[time-nuts] Minicircuits 10% discount in December

[Tim Shoppa]

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 <kb8tq at 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 <tshoppa at gmail.com> wrote:
> >
> > On Thu, Nov 27, 2014 at 10:28 AM, Bob Camp <kb8tq at 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
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