From what I understand the "screwdriver" antenna uses the portable
screwdriver. The circuit should be the same as needed for caps. I have
not found the circuit with the limit switches but if it works for the
antenna why not for caps??
Chris opr VE7HCB
At 12:36 PM 2002-06-14 -0400, WA2BPE wrote:
>I am in the process of setting up this exact thing to remotely adjust a tuner
>using multiple screwdrivers and a simple NTSC video camera/monitor to monitor
>the settings - KISS approach. It would be best to remove the batteries and
>use an appropriate supply.. Also, some RFI filtering will be needed - like a
>0.01 across the motor terminals. It is probably a good idea to set up some
>limit switches to avoid any chance of crunching the cap, etc. Steppers are
>great and are best for an automated system, but the drive circuitry is
>considerably more complex.
>
>73, Tom - WA2BPE
>
>ken.claerbout@equant.com wrote:
>
> > Hi Howard - I have a small cordless screwdriver which I think is made by
> > Black & Decker. I see them for sale at Home Depot for around $15. It's
> > cylindrical in nature and about 10" long. I often thought something like
> > that might work well to remotely tune a capacitor or inductor. You could
> > easily connect the shaft of the screwdriver to the shaft of the cap. It
> > offers plenty of torque. The switch on the screwdriver could easily be
> > remoted back to the shack and about the only other thing, is providing it
> > with a DC source so it doesn't have to run off of batteries. Just a
> > thought.
> >
> > 73
> > Ken K4ZW
> >
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