[time-nuts] GPS antenna and lightning

[Florian Teply]

Am Sunday 04 October 2009 12:43:16 schrieb Rex:
> Kevin,
>
> That is a very informative description.
>
> I've not lived in a lightning-probable area with antennas. Here
> lightining is a remote possibility, but I'm trying to digest what you
> have told us.
>
> You said, "For example, if you have equipment plugged into two different
> surge suppressors, you can have lightning pass in one and decide to send
> half of its energy out through the other via your equiment."
>
> I don't get exactly what this means.
>
> Say I have two or three radios, each with a coax running to an antenna.
> Obviously I would run them all through the well grounded plate you
> describe. My thought is that each of them should have a lightning
> supressor feed through right at the plate, not sure if I have the
> terminology right, but a comercial arc-over (probably gas filled)
> lightning supression device.
>
> So the different supressor problem you mention is what confuses me. Does
> the configuration I mentioned for multiple radios, have something to do
> with what you say is a problem, or is it something else. If what I
> described is a problem, how can one handle multiple feeds?
>
Well, i'd say as long as the suppressors are mounted onto the same plate, 
they'd count as one thing. Just make sure, the path to ground is much lower 
in impedance than the path to the inside.

Just my 2 Cents,
Florian