>From a link earlier in the thread, Mouser sells the Fair-Rite #31 material snapons and has them in stock:
623-0431164181 0431164181 B 100 156 260 - - - - - - 1.220 0.512 1.550 0.600 3.64 3.60 2.87 623-0431164281 0431164281 B 113 188 310 - - - - - - 0.788 0.260 1.550 0.385 2.13 1.81 1.48 623-0431164951 0431164951 B 100 169 280 - - - - - - 0.680 0.200 1.420 0.331 1.64 1.37 1.33 623-0431167281 0431167281 B 81 144 240 - - - - - - 0.933 0.400 1.550 0.460 2.64 2.33 1.80 623-0431173951 0431173951 B 60 100 180 - - - - - - 0.504 0.200 0.984 0.220 1.27 1.19 .909 623-0431176451 0431176451 B 130 225 380 - - - - - - 1.520 0.722 1.870 0.754 6.99 6.30 6.17 623-0431177081 0431177081 B 145 235 375 - - - - - - 2.220 1.000 1.690 1.080 16.41 12.62 11.47 The second figure in the right side numbers is the diameter of the hole when the snapon is closed. Have a look at K9YC's excellent web page on the characteristics for the ferrite type. #31 is what you want to use for suppression purposes 160-30 meters. http://www.mouser.com/catalog/catalogUSD/642/952.pdf I have ordered some 623-0431176451 because I want to put 5 or 6 turns of cat5 through them to mitigate some problems with AT&T Uverse, whose VDSL uses 1-12 MHz baseband. These should put over 1000 ohms of resistive suppression at 160m. Suppression is hard to come by on 160 and #31 is superior to the rest. The Fair-rite catalog contains measured suppression resistance at 1 and 5 MHz. These numbers are not in the Mouser catalog. On Thu, Jan 20, 2011 at 12:17 PM, Russ <eru...@att.net> wrote: > The ad says "44 & 43 materiel". Going by the P/N it looks like #43 > ferrite. > > Russ, > N3CO > > ----- Original Message ----- > From: "Jim Sheldon" <w...@cox.net> > To: "ab2tc" <ab...@arrl.net>; <elecraft@mailman.qth.net> > Sent: Wednesday, January 19, 2011 11:21 AM > Subject: Re: [Elecraft] OT: Big Ferrite Split Beads @ B.G. Micro > > > > They didn't list the material type in the ad, so no, I don't. I suspect > > they are surplus from a computer power supply manufacturer as they are > > about the same size as those used around the output leads of many of the > > switching supplies used in computers. > > > > I've had several queries on this so I'm posting here - I have no idea > what > > ferrite material is used in these cores and by the time the ones I > ordered > > get here and I test them with my antenna analyzer and a 5 turn loop, > > they'll probably be sold out. > > > > Jim - W0EB > > > >> > >> Any idea what the ferrite material is? > >> > >> AB2TC - Knut > >> > >> > >> Jim Sheldon-2 wrote: > >> > >>> Anyone needing those big ferrite, snap together, split beads for > >>> reducing > >>> RFI on cables, B.G. Micro has them in stock at a pretty good > >>> price. > >>> $1.43 each plus shipping. > >>> > >>> Jim - W0EB > >>> <snip> > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
