[TowerTalk] Re: HD73 Rotor Control Question

[Dale L Martin]

>   I'm not sure when the article came out, but know it was between
>   Jan 1989 and 1993.
> Good luck. If you happen to find it, please let me know. I'd like to
> get a copy of it.
> 73, Tom K5IID
>
>
>
I checked the ARRL Members website for "hd-73" and this was one of the hits:

Jan 1983 QST page 17
Automatic Control For The Alliance HD-73 Heavy-Duty Rotator
by Mehaffey, Joe, K4IHP >