Point taken but the principle is still valid
Alex 4Z5KS
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of
donroden@hiwaay.net
Sent: Monday, October 07, 2013 6:06 PM
To: amps@contesting.com
Subject: [Amps] Rubber Mats ( was Direct rectification of AC mains to drive
the amp, )
> Did anyone hear about the rubber mat we were talking about at the
> beginning of this thread???
> Alex
I once built a common under a computer floor out of 6 inch wide copper strap
every three feet in a grid configuration and silver soldered at every
crossing.
I insulted it off the concrete floor with 1 foot wide rubber mats.
It neasured 30 ohms to AC power common. We looked for shorts to the
concrete and metal computer floor supports with no sucess. We
"broke" the grid in half and now each section measured 60 ohms to power
common.
Turns out that there was enough carbon black in the rubber for it to be
conductive.
We substituted plastic carpet runners for the rubber mat and we measured
megohms to the power common.
just sayin' .... know what you are standing on before assuming you are
"above ground".
Don W4DNR
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