For the record; are you actually using an "electric R/C motor" used for flying an aircraft? You mentioned a gear reduction system. You need to be more specific of your proplem using the proper terminology for your problem. Your R/C servo unit, when used in its' properly designed orrientation, will have the jitters if there is interference from another transmitter in the area. The receiver will pick up "ALL" radio waves that are with in its' frequency band width. We use a frequency scanner at our flying field to find which frequency is being disrupted. This helps in the case of loosing control of any specific radio being used. As far as your mentioned problem, is this being used in an aircraft or another factioned other then R/C flying? Your servo could have a loose connection if you have changed out an existing micro-motor to another housing. If there are loose connections on the drive motor, then you will have possible short. Otherwise if this is an aircraft application, you have several situations that can cause the jitters. Is your receiver crystal the correct bit? Has it been changed out from another radio pack? If so, you should consider having it calibrated and tuned to your transmitter. If you are using an electric motor, with a gear redux system to fly an airplane, has your prop been balanced? Are you trying to used too large of a redux rate for your electric motor? Certain motors can only handle "X" amount of current load. If there are "NOISE" problems comming from your motor, then you need to incorporate some small capacitors accross your hookups to help quell the frequency disturbance. Plus, you should have your receiver insullated and away from your main electric motor. There shuld be at least two firewalls and a minimum of 4" distance away from your drive motor. Your receiver should be located behind the voltage regulator/ speed controller of your electric motor. Your build should be, motor on the forward bulk-head, speed controller behind the first bulk-head compartment, a bulk-head between the controller and the receiver and servo tray compartment. This will help quell your interference on the receiver. Next make sure your prop has been balanced! This is the best you can do and make sure your motor is rated for the particular gear redux system being used. Too much of a load on the electric motor will overheat and distroy your investment. I fly with the Hill AFB Falcons R/C group in Utah, USA. There are several electrics out here and it is common for someone to burn up an electric due to not allowing it a cooling down period. These motors can only go for about 15 minutes of full out flying before they start to come apart from the heat. If you are using a an un-balanced prop, this will increase the load problem and cause your vibration jitters. Plus a miss-alignment of the gear redux to your motor can cause a sevear vibration at full load. You need to create a test bed for your motor, gear redux and prop assembly, then put it through a pre-install testing. This can help you find the culprit and then you will know where to start on the fix. Sorry about the first comments stated, I had to re-read your problem and deciffer the quest you are on. You mentioned problems that led me to beleive you had pulled apart a servo micro-motor and was trying to use it out of its' own environment. There are several places on the web that are specific for electric flight, I am sure you can get an electrical schematic on how to improve your noise problem as well. Good luck.