WACOM specs their 6 cavity pass-reject cans at 2.2dB insertion loss. 2.0 dB down from 100 watts is 63 watts, so you're doing good.
Remember, 3dB is going to take your power down 50%. 73, Mike WM4B From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of W3ML Sent: Monday, September 06, 2010 10:55 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: no power out of duplexer SOLVED with more questions Thanks Joe. We did most of those and then found the problem. The T-connector center pin had broken off when we apparently hooked up some test equipment and did not notice it. I still have one question though. Is it normal to have 100 watts coming out of radio and only 70 watts coming out of duplexer? Wacom 6 can type duplexer. That seems to be quite a loss. Again I appreciate all the help. 73 John, W3ML --- In Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> , Joe <k1ike_m...@...> wrote: > > 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 > > >
