Re: [Elecraft] OT: "Flat" ferrite clamp-ons for window line
Guy, Look at Fair-Rite 2643167851 This MIGHT allow several turns of some smaller window line, maybe enough to be useful at HF. Remember that you need a complete magnetic circuit, so this makes it unlikely that ferrite parts designed for ribbon cable will fit your need. I assume you're attempting a common mode choke. Take a look at the latest version of my RFI tutorial, which shows some very nice medium power HF common mode chokes having a Z of about 100 ohms wound on #31 toroids with #14 THHN. You could raise the impedance by spreading the bifilar pair a bit. Unlikely you'll achieve a perfect match, but we both know that's probably not a deal killer for a section of line that's less than 1/30 wavelength at the operating frequency. :) http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim K9YC __ 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
Re: [Elecraft] OT: "Flat" ferrite clamp-ons for window line
Thank you Jack and Greg. Nothing so frustrating as knowing it's out there and can't even get Google to find it. Magic word aphasia most likely due to brain damage from 500 watts on a 40m dipole 3 feet overhead in my college days (or any other of host of excuses). Thank you thank you thank you thank you. 73, Guy. On Thu, Jan 6, 2011 at 2:19 PM, Jack Smith wrote: > Search Mouser's on-line catalog using the words: ribbon ferrite > > www.mouser.com > > These are made to clamp over computer ribbon cable and are available in a > variety of physical sizes and permeability. You should find both split cores > with plastic clamps as well as standard cores. > > Jack K8ZOA > > > On 1/6/2011 2:15 PM, Guy Olinger K2AV wrote: > > Somewhere, back a while I saw someone mention that someone was selling > ferrite clamp-ons that were made to go over the typical "450" ohm > window line. I have an immediate need for that but can't come up with > the magic word to make it pop up in Google. > > Any clues, including the magic word, greatly appreciated. > > 73, Guy. > __ > 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
Re: [Elecraft] OT: "Flat" ferrite clamp-ons for window line
Search Mouser's on-line catalog using the words: ribbon ferrite www.mouser.com These are made to clamp over computer ribbon cable and are available in a variety of physical sizes and permeability. You should find both split cores with plastic clamps as well as standard cores. Jack K8ZOA On 1/6/2011 2:15 PM, Guy Olinger K2AV wrote: > Somewhere, back a while I saw someone mention that someone was selling > ferrite clamp-ons that were made to go over the typical "450" ohm > window line. I have an immediate need for that but can't come up with > the magic word to make it pop up in Google. > > Any clues, including the magic word, greatly appreciated. > > 73, Guy. > __ > 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] OT: "Flat" ferrite clamp-ons for window line
Somewhere, back a while I saw someone mention that someone was selling ferrite clamp-ons that were made to go over the typical "450" ohm window line. I have an immediate need for that but can't come up with the magic word to make it pop up in Google. Any clues, including the magic word, greatly appreciated. 73, Guy. __ 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
