[sdiy] S/PDIF cable

[John L Marshall]

----- Original Message -----
From: Magnus Danielson <cfmd at swipnet.se>
To: <john.l.marshall at gte.net>
Cc: <synth-diy at dropmix.xs4all.nl>
Sent: Saturday, April 27, 2002 5:58 PM
Subject: Re: [sdiy] S/PDIF cable


<snip>
> The real reason for the test? All that nonsense talk on skin-effect on
> speaker cables.
>
> Skin-effect is there, but at a totally irrelevant level IMHO.
>
> Cheers,
> Magnus - annoyed by a heavy 7.5 GHz ringing on a 2.488 Gbps optical output
>
I'm with you on skin effect.

The ARRL formula for where skin effect BEGINS: frequency (in MHz) = 124/d
(in mils) squared. So #12 AWG will just start to show effect at 19 kHz. BFD.
This is for a solid conductor. I suspect stranded wire behaves differently
even though the strands are touching. But then, there is Litz wire.

This would be heresy on the Audio or AH list.

Sometimes the measuring apparatus has a dramatic affect on the circuits
being measured.

Take care,
John