Coax surge protector for cable modem - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 9 Old 03-04-2019, 06:48 AM - Thread Starter
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Coax surge protector for cable modem

Hi,

I need to replace an old powerstrip style surge protector that has coax protection. I am switching to UPS.
What kind of inline coax surge protector should I get?
Also, do I/should I ground? Common wisdom tells me yes. But never sure for a a CableTV system.
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post #2 of 9 Old 03-06-2019, 11:34 AM - Thread Starter
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For example, I found inline models like this:

https://www.amazon.com/Perfect-Visio...4XRFFAB4CXR1DW

I am assuming that this device only works if the cable is somewhere grounded.

OR devices like this that have a ground block.
https://www.amazon.com/TII-Broadband...4XRFFAB4CXR1DW

Then I would need to figure out how to connect ground. Potentially a wire to my UPS?
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post #3 of 9 Old 03-11-2019, 03:39 PM
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You will likely find my earlier post to be of interest:
https://www.digitalhome.ca/forum/186...ml#post1463911

Although you asked for info re Coax Surge Protectors, you should also bear in mind that you MIGHT need a CATV ISOLATOR, which will BLOCK DC and Low Frequency Voltages from entering your system....this is a frequent fix for Hum Noise caused by a "Ground Loop". Although SPECS for Coax Surge Protector might only mention a low freq limit of 5 MHz, this does not necessarily mean that they also block DC and Low Frequency Voltages...so you might want to check with a simple VOM continuity check to see if they DO....or do NOT block DC:
https://www.amazon.com/s?k=catv+isol...ref=nb_sb_noss

I would NEVER use a Coax Surge Protector built into an Surge Protected AC Power Strip....you want to keep static electricity and possibly near by induction of Lightning Strikes as far away as possible from YOU and your pricey Electronics. So, both the Coax Surge Protector and/or the CATV Isolator should be screwed into the existing Ground Block (which MUST be connected via a suitable wire to GROUND). This also ensures that high arc-over or dissipation currents go through a short wire to GROUND, rather than a lengthy piece of internal Coax cable. [This IS a RIGHT way....and a WRONG WAY....]

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post #4 of 9 Old 03-31-2019, 12:55 PM - Thread Starter
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I opened the cable box and took a picture. BTW. this is a town-home with 4 units. I don't see a grounding block. It looks like a tap of the brand "General Instruments". Not sure if htis is the product: http://www.arenaservicesinc.com/manu...la-GI/BTTP.pdf
Would I wire a surge protector directly into the the tap, assuming it is grounded? Using something like this?
https://www.tonercable.com/products/...protectors.php
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post #5 of 9 Old 04-04-2019, 07:39 PM - Thread Starter
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a friendly ping
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post #6 of 9 Old 04-04-2019, 07:53 PM
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My humble suggestion is the Panamax SP8-AV. Panamax has great Customer Service and superb Technical Support. Please buy it from an authorized dealer to avoid any unpleasant situations involving problems, claims or both.
Good luck
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post #7 of 9 Old 04-06-2019, 10:18 AM - Thread Starter
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Quote:
Originally Posted by Transistorious View Post
My humble suggestion is the Panamax SP8-AV. Panamax has great Customer Service and superb Technical Support. Please buy it from an authorized dealer to avoid any unpleasant situations involving problems, claims or both.
Good luck
I have a similar powerstrip currently. I want to get to rid of it as I will plug power in a UPS (which has no coax).

I think my question is evolving to what do I want to protect against?
Lighting? Reading @holl_ands I am concluding that a powerstrip coax protector uses MOV which woudl not survive lightening anyhow.

So, what are powerstip coax surge protectors protecting against? Other than lighting I woudl not expect surges?
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post #8 of 9 Old 04-06-2019, 03:31 PM
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IF your cable system is Underground (rather than hung from Power Poles), then I doubt that it has any "Surge" problems that will affect YOUR Equipment....and would likely affect lots of Cable Owned Amps prior to getting to your home anyway. I do NOT use a Cable Coax Surge Protector and have never HEARD of anyone having problems...except for homes with Cable hung from the Power Poles.

BTW: I don't really KNOW where the Cable System Ground Block is located so I can't help you....and maybe you're worrying too much anyway.
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post #9 of 9 Old 04-06-2019, 03:42 PM
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Quote:
Originally Posted by metropole View Post
I have a similar powerstrip currently. I want to get to rid of it as I will plug power in a UPS (which has no coax).

I think my question is evolving to what do I want to protect against?
Lighting? Reading @holl_ands I am concluding that a powerstrip coax protector uses MOV which woudl not survive lightening anyhow.

So, what are powerstip coax surge protectors protecting against? Other than lighting I woudl not expect surges?
Have you read or researched this product? Have you called Panamax? Where are you going to use this product? I live in NC and have not had any electronic components damaged that are plugged to my Panamax units
Your call.
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