What make and model is the duplexer? I know of one instance that the loop inside the duplexer can come disconnected due to a bad solder joint, but can't remember what one it was. A search on this list should find it, as it was discussed recently.
The first thing would be to check all connections for tightness. Do not over-tighten the connections! Just make sure that they are snug. If your knuckles are turning white, your tightening too much. N connectors need to be snug, UHF connectors need to be a little tighter, but not cranked down tight, but not until they break. What you can do is take the connecting cables off the transmit side cans and test the first one for power out. Then connect the next can in series and see if there is output from that can. This process should isolate the bad can(s). Disconnect the receiver while doing this just to be safe. MARK all the cables as to where they came from. Do not mix them up. It may be a bad cable, so if you find a problem make sure that it is not the interconnecting cable. If all the cans and cables test OK, their may be a problem on the receive side of the duplexer. Keep it simple, don't fool with the cans unless you prove that one is bad. This process is to eliminate the obvious before you go tinkering with the duplexer. Check the tightness of connections first, cables second, and lastly the cans. The process above will help you isolate the bad can so you hopefully only have to tinker with one can. The real fix would involve some test equipment. What do you have available? Service monitor, tracking generator? Others will probably have some good suggestions, these ideas are just off the top of my head. On 9/6/2010 9:37 AM, W3ML wrote: > Hi, > > First, let me say that we are still new to the repeater business and learning > as we go. This the first time in 30 ham years that I have been involved with > a VHF repeater system. > > Our repeater was working okay at 80 watts out of GE Mastr II and 60 watts > out of Duplexer. When I turn the power up to 100 out of radio and 80 out of > duplexer it seemed to be working okay. > > But, now a few hours later there is no power coming out of duplexer at all. > Radio still shows power coming out. > > Nothing was touch on the duplexer. Any ideas? > > 73 > John, W3ML >
