Mouser carries a selection from Fair-Rite. They don't make it easy to find a specific part number, however.
http://www.mouser.com/Fair-Rite/Passive-Components/EMI-RFI-Components/EMI-RFI-Suppressors-Ferrites/Ferrite-Toroids-Ferrite-Rings/_/N-bw7t9?P=1z13m3cZ1yxh9di Joe Gray W5JG On Thu, Nov 27, 2014 at 11:34 AM, Tim Shoppa <tsho...@gmail.com> wrote: > Again I refer you to Clifton Labs website and cross-references there to the > Fair-Rite part numbers/mixes. Although the marketing largely emphasizes EMI > suppression, all the mainline distributors now offer several mixes and core > styles that are perfect for RF transformers. > > Powdered iron, yeah, those are not so easily found at mainline > distributors, I end up getting them from kitsandparts.com or Amidon. > > And to Jim's point... "build your own" MMIC from discrete RF transistors > (often different generations of CATV-oriented transistors - you get the > advantage that you get tune bias currents etc. for individual need) is > quite easy using parts stocked at Mouser etc. They also have these > impressive super-beefy broadband CATV distribution/isolation amplifiers. > > Tim N3QE > > On Thu, Nov 27, 2014 at 12:49 PM, Bob Camp <kb...@n1k.org> wrote: > >> Hi >> >> At least last time I looked, the "easy to find" distributors had great >> selections of parts used for switching power supplies and EMI suppression. >> When you started to dig for the specialized parts for RF transformers and >> tuned filters, the stock was pretty thin to nonexistent. If you move from >> ferrite to powdered iron, the search process alway has been more >> difficult... >> >> Bob >> >> > On Nov 27, 2014, at 11:09 AM, Tim Shoppa <tsho...@gmail.com> wrote: >> > >> > On Thu, Nov 27, 2014 at 10:28 AM, Bob Camp <kb...@n1k.org> wrote: >> > >> >> The main complaint is the difficulty of getting the correct cores. I >> seem >> >> to have a few dozen bags of cores. >> > >> > >> > The mainline distributors (Allied, Newark, Mouser, etc.) have excellent >> > selection of Fair-Rite and other cores. Admittedly to a neophyte the >> > equivalence of Fair-Rite or Laird part numbers to an Amidon-style number >> > may not be evident. >> > >> > Clifton labs has excellent webpages of examples and is also a good way to >> > find the cores sizes and materials commonly stocked at the mainline >> > distributors using the manufacturer's part number (often with cross-ref >> to >> > Amidon style number as a strong hint!) >> > >> > Recently some here expressed concern that the mini-circuits part may >> > saturate with medium DC currents. Of course if you are doing a SMT >> > production run you don't want to use bigger cores than necessary and most >> > of the mini-circuits parts tend to be physically very tiny to meet this >> > market. But if you wind your own on bigger cores this is a non-issue. >> > >> > Tim N3QE >> > _______________________________________________ >> > time-nuts mailing list -- time-nuts@febo.com >> > To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> > and follow the instructions there. >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.