This falls under older technology, but, if you have such, it can work.

I use an Alliance Hd73 with my old Science for the Blind broadcast meter
reading box connected across the two wires which feed the voltage from the
motor back down to the meter. The SFB box is a variation of a Wheatstone
bridge, a simple circuit which can do lots of magic when coupled with a good
imagination and a good friend who can solder.

For newer rotators, there was a QST article two or three years ago called
"The Rotator Pal." It adds   pointer-control to the Ham M series. Farr
circuits had the boards.

Idiom Press now makes an adapter board which allows for pointer control,
pre-sets, and (for a little extra bread) computer control. This product was
written up in the "New Products" section of QST within the past three
months. I think it was in May. You can read about or order this board
through a link at qth.net.

Norm's Rotor Service, a repair shop whose address I don't have in front of
me, also use to adapt certain rotators for a price. I think I found a link
for him not long ago. I'll try again and post it if I find it.

I still have an old Alliance U-100, one of those "click stop" models.
Everyone knew when you were turning an antenna using that thing, but, it
worked for us right out of the box! It's just not heavy enough for a real
tri-bander.


Mike Duke, President
American Council of Blind Radio Amateurs