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Re: LF: Measurement of antenna current Correction

To: [email protected]
Subject: Re: LF: Measurement of antenna current Correction
From: "Andrew Talbot" <[email protected]>
Date: Sat, 12 May 2001 21:06:07 +0100
Reply-to: [email protected]
Sender: <[email protected]>
I measured the thinkness of some (Sainsbury's own brand) foil at 0.03mm.
This equates to  0.13 skin depths.
It is even worse.  I read the micrometer wrong,  a very ancient one
calibrated in those US units of 25.4mm called inches,  (cost nothing so I
live with it)

The kitchen foil is 0.02mm thickness, so 0.09 skin depths
Current penetration EXP(-0.09) = 0.91   so only 9 percent screening at
137kHz

Andy   'JNT



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