This is the ARRL/ARES power connector standard. It uses common Molex-brand two-pin Power Connectors rated for 12 Amps, and they are available at Radio Shack, packaged in pairs (RS #274-222). They will handle 50w radios and accessories, but should not be used for 100w transmitters (RS says 8 Amps, but Molex officially specs them at 12 Amps in the 2-pin connector). The pointed edge of each connector is the positive, and the solid male plug with female pins is the cable connected to the power SOURCE (battery, power supply, cigarette lighter plug). The female plastic shell gets the male (solid) pins, and is then connected to equipment pwr cables (VHF/UHF radios, TNCs, laptops and keyers). ______ _____ | ||----/\ /\ \____ | |/___/ \ / \____|___\ | | | _ | | __| | | RED + ===[FUSE]=====| | |(_)| |(__| | |======= RED + | | | _ | | __| | | BLK - ==============| | |(_)| |(__| | |======= BLK - | | | | | | | | +---+---+---+ +---+---+---+ Power Source Female pins Male pins Load Solid body Plastic shell Make Field Day and Emergency operating easier and safe, use the ARRL/ARES power connector standard!