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[Towertalk] remote controlling a cap

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Subject: [Towertalk] remote controlling a cap
From: (WA2BPE)
Date: Fri, 14 Jun 2002 12:36:55 -0400
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 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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