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

Jim Brown jim at audiosystemsgroup.com
Fri Apr 14 12:53:09 EDT 2017

Yesterday, I got a quote on this part from Dexter, a vendor that has 
been competitive for past orders. They don't have stock, minimum order 
is a full box, which is 25 pieces, $15.18 each. 50 pieces is $14.27 
(-6%). 100 pieces is $13.57. Delivery was quoted as 14 weeks.

73, Jim K9YC

On Sun,3/26/2017 4:22 PM, Jim Brown 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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