[TowerTalk] [RFI] New Larger Fair-Rite #31 Toroid

[MICHAEL ST ANGELO]

Arrow Electronics lists them for $17.69, Mouser for 18.09.


These are single lot quantities.


Mike N2MS


> 
>     On March 26, 2017 at 7:22 PM Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
>     KY8D asked me about a new, larger #31 toroid that has recently been
>     added to the catalog. It's 4-in o.d., 3-in i.d, and 1-inch long.
> 
>     http://www.fair-rite.com/product/round-cable-emi-suppression-cores-2631814002/
> 
>     Note the impedance data for 1, 3, and 5 turns at the bottom of the page.
> 
>     Gan's email arrived today (Sunday) so I haven't had the opportunity yet
>     to investigate pricing. My guess is at least double the cost of the
>     2.4-in toroid, but because it's twice the length (1-in as opposed to
>     0.5-in for the 2.4-in toroid), a single core will likely be equivalent
>     to two of the 2.4-in cores, so fewer cores will be required to achieve
>     the same choking Z. More important, the much larger i.d. will allow more
>     turns and/or larger coax.
> 
>     73, Jim K9YC
> 
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