Radio Shack Dx-390 Owners Manual Jun 2026

Requires four "D" cell batteries for main power and three "AA" batteries for memory/clock backup. It can also use a 6V DC adapter (center pin negative).

: Requires 6 "C" cell batteries for main operation and 2 "AA" batteries for the clock/memory backup. Always use fresh AA batteries to avoid losing your saved presets. radio shack dx-390 owners manual

But decades later, a common problem plagues collectors and new owners: Requires four "D" cell batteries for main power