🚀 go-pugleaf

In article <1993Jan6.205946.10039@aio.jsc.nasa.gov> careyb@dallas.jsc.nasa.gov (Brian Carey 283-4181) writes:
>
>What is a ferite bead? The one talked about below.
>
>The "Y" harness might be acting like an antenna and causing interference
>with the receiver.  I have had this problem and fixed it by running the base
>of the "Y" cable through a ferite bead (one turn) to choke off the RF. This
>worked with an airtronics receiver.  When I install servos in the wings of
>my gliders I go ahead and put the ferrite bead in every installation and
>have not had any problems since.

A ferite bead is a donut shaped bead made from ferite.  Ferite is a compound
of iron and carbon (FeC3 I think).  When wires are wound around the ferite
bead (through the center, around outside, and back through center), the bead
increases the inductance of the wire and is used to supress higher
frequencies on the wire.  In this example the ferite bead is being used as
an RF choke to reduce the RF noise generated and received on the servo
leads.

I obtained my ferite beads at Norvak Electronics, a local electronic parts
store.  They might be available from Radio Shack and other electronic part
stores.