Self resonance of a coil

• To: List Tesla <tesla-at-pupman-dot-com>
• Subject: Self resonance of a coil
• From: huffman <huffman-at-fnal.gov>
• Date: Fri, 11 Oct 1996 08:35:40 -0500

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Hi Group,
If I know the dimensions of a coil, i.e. r=diameter/2, wire gauge,
l=length, n=number of turns,
is there an approximate formula for the self-resonance? I thought I had it
but can't find it now,
or maybe it doesn't matter if the coil is top loaded with a large toroid. I
know the
inductance is found approximately by L=n*n(r*r/(9*r+10*l)) so I use the
1/2PIsqr(LC).
Just curious,
Dave

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