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eHam Forums => Station Building => Topic started by: KJ4DIS on July 16, 2008, 02:05:14 PM



Title: Cable TV Surge Suppressor
Post by: KJ4DIS on July 16, 2008, 02:05:14 PM
Comcast is my cable TV provider. The entry point and splitters are locked up in their box on the side of the house. How can I go about adding a suppressor on the entry line?

Also, I have read that some people who have added suppressors have weaker signals or have lost HD channels. Do I need to watch out for anything in particular when choosing a suppressor?


Title: Cable TV Surge Suppressor
Post by: KB9CRY on July 16, 2008, 05:31:27 PM
Look at ICE and call them with your questions.


Title: Cable TV Surge Suppressor
Post by: K9KJM on July 17, 2008, 03:14:04 AM
Yes, I.C.E. Has some of the better deals on good arrestors.

http://www.iceradioproducts.com/impulse1.html#1

One can simply be added after the cable company lockbox.

HOWEVER note that your properly installed and bonded ground system is MUCH more important than any "device"

http://members.cox.net/pc-usa/station/ground3.htm


Title: Cable TV Surge Suppressor
Post by: AA4PB on July 17, 2008, 05:07:34 AM
The shield of the cable is "supposed" to be grounded by the cable company, probably to the block inside the locked box. I'm not sure simply adding a suppressor to the line is going to accomplish anything unless the cable installer didn't connect the ground like he was supposed to.


Title: Cable TV Surge Suppressor
Post by: K8AC on July 18, 2008, 05:27:57 PM
Buy one of the suppressor boxes that includes protection for the AC line, telephone line, and coaxial cable feeds.  I currently use TrippLite boxes and they come with a guarantee of protection for attached devices - many such surge protectors include that.  I had two damaging strikes prior to improving my home lightning protection and everything attached to the TrippLites survived just fine.


Title: Cable TV Surge Suppressor
Post by: N1QOQ on July 20, 2008, 10:46:30 AM
Why would anyone think that grounding the shield of coax stop a surge on the center conductor?