If it works into a dummy load without desense you either have a feedline/antenna problem or external noise and most likely not the duplexer - be sure and use an isolated TEE and sig gen with a dummy load to test. Steve NU5D
jminn699 wrote: > -I am having the same problem also with a wacom duplexer. On a dummy > load the tunning checks great with no desense, but with the antenna > attached the repeater will hang on transmitting noise as long as the > ttansmitter is on. > I can`t take the system off the air, and I don`t have another > duplexer. My short term solution has been to set the repeater hang > time to zero. Another would be to make the tx pl different from the > rx; but I am hoping to avoid reprogramming all the radios on the > system. > > My system is located in a lousy enviorment, a elevator equipment > room-there is a layer of carbon dust on everything. I suspect that > this dust may have found its way inside the cans, but I can`t take it > off the air to open up the cans. > > I hope someone has a solution to this problem. > > Joe > > > > > > -- In Repeater-Builder@yahoogroups.com, "Dan Cation" <[EMAIL PROTECTED]> > wrote: > >> Hi everyone - new to the group looking for help on a strange >> > problem. > >> I've been involved with two repeaters in Southeast Kansas >> > (Humboldt - > >> 147.18 and 442.900) for over 30 years and work in Electronics, >> although not in radio. A couple months ago we lost both repeaters >> when we had a flood in this area - I took the Wacom duplexer apart >> > and > >> cleaned any obvious corrosion or such and assumed it would be fine - >> it tuned up without any trouble and there was almost no corrosion. >> > I > >> replaced as many of the T connectors as I could and carefully >> > cleaned > >> any that remained and made new cables of the correct length. I have >> built a new repeater but am now having a problem with intermittent >> buzzing sometimes when the transmitter is up - it will hold the >> receiver open and cover any signals that aren't pretty strong. >> > Comes > >> on whenever the transmitter comes up but not always - sometimes it >> > is > >> fine. I have tried 3 different transmitters - a Midland 3400, a >> Midland 340A and even a couple Icom rigs - makes no difference. >> > Same > >> for receivers - makes no difference. Never shows up unless the >> duplexer is hooked to an antenna - works fine on a dummy load. >> > Tried > >> two different antennas as well. The noise sounds like bad line >> > noise, > >> but I can't hear it except on the repeater. The repeater is at my >> house right now, but I intend to haul it back to the site to see if >> > it > >> shows up there as well when I can get time to do it. Anyone else >> > ever > >> ran into this kind of thing? >> >> > > > > > > > > Yahoo! Groups Links > > > > > -- Ham Radio Spoken Here !!! NU5D EM11 http://www.qrz.com/callsign/NU5D Nickel Under 5 Dollars
