Ethernet Optical Isolator for Lightning Protection?

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  • Updated 3 years ago
Lightning season is here and I've been looking for a way to isolate the 6500 from the cable modem. I searched for an optical isolator they are rather rare. This is the lowest price I could find. http://www.mouser.com/ProductDetail/H... Has anyone tried one and do you think it would be a good idea? The cable modem has no provisions for grounding to my shack ground bus.
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Steve N4LQ

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Posted 3 years ago

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W5XZ - dan

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steve: you did look at:

https://community.flexradio.com/flexradio/topics/ethernet_lightning_surge_protection

right?  you don't HAVE to go optical, though.  a wi-fi range extender will do the same thing.  Just
 upgraded mine to 'AC' speed recently, but i'm not at home and cant give a device name or model..

73
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Stan - VA7NF

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Use a fiber connection from your switch into the shack.  There are many configurations of which a few have been discussed on this forum.  aka media converter
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Paul Christensen, W9AC, Elmer

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Steve,

See this post from NN4ZZ.  You should be able to adapt it between your cable modem's Ethernet port and your router, assuming you don't have an "all-in-one" modem + router. 

https://community.flexradio.com/flexradio/topics/using_fiber_instead_of_cat5_question

Paul, W9AC




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Steve N4LQ

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In fact this is an all-in-one modem + router. 
I was thinking the "isolator" mentioned would be nice because it doesn't require any power connection. It is not optical however. It uses transformers. 
My modem is only 6 feet from the 6500 and computer.
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W5XZ - dan

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don't you think a lightning surge would fry most any small-ish transformer ??
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Steve N4LQ

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It has a 5kv rating but of course a direct strike would simply blow a hole in the shack wall. 
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W5XZ - dan

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all our utilities are under ground, but i still lose an AT&T dsl / wifi box every few years to very nearby strikes...everything is on surge suppressors too...no way i'm hard wiring my 6500 to that box !!

this works for me:
http://www.linksys.com/en-eu/products/rangeexpanders/RE6500
in the shack,

and this one sits on top of my old att dsl modem, with it's wifi turned off:
http://www.linksys.com/en-eu/products/routers/EA6500

50 60' away, two walls...solid connects 24/7
(Edited)
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AE0MW

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I use these whenever I'm concerned about Ethernet suppression.

http://amzn.com/B000BKUSS8

Having experienced a surge that 'jumped' to Ethernet in my house I'm much more paranoid than many.

I can't speak for how well they work because like most insurance policies you don't really know until it's too late! I didn't have them the last time...
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Walt - KZ1F

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I am glad you suggested that. I have one of those also. Further, I plugged my NetGear Hub into an APC surge protector and have a whole house surge protector on the service panel. And I also carry insurance on the radio, amp, ATU etc.
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Steve N4LQ

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Yes cable modems are evil beast. The cable usually has a ground of its own where it enters the home and it provides a nice path for surges. Making my PC and especially my FLex part of that loop is scary. Surge protectors might help but I don't trust them much.
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Duane, AC5AA

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I was using WiFi from the Uverse router/modem until the "stuttering" problem came along with 1.4x.  I'm hoping it gets fixed so I can re-isolate the PC from the network.  Same as you - lightning is plentiful here in the spring storms.
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W4YXU

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I have installed fiber optic from the shack to the router:

2 TP-LINK MC100CM Ethernet Media Converter   
    Item #: N82E16833704015   $67.98 ($33.99 ea)                

2 Coboc CY-OM1-SC/SC-15 49.21 ft. Orange Multimode 62.5/1 25 Duplex LSZH Fiber Patch Cable SC - SC,M-M           $32.76 ($16.38 ea)

Newegg 3Day  $10.81
Order Total    $111.55

I ordered 2 cables in case I bust one while doing frequent shack re-arrangements !

Jim
W4YXU
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Javier, KC2QII

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Steve,

 I have not used the product you mentioned but have successfully used  I have used the L-COM products in commercial applications before. 

See http://www.l-com.com/surge-protector-cat5-5e-6-data-line-lightning-surge-protectors-poe-injectors

Javier
KC2QII
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Steve N4LQ

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Thanks....
Fiber would be nice but I'm only going about 6 feet and this looks looks so easy. Not only would it stop surges but RF. Too bad they cost so much. 
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Steve N4LQ

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This device just arrived and it does not work. I'm sending it back. 
No idea why. http://www.mouser.com/ProductDetail/HALO-Electronics/PTI-451G0002/?qs=H3a2uBbsjVU5xxTjWnW15Q%3D%3D