[TowerTalk] help with interference problems

Roger (K8RI) K8RI-on-TowerTalk at tm.net
Wed Jul 18 12:58:53 EDT 2007




> At 09:48 PM 7/17/2007, Roger (K8RI) wrote:
>
>
>
>> > My Internet link is a 5.6GHz radio at the 100' level on the tower with 
>> > an
>> > 11
>> > mile shot to the ISP. I come down the tower with shielded CAT5 to the
>> > router
>> > in a trailer at the base of the tower; this is run with about 8 turns 
>> > thru
>> > a
>> > FT240-43 toroid . Then a 250' run of regular CAT5 to the house and a 8
>> > port
>>
>>Lordy...I'm running a gigabit network through 130' of CAT5e parallel to 
>>and
>>within about 5 to 10 feet of all the coax runs to the tower. (75 to 90 
>>feet)
>>It then runs under the 75 half wave sloper to the shop. I found that even 
>>a
>>metal staple used to loosely hold the cable created enough inductance to
>>screw up the network.  It won't work in metal conduit either.
>
> Huh?  they run cat5 through conduits all the time with no problem.

Maybe "they" do, but I can not get my gigabit network to operate at all
througth metal conduit.<:-))

Roger (K8RI)

>
>>   I'd hate to
>>think what'd happen with several turns on a toroid.
>
>
>
> Absolutely nothing?  I've done this more than once with no ill effects.
>
>
>
>
> 



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