SM-330A Switch Mode Power Supply 9–15V Variable, 25A

The Sharman SM-330A is a compact, high-efficiency switch mode power supply engineered specifically for amateur radio use. Unlike fixed-voltage supplies, the SM-330A offers a variable output of 9–15V DC (25A continuous, 30A peak) — giving you precise voltage control to suit different transceivers and accessories.

Switching noise is minimised by design, and when minor noise does occur, the built-in Noise-Offset function eliminates it — keeping your receive audio clean. A backlit meter and pre-set voltage control are included as standard. Ripple is exceptionally low at <15mVp-p at rated load, making this one of the cleaner switch mode supplies available at this price point.

Key Features

• Variable output: 9–15V DC (adjustable)
• Output current: 25A continuous, 30A peak
• Engineered to minimise switching noise for amateur radio use
• Noise-Offset function to eliminate residual interference
• Backlit meter and pre-set voltage control as standard
• Ultra-low ripple: <15mVp-p at rated load
• Output voltage regulation: <2%

Specifications

• Input: 220V AC
• Output: 9–15V DC variable, 25A continuous / 30A peak
• Ripple: <15mVp-p at rated load
• Fuse: 5A
• Dimensions: 190 × 69 × 181mm
• Weight: 2.3 kg