[TowerTalk] CAT 5 for SteppIR Remote Driver?

[K8RI]

On 7/25/2012 9:23 PM, Jim Brown wrote:
> On 7/25/2012 1:15 PM, Steve Jones wrote:
>> Do I need a separate CAT 5 cable for each antenna's Remote Driver, or can a
>> single CAT 5's four pairs handle two SteppIR antennas?
>
> CAT5 is great cable, and has great noise (and RF) immunity if you use a
> pair for each signalling (or control) circuit, BUT it's pretty small
> gauge,

And solid so it's pretty fragile.

73

Roger (K8RI)


so the loop resistance can be high.  Study what SteppIR says
> about the loop resistance of that control line and do the Ohm's Law
> arithmetic. If they define resistance by a certain length of a given
> wire gauge, you can make use of the fact that three wire gauges is half
> (or double) the resistance.
>
> Another trick -- if you use a pair per circuit and tie all the returns
> together on both ends, they're all in parallel, which for a lot of
> circuits is equivalent to cutting the loop resistance nearly in half.
>
> 73, Jim K9YC
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