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DF3VI > TECHNIK 28.05.06 10:51l 18 Lines 682 Bytes #999 (998) @ WW
BID : S5GDB0OVN02A
Read: GUEST DL1LCA
Subj: Re: Skin depth in copper
Path: DB0FHN<DB0FOR<DB0SIF<DB0CWS<DB0ZDF<DB0LJ<DB0OVN
Sent: 060528/0945z @:DB0OVN.#NRW.DEU.EU [BCM West<>Link-Neus] obcm1.06 LT:998
From: DF3VI @ DB0OVN.#NRW.DEU.EU (Patrick)
To: TECHNIK @ WW
X-Info: Sent with login password
Hello Ralph.
> Bet you thought skin depth at 50 Hz was irrelevant, I did until I
> did the sums.
> Frequency Skin depth
> 50 Hz 9.35 mm
That IS irrelevant. Even for somewhat higher frequencies you rarely have a
_massive_ conductor where skin depth matters. A massive copper conductor of
almost 20 mm diameter (300 mm^2) cannot be handled, that is why stranded
conductors are used. Now it is the diameter of each strand that counts.
So yes, skin effect does not start to matter until you are in the MHz,
or in the high power/current transmission.
73, Patrick
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