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

[Pete Smith N4ZR]

Alas, when you are a history major working with pre-made serial cables 
and USB-to-serial converters with pre-molded cable terminations 
shielding and shield terminations are apt to be iffy at best.

73, Pete N4ZR
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On 7/10/2013 9:37 AM, Jim Lux wrote:
> 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.
>
>
>
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