Mike, Joe and Ralph, Thank you all for the great information about the power loss. As I stated earlier, I am still earning about this repeater stuff. In the past year and half I have learned more about repeaters than I knew in the first 29 years of being a ham.
It is great! I believe one should never quit learning about this hobby. I have stored your answers away in the repeater folder for future reference and really do appreciate you taking the time to explain it all to me and maybe others that had questions as well. 73 John, W3ML --- In Repeater-Builder@yahoogroups.com, "Mike Besemer \(WM4B\)" <mwbese...@...> wrote: > > 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_mail@> 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 > > > > > >