Hi Tim, The most common cause for "desense" is connections and not actually the duplexer. Especially if there was no "desense" prior. First I would check the link from the duplexer to the hard-line (If this fits into your site configuration) put a meter right there where the hard-line comes into the building. If you get any reflected power, then your desense problem is most likely at the antenna or from the meter and up the cable. If you think there is a power reduction there, well that jumper to the hard-line is bad. If that looks good, then check all the connections on the station (before you start turning the screws). Believe me, I have had to re-tune many a duplexer that someone turned the screws on because of "desense" that was a cabling issue and not the duplexer. God luck on the adventure.. BR -Richard
________________________________ From: tahrens301 <[email protected]> To: [email protected] Sent: Tuesday, August 25, 2009 12:43:30 PM Subject: [Repeater-Builder] DB-4050WB Duplexer Hi Folks, I was checking e-bay for duplexers last night, and came across a DB-4050 that the user said was a pass/reject duplexer. It looks almost identical to one that has been giving me some desense issues, but had a marking of SP-1894. The cabling looks a bit different, but functionally equivalent. Has anybody used one of these, and is it really a pass/reject, or just a group of notch cavities? I've seen the specs on the data page here, but it only gives the specs & doesn't call it anything specifically. I don't plan on bidding on it, as I have a 6 cavity BpBr Wacom coming from a friend, but after all of the pain I've had with the DB prod box, was just curious. Thanks! Tim W5FN
