Thread: Discussion Fy-31ap
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Old Sep 12, 2012, 09:32 AM
small_rcer is offline
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Canada, NS, Halifax
Joined Dec 2005
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GPS issue

When mounting the GPS location is important. It is probably best to locate it on the top of the aircraft. The wire between the GPS and any other device should NOT be ribbon cable. The wires should be carefully twisted or braided to reduce inductive pickup from other RF devices. If you can make a ground plane under the device it MAY help. A ground plane could be made of PCB blank from an electronics store. or a cut up old PCB that has a large blank area.

Also other devices on the aircraft may have to be shielded by an RF shield between the device and the GPS. RF shields can take many forms. Start with aluminum foil as a cheap test. Copper screen can be used and is easy to solder. An alternative is copper foil on leads, or copper foil coated card stock, which you can cut with scissors and make into a box around devices. You may have to put RF chokes on various leads on devices. These look like black dough nuts or cylinders.

I suspect if you place the GPS as far from the other devices as the included cable permits, that you will have better results. Test all of these options on the ground.
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