150 kHz – 29,999 kHz (Continuous) and FM 87.5 – 108 MHz.
The Radio Shack DX-390 (Catalog No. 20-214) is a digital synthesized multiband receiver, rebadged from the Sangean ATS-818 radio shack dx-390 owners manual
But decades later, a common problem plagues collectors and new owners: Essay: Examining the Radio Shack DX-390 Owner’s Manual
The 1/8” mini-jack for SW/AM is highly recommended because it completely disconnects the internal antennas, reducing interference—a feature rare for portables of that era. Popular Modifications (Beyond the Manual) radio shack dx-390 owners manual
You can find the (Cat. No. 20-214) owner’s manual and technical documentation through the following sources: Online Viewing & PDF Downloads