Can I control the amperage remotely without going back to the power source?

Yes, an optional remote weld output control is available that provides current control without returning to the power source, saving time and effort. The RF-10 Remote Current Control Facilities must be installed first, and then either the RHC-3 Remote Hand Amperage Control or the RFC-23A Remote Foot Amperage Control can be used. (Pages 1, 3)