[TowerTalk] Lightning and wired networks was: Re: Lightning protection

[Jim Lux]

On 7/10/13 4:19 AM, Jim Brown wrote:
> On 7/9/2013 6:40 AM, Pete Smith N4ZR wrote:
>> Sure, but the network cables were connected directly to the computer
>> motherboards.  I have also lost a couple of RS-232 ports on my K3,
>> which now has a DB-9 surge protector on it - I'm inclined to think
>> it's a design problem.
>
> YES. Cable shields MUST be bonded to the SHIELDING ENCLOSURE (the
> chassis) at each end.  If there is no shield, the signal return must be
>
<snip about the evils of indiscriminate use of shunt mode transient 
voltage suppression>

>
> There's a lot about these issues on my website. http://k9yc.com/publish.htm
>


Standler's book also covers this in quite some detail, along with 
suggested designs.