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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[RFI\]\s+New\s+Larger\s+Fair\-Rite\s+\#31\s+Toroid\s*$/: 14 ]

Total 14 documents matching your query.

1. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Dave Cole <dave@nk7z.net>
Date: Sun, 26 Mar 2017 17:17:38 -0700
Jim, What would you estimate the optimal number of turns to be for this ferrite? 73s and thanks, Dave NK7Z http://www.nk7z.net http://www.fair-rite.com/product/round-cable-emi-suppression-cores-26318
/archives//html/RFI/2017-03/msg00086.html (8,778 bytes)

2. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Sun, 26 Mar 2017 17:23:49 -0700
Optimum depends on the frequency and the diameter of the coax. Like I said in the post below, I would expect this new core to be roughly equivalent to two of the 2.4-in diameter cores. 73, Jim K9YC 7
/archives//html/RFI/2017-03/msg00087.html (9,891 bytes)

3. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Larry Benko <xxw0qe@comcast.net>
Date: Sun, 26 Mar 2017 18:28:08 -0600
Dave, You might be surprised how accurate the following formula is: Toroid effectiveness is proportional to permeability*log(OD/ID)*length This is not an absolute number and it works for both donut a
/archives//html/RFI/2017-03/msg00088.html (9,993 bytes)

4. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Michael Germino <ad6aa@sbcglobal.net>
Date: Mon, 27 Mar 2017 01:12:32 +0000 (UTC)
I used the larger Toroids when I set up my pickup for HF, it was about 3 or so years ago.  I used them to wrap my large power cable coming from the battery.   Did I need it.  ???  I belt and suspende
/archives//html/RFI/2017-03/msg00089.html (8,331 bytes)

5. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 27 Mar 2017 06:07:47 -0400
I would think there will be enough room for a common mode choke To be part of the feedline of RG-8 size coax. even LMR600 for 75 and possibly 160. I'm going to order enough to do the 75 m slopers and
/archives//html/RFI/2017-03/msg00090.html (11,385 bytes)

6. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: MICHAEL ST ANGELO <mstangelo@comcast.net>
Date: Mon, 27 Mar 2017 11:28:21 -0400 (EDT)
Arrow Electronics lists them for $17.69, Mouser for 18.09. These are single lot quantities. Mike N2MS _______________________________________________ RFI mailing list RFI@contesting.com http://lists.
/archives//html/RFI/2017-03/msg00091.html (9,569 bytes)

7. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Wes Stewart via RFI <rfi@contesting.com>
Date: Mon, 27 Mar 2017 20:54:31 +0000 (UTC)
Of course it is.  It forces common mode current toward zero, leaving balanced differential currents in the two conductors.  What more should it do, make coffee too? Balun is short for Balanced to unb
/archives//html/RFI/2017-03/msg00092.html (6,994 bytes)

8. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: JW via RFI <rfi@contesting.com>
Date: Mon, 27 Mar 2017 21:58:59 +0000 (UTC)
Can I just "push this over" the absurd edge (b/c I don't think we're in Kansas working at the Bendix-King plant anymore)? I don't want a 'voltage' or 'current' balum, I want an RF POWER balum. (missp
/archives//html/RFI/2017-03/msg00093.html (7,954 bytes)

9. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Fri, 14 Apr 2017 09:53:09 -0700
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 i
/archives//html/RFI/2017-04/msg00004.html (8,522 bytes)

10. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Dave Cole <dave@nk7z.net>
Date: Fri, 14 Apr 2017 10:26:19 -0700
Jim, A question for you... Looking at the "Impedance vs. Frequency vs. Turn count" graph at: http://www.fair-rite.com/product/round-cable-emi-suppression-cores-2631814002/ It looks like these new cor
/archives//html/RFI/2017-04/msg00005.html (7,859 bytes)

11. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Fri, 14 Apr 2017 11:33:13 -0700
A question for you... Looking at the "Impedance vs. Frequency vs. Turn count" graph at: http://www.fair-rite.com/product/round-cable-emi-suppression-cores-2631814002/ It looks like these new cores on
/archives//html/RFI/2017-04/msg00006.html (9,890 bytes)

12. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Chuck Gooden <Chuck.Gooden@comcast.net>
Date: Fri, 14 Apr 2017 14:27:01 -0500
Jim, Could you clarify if you mean 5 turns through each core as in separate chokes in series. Or 5 turns through both cores as in 1 choke with two cores? Or is there a difference? It doesn't seem lik
/archives//html/RFI/2017-04/msg00007.html (7,929 bytes)

13. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Fri, 14 Apr 2017 13:39:29 -0700
I mean two chokes, each with five turns, wound on the same coax. There is a HUGE difference. Study k9yc.com/RFI-Ham.pdf, which includes a tutorial on how ferrite chokes work. The chokes in series kee
/archives//html/RFI/2017-04/msg00008.html (9,364 bytes)

14. Re: [RFI] New Larger Fair-Rite #31 Toroid (score: 1)
Author: Dave Cole <dave@nk7z.net>
Date: Fri, 14 Apr 2017 17:01:09 -0700
Thank you Jim! 73s and thanks, Dave NK7Z http://www.nk7z.net A question for you... Looking at the "Impedance vs. Frequency vs. Turn count" graph at: http://www.fair-rite.com/product/round-cable-emi-s
/archives//html/RFI/2017-04/msg00009.html (10,312 bytes)

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