homepage Welcome to WebmasterWorld Guest from
register, free tools, login, search, pro membership, help, library, announcements, recent posts, open posts,
Become a Pro Member

Home / Forums Index / Hardware and OS Related Technologies / Webmaster Hardware
Forum Library, Charter, Moderator: open

Webmaster Hardware Forum

Lightning protection on a satellite dish?

5+ Year Member

Msg#: 406 posted 5:41 pm on May 9, 2006 (gmt 0)

I've got a new satellite dish on top of my house for high speed internet. I live in a very lightning prone area, in a mobile home. I've had two close lightning strikes in five years, including one that flashed into the house and nuked some electronics.

The dish is grounded, though I may put a bigger ground rod on it. Is there anything else I can do to protect it -- and the equipment it's plugged into, and the house it's sitting on? :)




10+ Year Member

Msg#: 406 posted 11:27 am on May 10, 2006 (gmt 0)

In addition to grounding the dish itself, you need to ground the RG6 cable going from the dish to your computer or router. You can buy a special connector that accepts two male RG6 connectors, and has a ground screw. I believe it's recommended that you create a separate grounding wire from that connector, and not use the same one you are using to ground the dish itself.

Automan Empire

10+ Year Member

Msg#: 406 posted 9:04 pm on May 10, 2006 (gmt 0)

Sounds like a great place to have a lightning rod or two installed. These should each have their own ground, away from the anode rod by the meter or the water pipe. These will offer a cone-shaped area of protection below.

Aside from commercial surge protectors, I'd be inclined to make my own home-brew arrestor too. I read of a person having problems with faxes getting blown by phone-line surges, even with a commercial lightning arrestor. He added fractional-amp fuses inline with the phone. After a lightning storm, he found the fuses blown, but after replacement the fax worked. No word on how well paired high-bandwidth applications handle a modification like this, but this should inspire the tinkerers among us.



WebmasterWorld Senior Member jtara us a WebmasterWorld Top Contributor of All Time 5+ Year Member

Msg#: 406 posted 10:11 pm on May 10, 2006 (gmt 0)

You can buy a special connector that accepts two male RG6 connectors, and has a ground screw.

Actually, what you want is a "lightning arrestor". It may just look like a connector with a ground screw, but there is (or should be) a chamber inside with an airgap between the signal line and the ground. This allows any surge to cross the gap to ground.

I assume a wide variety of these are available for satellite dishes. I don't have a satellite dish, but I do have shortwave and VHF/UHF antennas. I use an Alpha Delta "arc-plug" type arrestor. (The arc-plug is replacable in case of a hit.) These are expensive ($60) but are the Cadillac of lightning arrestors. You will lose .5db at 3gHz , .2@2gHz (probably fine - not sure what the frequency range of the convertor output on your dish is) and only come with "N" connectors, so you would need plug adapters - probably 2 female F to male N - or else install N connectors on your cable.

(It also can come with "UHF" connectors. You DON'T want those, as they are a low-frequency connector design.

Global Options:
 top home search open messages active posts  

Home / Forums Index / Hardware and OS Related Technologies / Webmaster Hardware
rss feed

All trademarks and copyrights held by respective owners. Member comments are owned by the poster.
Home ¦ Free Tools ¦ Terms of Service ¦ Privacy Policy ¦ Report Problem ¦ About ¦ Library ¦ Newsletter
WebmasterWorld is a Developer Shed Community owned by Jim Boykin.
© Webmaster World 1996-2014 all rights reserved