Passive Intermodulation. Things like rusty hardware or disimilar metals can cause it in the presence of RF.
________________________________ From: rffun <radio...@her.forthnet.gr> To: Repeater-Builder@yahoogroups.com Sent: Sun, March 7, 2010 2:33:33 PM Subject: [Repeater-Builder] Re: LMR Cable <LMR and similar cables are not rated for low PIM> What exactly do you mean by PIM ? rffun --- In Repeater-Builder@yahoogroups.com, Larry Horlick <llhorl...@...> wrote: > > Indeed. I'll read the archives. Thanks. > > 73 > > On Sun, Feb 28, 2010 at 8:59 PM, Chuck Kelsey <wb2...@...> wrote: > > > > > > > The subject comes up on this list about every other week. I can only assume > > you are new. > > > > LMR and similar cables are not rated for low PIM, a fact verified by the > > manufacturer. > > > > Chuck > > WB2EDV > > > > > > > > ----- Original Message ----- > > *From:* Larry Horlick <llhorl...@...> > > *To:* Repeater-Builder@yahoogroups.com > > *Sent:* Sunday, February 28, 2010 8:49 PM > > *Subject:* Re: [Repeater-Builder] Micor Stock Power Supplies > > > > I've never heard of it. As an installer, I'm always under pressure to use > > less expensive feedlines than the venerable Heliax, and I had often > > considered LMR, but never actually succumbed to the temptation. This is > > interesting information. Is this a well documented phenomenon? > > > > Anyone else like to chime in on this... > > > > Larry > > > > > > > > > > > ------------------------------------ Yahoo! Groups Links http://docs.yahoo.com/info/terms/