[TowerTalk] RF in rotor control ?

[W2RU - Bud Hippisley]

On Nov 8, 2008, at 9:48 AM, Jorge Diez - CX6VM wrote:

> Hi Steve,
>
> Prosistel control (original with PST61D rotor). From control to  
> MFJ-434 is 1
> feet.
>
> I disconected the ground from MFJ-434 to get it longer from  
> controller and
> no problem. Seems the problem is when conected to ground!!...
>


This sounds similar to a problem discussed many years ago about hum  
induced in receivers by the TailTwister T2X rotor controller when the  
brake solenoid was activated.  As I recall, the "quick" solution was  
to switch from the 3-wire power cord plug that was stock on the T2X  
box and use a 2-wire adapter or other means of breaking the safety  
ground.  I think the person who analyzed the problem back then said  
the symptoms indicated a problem with the ham's shack grounding.

Bud, W2RU