SITH Racing Technical Article – Ground Loops

SITH Racing is pleased to pass along information regard Ground Loops, what they are, how they can affect your vehicle and more. This information comes from W8JI is a well known highly achieved professional and well respected Amateur Radio Operator and has passed a lot of valuable information to the greater amateur radio community taken from his over 40 years of experience in such things. SITH Racing values his contributions and find his articles well written and full of good information that should be followed.

Please enjoy the article below as provided by W8JI.

Note: This discussion only applies to grounds within a platform or system. It does not apply to cables or wiring outside a building, where lighting damage or other surges are concerns.

Ground loop problems usually occur when systems operating at low voltage and current levels have multiple ground points that operate with voltage differences. These voltage differences are created by a high current path. The ground loop interaction is an unintentional result of poor wiring or improper input or output port planning. ("port" by definition is a signal input or output connection, usually via a jack, connector, or terminal strip).


SITH Racing Promotes Good Ground Connections.

SITH Racing as well as others in the automotive community have constantly been reminded that a good battery connection and ground system is critical to vehicle performance. In light of this fact and recent issues related to the Ford Focus ST as well as other vehicles, SITH Racing would like to share a excellent article on vehicle grounding and battery location posted by CHARLES T RAUCH, JR, W8JI. Mr. Rauch is a well known and respected professional and Amateur Radio Operator who always takes the opportunity to pass his knowledge on to others. His vehicle battery installation guide, Negative lead, Dielectric compound and other articles are top notch.

SITH Racing will publish a Ford Focus ST specific grounding guide for the community with pictures and descriptions. In the meantime we know many of you are itching to enhance your vehicles ground setup and are performing battery relocations to the trunk of your vehicles. PLEASE read these articles provided by W8JI (http://www. and perform your grounding enhancements safely and securely.