So in a "duplex" application, if the supply of the better cable is limited, it's better to use it on the rx side?
On Sun, Mar 7, 2010 at 6:42 PM, Dan Saputo <[email protected]> wrote: > > > "Real" as it refers to the original military-spec'd construction of the > cable. "Type" meaning similar to original spec but likely not exact. > common differences in "Type" cable might be tinned vs. silver plated > conductors, dialectric material etc. > > Spec RG-142 has a silver-plated steel center conductor. repeated flexing > can cause the thin plating to fracture off creating duplex noise. i've > personally not had this problem but it is a documented issue. > > Dan > k8plw > > --- On *Sun, 3/7/10, Larry Horlick <[email protected]>* wrote: > > > From: Larry Horlick <[email protected]> > Subject: Re: [Repeater-Builder] Re: LMR Cable > To: [email protected] > Date: Sunday, March 7, 2010, 6:24 PM > > > What is the difference between real and un-real RG214? And what is the > problem with RG-142? > > lh > > On Sun, Mar 7, 2010 at 6:24 PM, NORM KNAPP <nkn...@twowayradio. > net<http://us.mc560.mail.yahoo.com/mc/[email protected]> > > wrote: > >> >> Those are usually the preferred types of cables. You should have no >> problems with either of those. I prefer REAL RG214/U., but RG400/U, RG393 or >> RG223/U will work. Avoid RG-142 and RG-9/U. Superflex is also a good choice. >> Don't even think about any LMR type or >> similar. >> N5NPO Norm >> >> ----- Original Message ----- >> From: Repeater-Builder@ yahoogroups. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.com><Repeater-Builder@ >> yahoogroups. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.com>> >> >> To: Repeater-Builder@ yahoogroups. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.com><Repeater-Builder@ >> yahoogroups. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.com>> >> >> Sent: Sun Mar 07 16:54:30 2010 >> Subject: Re: [Repeater-Builder] Re: LMR Cable >> >> >> >> Any problems with RG-214 or RG223 for duplexers/multi- couplers/ >> combiners? >> >> lh >> >> >> On Sun, Mar 7, 2010 at 5:50 PM, Dan Saputo <dan17...@yahoo. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=dan173mi%40yahoo.com><mailto:dan17...@yahoo. >> com <http://us.mc560.mail.yahoo.com/mc/compose?to=dan173mi%40yahoo.com>> >> > wrote: >> >> >> >> >> well-documented and caused mainly by the use of foil shielding as in the >> lmr series. gets worse as cable ages and internal braid-foil contact >> degrades. Although not as big of a problem with lmr due to an insulating >> layer over the actual foil. beware of belden 9913 and lmr look-alikes. >> trouble when used duplex. >> >> Dan >> k8plw >> >> --- On Sun, 3/7/10, Chuck Kelsey <wb2...@roadrunner. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=wb2edv%40roadrunner.com><mailto:wb2...@roadrunner. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=wb2edv%40roadrunner.com>> >> > wrote: >> >> >> >> From: Chuck Kelsey <wb2...@roadrunner. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=wb2edv%40roadrunner.com><mailto:wb2...@roadrunner. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=wb2edv%40roadrunner.com>> >> > >> Subject: Re: [Repeater-Builder] Re: LMR Cable >> To: Repeater-Builder@ yahoogroups. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.com><mailto:Repeater-Builder@ >> yahoogroups. >> com<http://us.mc560.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.com>> >> >> Date: Sunday, March 7, 2010, 4:56 PM >> >> >> >> Passive Intermod. In other words, it tends to be a source in which >> intermod >> can be generated easily. >> >> Chuck >> WB2EDV >> >> ----- Original Message ----- >> From: "rffun" <radio...@her. forthnet. gr <http://us.mc560. mail.yahoo. >> com/mc/compose? to=radiocom% 40her.forthnet. >> gr<http://us.mc560.mail.yahoo.com/mc/compose?to=radiocom%40her.forthnet.gr>> >> > >> To: <Repeater-Builder@ yahoogroups. com <http://us.mc560. mail.yahoo. >> com/mc/compose? to=Repeater- Builder%40yahoog >> roups.com<http://us.mc560.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.com>> >> > >> Sent: Sunday, March 07, 2010 3:33 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 <http://us.mc560. mail.yahoo. >> com/mc/compose? to=Repeater- Builder%40yahoog >> roups.com<http://us.mc560.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.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 <http://us.mc560. >> mail.yahoo. com/mc/compose? to=Repeater- Builder%40yahoog >> roups.com<http://us.mc560.mail.yahoo.com/mc/compose?to=Repeater-Builder%40yahoogroups.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 >> > >> > >> > >> >> ------------ --------- --------- --------- --------- --------- - >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com >> Version: 9.0.733 / Virus Database: 271.1.1/2728 - Release Date: 03/07/10 >> 02:34:00 >> >> >> >> >> >> >> >> >> > > >
