I have just fitted an external gyro to the 12/20 Gyro I have (giving me a second gyro) and I am having problems with it causing the servo's it controls to pulse.
The pulse rate is slightly less than a second apart and causes the control surface to move 10% to 15% deflection.
It is not there all the time but comes and goes. Cannot find a trigger so far.
I have moved the the gyro external to the plane in the hope that it was just picking up interference from something but it has made no difference where the gyro is located.
The gyro is a simple one with a sensitivity control only. I have tried it at Max and Min sensitivity but the pulses remain, and at the same intensity.

Is this a known problem with using the external gyro connection, or have I missed a setting somewhere?
Would getting a Futaba GY240 be any better or would I have to go to something like the Futaba GY401?