SM-30 Switch Mode Power Supply 13.8V / 9–15V Variable, 20A

The Sharman SM-30 is a compact, lightweight switch mode power supply offering both a fixed 13.8V DC output and a variable 9–15V DC output — selectable to suit different transceivers and accessories. Output current is 20A continuous (30A peak), making it well suited to CB radios, amateur radio transceivers, and 12V accessories.

A Noise Offset volume control knob minimises switching interference for sensitive radio equipment. A voltage adjustment knob, combined with a built-in voltage and current meter and meter calibration button, gives precise control over the output. An output control switch allows the DC output to be toggled independently of mains power. Protection covers short circuit, over voltage, and current limiting — safeguarding both the supply and connected equipment.

Key Features

• Output: 13.8V DC fixed or 9–15V DC adjustable
• Current: 20A continuous, 30A peak
• Ripple: <80mVp-p at rated load
• Noise Offset volume control for RFI reduction
• Voltage adjustment knob + voltage & current meter
• Meter calibration button
• Output control switch
• Short circuit, over voltage, and current limiting protection
  
• Input: 220–240V AC
  
• Dimensions: 155 × 70 × 205mm
• Weight: 1.5 kg