resistance of cables and plugs etc.

[Rene Schmitz]

At 14:43 07.04.1998 +0200, you wrote:
>Has anyone the following resistance values at hand:
>
>a) 6,3mm audio-plug/socket resistance (my estimation 20mOhm)
>b) resistance per meter of shield of "normal" shielded audio cable used
with (a)
>   (no fancy "high end" as thick as my arm, my estimation 7 mOhm/m)
>c) resistance per meter of signal line of "nomal" shielded audio cable
>   (my estimation 28 mOhm/m)
>d) sheet resistance of 0.035mm thick Cu PCB (i think that is the "normal"
stuff)
>   (my estimation 0,5 mOhm/square)
>e) what does a solder point contribute to all these resistances ?

>If I could measure such small resistances, I would do it...

There was a mOhm to mV convertor in the july/august issue of the german Elektor
magazine, that you could use. Its a 1Amp constant current source, and is
just some 10 
components. If you don't have that issue I can copy you the schem.

-René
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