[TowerTalk] OR2800 rotor cable

[Les Kalmus]

One leg of the circuit is grounded, which would be the shield if using coax.
I did not have the noise problem using unshielded multi conductor cable 
until my controller failed and M2 "upgraded" it to the current version.
Without going into the details, none of the fixes they sent me helped.
Some people have reported that the noise is not a problem when using 
coax (i.e., W3LPL).
Rather than running another wire, I switched to a Green Heron controller 
which makes no noise using the original cable.

Les W2LK

Jim Brown wrote:
> On Thu, 22 Apr 2010 10:49:59 -0400, Les Kalmus wrote:
>
>   
>> These pulses are a notorious source of noise when the rotator is in motion.
>> M2 recommends shielded cable, i.e. RG-58 to suppress that noise.
>>     
>
> Interesting. That's very different from shielded twisted pair. Question: Is 
> the circuit ground-referenced? If so, RG58 is probably the best solution. If 
> it's balanced, a good twisted pair should work as well. 
>
> 73,
>
> Jim K9YC
>
>
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