That 1 meg resistor not only causes a slow discharge of any static buildup
on you it also protects you. You could easily get a good zap by connecting
yourself with a solid wire to what you think is "ground." Don’t think that
you can save money by hooking up a test lead to your wrist watch band
That 1 meg resistor not only causes a slow discharge of any static buildup
on you it also protects you. You could easily get a good zap by connecting
yourself with a solid wire to what you think is "ground." Don’t think that
you can save money by hooking up a test lead to your wrist watch band and
They don't need one.
The idea is to keep you, your tools, the equipment your working on and
your PSU, antenna, test equipment etc at the same potential. It doesn't
matter what that potential. Your mains electricity supply ground is
certainly sufficient as most things will already be connected
Indeed, some house grounds have induced voltages in having long runs back to
any ground point; and might not be the safest thing to tie your static mat
to as a "ground" point. "Ground" in AC systems may have imbalance phase
currents and be much different from a zero voltage point. It shouldn't
What you are seeking rather than an earth ground, is to tie the commons of
the equipment you are working upon, and yourself, suitably protected by the
wrist strap internal resistor, to the same point, and thus voltage
potential. You are trying to have everything at the same potential before
yo
Fred, N3CSY wrote:
Various outfits
sell anti-static pads, wrist straps, wrist straps
with series megohm protection - but none ever
mention where these devices are supposed to pick
up a reliable earth ground? Or don't they
need one? I don't think one can rely on their
house wiring to find a rel
I've seen a lot of "anti-hazard" warnings here and
there for our K2 building process. Various outfits
sell anti-static pads, wrist straps, wrist straps
with series megohm protection - but none ever
mention where these devices are supposed to pick
up a reliable earth ground? Or don't they
need o
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