Hi We tend to look at all this lighting / EMP stuff very much as a “get to the ground” sort of thing. For whatever reason the whole thought process stops once we get to a coper weld rod driven however far into the dirt.
If you try to operate a vertical antenna against that same rod in the middle of a nice dry summer. You will quickly find out that dirt != ground. The same fun and games that get you a low impedance ground for your antenna also apply to a low impedance ground for your protection system. Its not an identical process, but it’s the same idea. You can argue that a good bond of everything to a single point is sufficient. Looking around my house, there is most certainly *not* a single point of entry for everything. Various utilities and other wires / chunks of conductive stuff go off in a variety of directions. Like most homes in the US, it’s a wood frame structure. There is no nice steel frame to tie everything to. I suppose the first step would be to tear the house down and re-build it from scratch ….. Bob > On Aug 8, 2016, at 10:00 AM, jimlux <[email protected]> wrote: > > On 8/7/16 8:06 PM, Bill Hawkins wrote: >> This thread grows old, so here's one person's summary: >> Marine supply stores sell rolls of 4 inch >> wide copper strap for connecting the mast on the wheelhouse cabin with >> the keel of fiberglass boats. This is also the ground for all electronic >> equipment. The strap is considerably less inductive than a wire. > > No - strap is about the same inductance as a wire of the same length. The > advantage of strap is a lower RF resistance, which is important if the strap > is part of your antenna system, because it's less resistive loss than a wire. > > For lightning impulses, either conducted or radiated, the inductance > dominates the voltage rise (e.g. Xl is much larger than Rac). > > Strap or bar may be easier to make connections to (drill a hole in some > 1/8x1" bar, tap it, and hook your lug up) > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
