I got a set for my GP a few years ago. The positive ground is one of the reasons
the the SS2K was removed from the US market. Something to keep in mind if you
are going towards a SS2K system.
Good luck,

John ;-)

--- In RoboScope@yahoogroups.com, "Ralph Javins" <n7kga@...> wrote:
>
> Good morning, all;
>
> This is just a quick report on the status of development of the
> Vixen GP-DX GEM with tracking. The Vixen MT-1 Decl. and R.A. Motor
> Drive Kit finally did come, and it has been installed. It was
> disappointing to note that the kit did not include the Manual
> Operation Clutch assemblies. That makes this kit even less of a
> bargain than it was. More stuff to order.
>
> In looking at the DIN connectors, it will be necessary to go
> through and check the wiring. Knowing where the motor voltages go is
> always useful.
>
> It was a bit of a surprise to learn that the Vixen Two Axis
> Control Box uses the less common Positive Earth (English battery
> convention) for the DC power connector. The outside sleeve is
> positive, not the center pin as I had anticipated.
>
> Have an enjoyable Fourth of July. We are anticipating a
> somewhat different one out here in Latte Land; it is quite warm and
> it is very dry. Fire hazard from errant fireworks is considerable,
> even in the city areas. That is unusual.
>
> Enjoy;
>
> Ralph Javins
> Latte Land, Washington
>