antenna mounted on a > tower about 70' feet away from the repeater antenna. We also have a > 220 Mhz, 4 element beam mounted on the back pipe mast about 12' under > the repeater antenna. This is for echolink. Have turned off the 220 > Mhz link with no affect on the problem. Have not been able to > determine a pattern to the problem (ie cold, wet windy etc). When it > happens it can sometimes completely wipe out a signal that was full > quieting. Have checked the antenna and all is tight, dry and no > problems that I can see visually. Including the coil and capacitor > at the bottom of the antenna. Thought about running jumpers between > the antenna mount, mast, 2 meter antenna and the 220 Mhz antenna so > all are at ground potential. Do feel it is something outside that is > causing the problem and not the radio or duplexers. Can create > static on a weak signal coming into the repeater by banging on the > mast. All idea's welcome. > > Thanks, > > Don > WW2N > > > > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
