The RangeMaster is based on an older design, the TA1 AM transmitter from Triangle Digicom.

In 1999 a contractor for the department of defense took an interest in the transmitter because of its unusual characteristics for a project to communicate with underwater drones. We worked on this project for about a year.

Since 2000 we have been selling the Rangemaster AM1000 unit, we enjoy working with people to get them going with their license free radio station!