Topband: DC Motor for turning Capacitor?

Larry Higgins n9dx at comcast.net
Wed Jan 7 20:51:35 EST 2004


Subject: Topband: DC Motor for turning Capacitor?


Can someone suggest a dc motor for turning a remote capacitor on an inverted
L?  Sears has a battery operated screwdriver on sale for $9.98, but it is a
150rpm.  Any suggestions would be appreciated.
Pat, K8PC

For shunt fed or permanent magnet DC motors, speed is proportional to the
armature voltage.  The sears screwdriver is most likely to be a permanent
magnet type.  Scaling down the voltage scales down the speed.  For example,
if the original voltage is 6 volts at 150 rpm, then 0.6 volts will run it at
15 rpm.

73
Larry, N9DX



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