[TowerTalk] The details of wiring a homebrew AZ/EL rotator

[Lizeth Norman]

The rotator is complely homebrew. Cables carry various DC signals. One
cable carries 2 motor poles (4 wires), the other carries a 3 wire sensor
set with ground and +5Vdc (total 5 wires)


On Sat, Jan 25, 2014 at 1:02 PM, Nate Bargmann <n0nb at n0nb.us> wrote:

> * On 2014 25 Jan 11:16 -0600, Lizeth Norman wrote:
> > I have double shielded 18Ga 4 twisted pair wire.
> > When I terminate the wire, what do I do with the braid shield. There will
> > be 40W UHF or 50W VHF max around, so the idea of protecting my sensor's
> (5V
> > ttl) wiring is something I'm concerned about.
>
> Ordinarily I would think that grounding one end would be the correct
> thing to do.  As I've not done what you're doing on a tower, I would
> consider bonding it to the tower ground at the bottom where it breaks
> away to the shack and not bond it to ground at either of the terminating
> ends.  It seems that would drain off lightning static and any stray
> transmitted energy.
>
> Does the controller manufacturer offer any suggestions?
>
> 73, de Nate >>
>
> --
>
> "The optimist proclaims that we live in the best of all
> possible worlds.  The pessimist fears this is true."
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