[1000mp] Braid or strap for ground wire...big question.

[Don W5FKX]

Well, I guess I'll wade into this one. I believe that Charley/K4VUD raised
the issue initially. As some have mentioned (but not explained) the
difference between braided wire (of any kind) and solid wire when used in
ground paths is in regard to RF vs. DC currents. As far as DC is concerned,
there is no difference. However, when it comes to RF currents, there is a
BIG difference. Because of the self-inductance among the various conductors
of the braid, there can be a significant amount of reactance to RF current
flow that arises. For this reason, it is usually strongly recommended that
ground conductor paths should consist of solid conductor and NOT braided (or
twisted) multi-conductors. Also, since conductance at HF is at "skin-depth"
(ie, within the first few atomic layers), the surface area is more important
than the volume geometry (ie, tubular is as good as round, square, flat).  I
use a 4 ft length of 3/4" copper tubing "bar" that spans the back of the
operating desk, which is then connected to my external ground system with
2ga. (~1/4") solid copper wire. All equipment is then tied to the "bar". One
of these days, I need to replace the 2 ga. wire with wider, flat, solid
flex-stock, or 1/2" soft-drawn copper tubing!

73,
Don W5FKX