[time-nuts] GPS antenna selection - lightning
jimlux at earthlink.net
Mon Aug 8 10:00:29 EDT 2016
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)
More information about the time-nuts