Has anyone discovered a reliable scheme for remote adjustment of vacuum variables? I have two antennas with vacuum variables at the base and would very much like to tweak them from the shack. I'd nee
what sort of adjustment speed do you need. A 8 or 16 pulse per rev disk and an optical encoder driving a suitable low impedance device (open collector type scheme) or even 8 magnets and a reed switch
Dennis, What should you think using some old stepper motors from shugar 7 inch FD we called that the washing machines. That old stuff is very reliable but need some hard and soft adaption The way I s
Yes. I bought some gearhead motors from All Electronics (www.allelectronics.com). You can buy one to provide the rotational speed you need directly, or you can gear them up or down further with inexp
Ya know... I think someone has already solved this problem... A few years back someone did this with mobile antennas - "screwdrivers" - because they used the guts of an electronic screwdriver... do n