[TowerTalk] from towers to shack

[Jim Lux]

On 12/8/13 6:37 PM, Steve Maki wrote:
> On 12/8/2013 8:29 PM, Jim Lux wrote:
>
>>> my question is about which is TECHNICALLY the best option, if there is a
>>> technical benefit or about RFI to put them under ground. If there's no
>>> advantage, is much easier to manage the cables OVER the ground
>
>> Mechanical protection is what's good about underground.
>> There's not a lot of practical difference from an RFI standpoint (either
>> can be good or bad..)
>
>
> I always assumed that common mode currents should be at least slightly
> attenuated by the surrounding earth, but maybe not...
>

Probably, but also probably not as well as a single 2.4" 31 mix toroid 
would do..

Depending on dirt to do your RF choking is a pretty sketchy maneuver.

I suppose buried wires are less likely to be hit by lightning, but I 
kind of consider that a "mechanical" factor, more than an EMI/EMC factor.