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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Ferrites\s+31\s+vs\.\s+77\s+material\s*$/: 45 ]

Total 45 documents matching your query.

41. Re: [TowerTalk] Ferrites 31 vs. 77 material (score: 1): Author: Jeff Blaine <KeepWalking188@ac0c.com>; Date: Sat, 9 Nov 2019 13:36:12 +0900; A single turn through a given core has much less Z than the multi-turn variety. And as frequency goes down for a given ferrite (of any type), the Z is also lower. So it's not that they only work at; /archives//html/Towertalk/2019-11/msg00065.html (11,564 bytes)
42. Re: [TowerTalk] Ferrites 31 vs. 77 material (score: 1): Author: "Bob Shohet, KQ2M" <kq2m@kq2m.com>; Date: Fri, 8 Nov 2019 23:46:02 -0500; Thank you Jeff that was easy to understand and most helpful! 73 Bob KQ2M A single turn through a given core has much less Z than the multi-turn variety. And as frequency goes down for a given ferrite; /archives//html/Towertalk/2019-11/msg00066.html (11,882 bytes)
43. Re: [TowerTalk] Ferrites 31 vs. 77 material (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Sat, 9 Nov 2019 07:45:48 -0800; Two equations that help: L (and Z) goes as number of turns squared - so 5 turns through a core has 25 times the inductance (or impedance) as 1 turn. Z = L * 2*pi*f So something that is 1000 ohms at,; /archives//html/Towertalk/2019-11/msg00069.html (12,876 bytes)
44. Re: [TowerTalk] Ferrites 31 vs. 77 material (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sat, 9 Nov 2019 10:32:23 -0800; On 11/9/2019 7:45 AM, jimlux wrote: Big cores (high mu) with lots of turns (big N^2) is the way to go.. (Except that at high frequencies, the capacitance between the turns short circuits the impedanc; /archives//html/Towertalk/2019-11/msg00073.html (11,755 bytes)
45. Re: [TowerTalk] Ferrites 31 vs. 77 material (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Sat, 9 Nov 2019 10:53:32 -0800; On 11/9/19 10:32 AM, Jim Brown wrote: On 11/9/2019 7:45 AM, jimlux wrote: Big cores (high mu) with lots of turns (big N^2) is the way to go.. (Except that at high frequencies, the capacitance between; /archives//html/Towertalk/2019-11/msg00075.html (12,190 bytes)

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