At 9/26/2008 12:18, you wrote: >Thanks for all the good suggestions. I am using hardline jumpers from >the duplexer to the triplexer and then a double shielded silver plated >jumper over to the 7/8 inch cable to the antenna. All connectors are >factory spec, silver plated...no junk and no homemade connectors. The 2m, >220, and 440 machines are super clean on the spectrum analyzer. I am >beginning to think that the "cheap" triplexer is the problem in and of >itself. It is a 600 watt model, Comet cfx-324.
I am using one of those on a 2 meter & 440 repeater & 220 remote base. No desense. It's possible you just have a bad one. If you know anyone locally who also has one you might try swapping them. I have a Larson 2/440 diplexer that generates intermittent desense - if I hammer on it the desense comes & goes. Since it's a sealed unit I can't get inside it to fix the problem, so I marked it with my "NG for duplex" tape & threw it in the RF junkbox. It's still good for mobile installations, just can't use it on any repeater. Bob NO6B
