Signal One CX-11A Signal/One was a manufacturer of high performance SSB and CW HF radio communications transceivers initially based in St. Petersburg, Florida, United States. The totally re-designed CX11 came out in 1974 and is considered by many to be the finest American made communications transceiver ever built. In 1982, the Milspec 1030 was introduced as the first fully synthesized HF transceiver. Total production of all three models was only slightly over 1000 units. | 4 F 1 E B D Amateur R