Technical, Techniques, Hints, and Tips > Radio Equipment

rudder interference

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Doc:
Good Grief!  If you've got a winning lottory ticket don't bet it on some of the stupid things I have / haven't tried... some I won't admit to.
 - 'Doc

wombat:
One thing that hasn't been mentioned - make sure that you get ceramic capacitors rather than, say polyester or polycarbonate caps - they will not supress the noise anywhere near as well (if at all).

If it is garbage coming up the lines from the motor, the full monty suppression system I have used in other applications can be tried - Break both lines to the motor, insert in each one a 100uH inductor with a suitable current rating. On each side of the inductor place 100nF ceramics line to line. Also place in 10uF tantalum capacitors if you are running the motor single direction (don't use them if the motor is reversing.)

Tim (the Wombat)

malcolmfrary:
I agree with all that has been said about fitting capacitors but dont forget to check that the power wiring is in good condition.  A bit of "black wire corrosion" can be a real pig to track down, and can give just the symptoms described.  It introduces a small, but varying resistance in the supply, and this will affect the voltage at the BEC - an additional benefit is that often the resistance will increase as the problem areas temerature increases due to the current load.  As any servo relies on having a stable voltage supply, any variation will cause glitching.  Its difficult to measure as well, mostly because you cant connect a probe from the voltmeter reliably and not disturb the problem.
Been there, been caught, read the book......

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