Lightening arrestors are an important part of a protection system but just installing some in the antenna cable is not going to help so much. You need a system approach. If you do it right you can take a direct hit
The big problem with grounding is Ohm's Law. That is if any current flows in a conductor that has resistance there will be a voltage across the conductor equal to the current times the resistance. But with lightening you can have 100,000 amps of current in a ground wire. If that wires has 0.01 ohms of resistance you have 1,000 volts above true ground on your "ground" connector on the lightening arrestor. Your ground is no longer at ground. You need some very tiny resistances and to get that you are going to need to do things like using multiple ground rods and large conductors. And connecting grounds together. On Thu, Oct 16, 2014 at 4:34 PM, Dave M <[email protected]> wrote: > I'm looking for effective coaxial lightning arrestors for my GPSDO > antennas. > I've seen several types; those completely enclosed in a one-piece metal > enclosure (no replaceable components) and those having a replaceable gas > discharge tube seem to predominate the list. > I'm looking closely at the gas discharge tube types, and am curious as to > their effectiveness and durability. I'd like to know stuff like; are they > effective in dissipating a static charge, how do I know when the gas tube > needs to be replaced, are the gas tubes of a special type, are replacement > gas tube easily available, etc. > > I'm interested in opinions and experiences with arrestors and > recommendations for which type is most effective. > > Thanks for comments, > Dave M > _______________________________________________ > 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. > -- Chris Albertson Redondo Beach, California _______________________________________________ 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.
