Re: Powering a GPS with 6 volt.
Both Snyders and Brattons (and probably other suppliers) have two things that could be used. First is a power converter/inverter that converts 6-volt positive ground systems power to 12-volt negative ground.
The other item is a USB Charging port which has two USB charging ports and can be used with either 6 or 12 volt. The USB charging port will need a power source such as the A-Plate sold by the vendors or other power such as a "cigarette lighter" type receptacle.
Search the vendor's web sites for the correct part numbers.
Also, Tom Endy has a tech article on the Santa Anita A's web site or the Jan-Feb 2009 Restorer on how to make a setup for the power inverter.
Ken
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