What happens if you use the bandpass and the duplexor on the other 2M antenna? Do you get the same results? If so then you know that it is either the coax or the antenna, but if you get the same results-then you can bet you need to look elsewhere-keep at it-and keep listening to the folks on here-we all have pulled our hair out a few times with similar problems-and at some point we figure it out and fix it-
Andy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of jmp46534 Sent: Monday, September 07, 2009 7:45 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: De-sense question Correct Andy, As they say I might have won the battle but the war is not over. I still need to come up with the why it is happening. Then the solution. My next attempt is to take the bandpass out of line and try it just through the duplexer with the antenna hooked back to both sides. Can't hurt anything. 73 John --- In Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> , "Andrew Seybold" <aseyb...@...> wrote: > > Good news John, I trust that the receive antenna is higher than the > transmit antenna? And it appears from what you said that the vertical > separation is sufficient to take care of the de-sense issue-HOWEVER, > that does not mean that your transmitter is clean, only that you have > found a cure for your problem, if there are other radios at the same > site you might be causing them interference also, fixing your own > problem is only part of the fix-fixing the underlying issue is the most > important thing-but at least you have a work around for now. > > Good Luck > > > > Andy W6AMS > > > > From: Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> > [mailto:Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of jmp46534 > Sent: Monday, September 07, 2009 6:52 PM > To: Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> > Subject: [Repeater-Builder] Re: De-sense question > > > > > > We did discover that the receive works great when the transmitter is > attached to another antenna. > > Receive strength went way up. But, of course that doesn't fix the > problem of wanting to use only one antenna. > > So for now, the receive will be on the repeater antenna and the transmit > on a separate 2 meter antenna. > > Thanks for all the advice. > > 73 > John >
