Forsberg StarLink DGPS Coax Down / Up Converters (DUC) converters are the perfect add-on for L1 GPS installations where long antenna cables are needed and a simple in-line amplifier will not suffice.
The DUC product is optimized for generic RG-58 cable and can be used for lengths of up to 450 meters.
You may recognize this as a Raven StarLink product. Forsberg took over Raven StarLink RF DGPS product line in April 2015. NavtechGPS is the exclusive North American distributor for Forsberg StarLink DGPS products.