The Radio Shack DX-390 is a sophisticated digital communications receiver designed for "DXing"—the hobby of listening to distant radio stations. Manufactured by Sangean (as a rebadge of the ATS-803A), this unit offers a seamless blend of portability and desktop-level features, making it ideal for both home use and travel. Key Features Broad Frequency Coverage
For its era, the manual’s technical information is functional and accurate, though it omits deep theoretical explanations (e.g., detailed RF front-end design or signal propagation theory) that the target consumer would not require. radio shack dx-390 owners manual