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Re: [TowerTalk] New Larger Fair-Rite #31 Toroid

To: jim@audiosystemsgroup.com, Rfi List <rfi@contesting.com>, towertalk reflector <towertalk@contesting.com>
Subject: Re: [TowerTalk] New Larger Fair-Rite #31 Toroid
From: "chuck.gooden" <chuck.gooden@comcast.net>
Date: Sun, 26 Mar 2017 18:40:44 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
    
Mouser.com has it listed for $18.09 in single unit quanities in case any one is 
interested.  
Chuck K9LC
Sent from my Verizon Wireless 4G LTE smartphone

-------- Original message --------
From: Jim Brown <jim@audiosystemsgroup.com> 
Date: 03/26/2017  6:22 PM  (GMT-06:00) 
To: Rfi List <rfi@contesting.com>, towertalk reflector 
<towertalk@contesting.com> 
Subject: [TowerTalk] New Larger Fair-Rite #31 Toroid 

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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