Radio Shack Dx-390 Owners Manual [new] | 2026 |

A common point of confusion not always emphasized is that it requires 7 batteries total

: Supports AM, FM, and Single Sideband (SSB) with a variable Beat Frequency Oscillator (BFO) control for ham radio and maritime broadcasts. : 45 total presets (18 for SW, 9 each for AM, LW, and FM).

Press and hold either the or DOWN arrow scan buttons for more than one second. radio shack dx-390 owners manual

: This is arguably the most common issue. A static discharge can destroy the sensitive Q1 front-end FET (Field-Effect Transistor) [originally a 2SK152], rendering the radio "deaf" on HF.

Rule of Thumb: Use LSB for frequencies below 10 MHz, and USB for frequencies above 10 MHz. Fighting Interference A common point of confusion not always emphasized

Even with the manual, these radios are 30+ years old. Here is how the manual helps you fix three common problems.

If you're traveling internationally, you'll need to adjust the AM (MW) tuning step. Most of the world uses 9 kHz steps, while North America uses 10 kHz. The manual explains that the selector switch is located . : This is arguably the most common issue

Slowly adjust the on the right side of the radio until the "Donald Duck" distorted voice shifts into a clear, natural-sounding human voice. Maintenance and Troubleshooting Tips