Mike, FWIW - I tried to move back and forth through the bookmarks that opened to the left of this document. Each try resulted in a "404 error" in my web browser.
Is this from some subscription or password access location, and because I'm not logged in myself I can't browse the document? Just curious - looks like a very valuable document to have it the library... Mark - N9WYS -----Original Message----- From: Repeater-Builder@yahoogroups.com On Behalf Of Mike Morris WA6ILQ It's called "passive intermodulation"... Read this excellent writeup by Narda Corp (a manufacturer of high quality microwave stuff): < http://www.nardamicrowave.com/east/appnotesrefregpdf/WIRE0048.pdf > Look for the section titled "CAUSES OF IMD IN FILTERS AND FERRITES" and points 1 and 6 are the most applicable. Point 3 is why Stationmasters with internal cracked elements create duplex noise and IMD. Mike WA6ILQ
