The duplexer is a DB-4048. I have had this repeater for a couple of months and it has always had problems. I don't have access to a service monitor or anything like that right now but I have a friend that has one however someone is borrowing it right now.
From what I can tell the desense is pretty bad. I can key up the repeater a lot further than I can send audio through it. all of my cables are double shielded or better. Thanks, Vern On Mon, 24 Sep 2007 19:54:33 -0500 "Steve S. Bosshard (NU5D)" <[EMAIL PROTECTED]> wrote: > Decibel did make a 6 cavity notch duplexer - 4" full >sized cavities - > that would work nicely on a 110 Watt M2 station @ 600 >kHz. Isolated > TEE test into a dummy load - how bad is the receiver >desense ? If you > don't have some test equipment - signal gen, dummy load, >and a TEE > fitting with the side pin cut away (makes 60 dB lossy >coupling, there > abouts) you probably will need to find someone who does >locally that can > help. 73, Steve NU5D > > Eric Lemmon wrote: >> Vern, >> >> Did this problem exist before you had the duplexer >>tuned? Was anything at >> all done to your repeater system just before the problem >>was noticed? >> >> A band reject (notch) duplexer may be incapable of >>performing even >> satisfactorily at 2m. Please advise the model number of >>your duplexer, so >> we can understand your situation. Are all of your >>cables double-shielded? >> It might be a good idea to perform a noise-floor test >>using an "iso-tee" and >> a service monitor. >> >> Some helpful information about investigating desense >>problems can be found >> here: >> >> <www.repeater-builder.com/ge/datafile-bulletin/df-10002-02.pdf> >> >> 73, Eric Lemmon WB6FLY >> >> >>
