Signal/One
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Signal/One was a manufacturer of high performance SSB and CW HF transceivers. The company started as a division of NCR in Florida. A key executive was Dick Ehrhorn, ham callsigns W4ETO and W0ID. Beginning in the 1960s with the Signal/One CX7, "S1", as they were called, made radios that were priced well above the competition and offered many advanced features.
These included passband tuning, broadband transmission, electronic digital read out, solid state design, QSK and RF clipping.
Unfortunately, although highly prized for the performance, Signal/One's products did not sell as well as hoped and the company gradually fell on hard times. Every few years, Signal/One was spun off, sold, and resurfaced at another location. At the end, Signal/One became a criminal organization and many customers and dealers lost thousands of dollars.
The remaining Signal/One products are still sought after and collected. These include the CX7, CX7A, CX7B, CX11 and Milspec models. The last Signal/One radio was a re-engineered ICOM IC-781.