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Groups > sci.electronics.design > #429761
| From | amdx <nojunk@knology.net> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: More inductor talk, Proximity effect, self capacitance |
| Date | 2016-09-28 22:06 -0500 |
| Organization | A noiseless patient Spider |
| Message-ID | <nsi0fi$of4$1@dont-email.me> (permalink) |
| References | <nsh2tn$8cq$1@dont-email.me> <nshgog01bpr@drn.newsguy.com> |
On 9/28/2016 5:38 PM, Winfield Hill wrote:
> amdx wrote...
>>
>> A fine gentleman did an experiment building two inductors.
>> The coils were wound with 420/46 litz. Both inductors have 40 turns.
>> One inductor is close wound (215uh 7.7pf distributed capacitance).
>> The second has a 0.625/wire diameter space between wires, (187uh and 6.9
>> pf distributed capacitance).
>> The inductor with spacing has a higher Q, except at the low end
>> where the Q's are equal.
>
> What was the SRF for each coil?
>
>
The fine gentleman, who does good work sent back the following.
"I don’t have measured SRF’s. Can’t be measured on a Q meter.
But, you can calculate SRF’s from L (true value) and Co.
For these coils:
Closewound: L = 214.8 uH; Co = 7.7 pF; SRF = 3.91 MHz
Spaced: L = 187.2 uH; Co = 6.9 pF; SRF = 4.43 MHz."
Mikek
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More inductor talk, Proximity effect, self capacitance amdx <nojunk@knology.net> - 2016-09-28 13:42 -0500
Re: More inductor talk, Proximity effect, self capacitance boB <boB@theresnoplacelikehome.com> - 2016-09-28 14:08 -0700
Re: More inductor talk, Proximity effect, self capacitance amdx <nojunk@knology.net> - 2016-09-28 17:06 -0500
Re: More inductor talk, Proximity effect, self capacitance "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-09-28 23:50 -0500
Re: More inductor talk, Proximity effect, self capacitance boB <boB@theresnoplacelikehome.com> - 2016-09-28 22:27 -0700
Re: More inductor talk, Proximity effect, self capacitance amdx <nojunk@knology.net> - 2016-10-03 15:46 -0500
Re: More inductor talk, Proximity effect, self capacitance Winfield Hill <hill@rowland.harvard.edu> - 2016-09-28 15:38 -0700
Re: More inductor talk, Proximity effect, self capacitance amdx <nojunk@knology.net> - 2016-09-28 19:16 -0500
Re: More inductor talk, Proximity effect, self capacitance amdx <nojunk@knology.net> - 2016-09-28 22:06 -0500
Re: More inductor talk, Proximity effect, self capacitance Winfield Hill <hill@rowland.harvard.edu> - 2016-09-28 20:17 -0700
Re: More inductor talk, Proximity effect, self capacitance amdx <nojunk@knology.net> - 2016-09-29 06:13 -0500
Re: More inductor talk, Proximity effect, self capacitance amdx <nojunk@knology.net> - 2016-09-29 08:29 -0500
Re: More inductor talk, Proximity effect, self capacitance Winfield Hill <hill@rowland.harvard.edu> - 2016-09-29 06:54 -0700
Re: More inductor talk, Proximity effect, self capacitance boB <boB@theresnoplacelikehome.com> - 2016-09-29 11:57 -0700
Re: More inductor talk, Proximity effect, self capacitance Winfield Hill <hill@rowland.harvard.edu> - 2016-09-29 12:29 -0700
Re: More inductor talk, Proximity effect, self capacitance George Herold <gherold@teachspin.com> - 2016-09-29 06:55 -0700
Re: More inductor talk, Proximity effect, self capacitance amdx <nojunk@knology.net> - 2016-09-29 10:59 -0500
Re: More inductor talk, Proximity effect, self capacitance makolber@yahoo.com - 2016-09-29 09:15 -0700
Re: More inductor talk, Proximity effect, self capacitance amdx <nojunk@knology.net> - 2016-09-29 13:16 -0500
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