Lee: I think most repeater operators would be appalled to see what gets through their BP/BR duplexers. While they're called that, most are not good bandpass filters. Also, at many sites the repeater receiver is capable of dealing with the signals it sees, as long as the owner hasn't put some 22 dB preamp on it. As always, what you use depends on the application, and the notion of quality is relative.
Chuck - N8DNX [ED - A Wacom 678 UHF duplexer does a good job of passing VHF paging signals right on thru - hence a band pass cavity - 2 loop job - before any preamp, and a MONO band antenna] -----Original Message----- From: ve7fet <[EMAIL PROTECTED]> Sent: Friday, June 27, 2008 5:56 PM To: dstar_digital@yahoogroups.com Subject: [dstar_digital] Re: Inside Chassis coax - lossy Hah, lets not go down that rat hole again. ;) I wasn't referring to the power handling capability of the mobile duplexers, as I was more trying to make the point of how broad their pass is. With an easily overloaded RX (think a mobile masquerading as a repeater receiver... ala D-STAR and others), in a typical high RF repeater site, a mobile duplexer is inviting trouble. I have a bunch of old Harris radios, with said mobile duplexers built in, and they work great in our high-speed packet backbone, with links using between 5 and 30W. BUT, they also have a manually tuned pre-selector on the front end to keep all the "junk" out. Cheers! Lee
