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Re: LF: RE: Question about ground impedance at 8.97 KHZ Stefan.

from [Stefan Schäfer] [Permanent Link][Original]
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: RE: Question about ground impedance at 8.97 KHZ Stefan.
From: Stefan Schäfer <schaefer@hst.tu-darmstadt.de>
Date: Sat, 27 Mar 2010 00:46:25 +0100
References: <000001cac47a$f4ba1350$0202a8c0@laptopcore2> <4B9F82C9.3000301@abelian.org> <4B9FB3F5.6030707@iup.uni-heidelberg.de> <4B9FE483.8020806@abelian.org> <006D51ECA524413B84D8C0019B2FE99C@JimPC> <4BA130EC.1040509@abelian.org> <38A51B74B884D74083D7950AD0DD85E82A1B6E@File-Server-HST.hst.e-technik.tu-darmstadt.de> <FBCMCL01B01kkwu1BtW000fea1d@FBCMCL01B01.fbc.local> <38A51B74B884D74083D7950AD0DD85E82A1B6F@File-Server-HST.hst.e-technik.tu-darmstadt.de> <7.0.1.0.2.20100318125222.045605b0@vlf.it> <38A51B74B884D74083D7950AD0DD85E82A1B77@File-Server-HST.hst.e-technik.tu-darmstadt.de> <7.0.1.0.2.20100319123829.045d7e70@vlf.it> <38A51B74B884D74083D7950AD0DD85E82A1B7D@File-Server-HST.hst.e-technik.tu-darmstadt.de> <7.0.1.0.2.20100319135419.045d7c80@vlf.it> <38A51B74B884D74083D7950AD0DD85E82A1B7F@File-Server-HST.hst.e-technik.tu-darmstadt.de> <9FB6EC199E55405DBB845075039C5EE1@White> <7.0.1.0.2.20100320223352.03804190@vlf.it> <4945036F9963407A9E065F8CFFCBCBF9@Black>
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Thread-topic: LF: RE: Question about ground impedance at 8.97 KHZ Stefan.
Sri, i have to correct that: If taking my 553mH and a Q of  82 one arrives at R = 380 Ohm. I mentioned a R of abt 300 Ohm but this is the DC resistance. The difference might be due to the proximity effect and/or some lossy things in the stray field of the coil during the resonance and Q measurement. Maybe Q is higher if i measure it on the hill (when it's placed on the wooden chairs, dry)...
 
73, Stefan/DK7FC
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