LM30-A Linear Power Supply, 30A, 5-15V Adjustable / 13.8V Fixed DC, Analogue Meter

The Sharman LM30-A is a heavy-duty, 30A linear regulated DC power supply — the preferred choice for serious CB and amateur radio operators who demand the cleanest possible power with zero switching noise. Unlike switch-mode supplies, a linear power supply produces virtually no RF interference, making it ideal for use alongside sensitive radio equipment. With both adjustable (5–15V) and fixed (13.8V DC) output modes, a built-in analogue meter displaying voltage and current, a cigarette lighter socket output (10A max), and automatic short-circuit and over-current protection above 30A, it's a comprehensive bench power solution. Accepts UK mains input of 220V AC.

Key Features

• 30A output current
• Adjustable DC output: 5–15V
• Fixed DC output: 13.8V — standard voltage for CB & ham radio equipment
• Linear design — zero switching noise, no RF interference
• Built-in analogue meter — displays supply voltage and current
• Cigarette lighter socket output: 10A max
• Automatic short-circuit protection
• Automatic over-current limiting above 30A
• 5A fuse protection
• Input: 220V AC
• Dimensions: 300 x 150 x 240mm (W x H x D)
• Weight: 9kg
  

Technical Specifications

• Type: Linear regulated DC power supply
• Input voltage: 220V AC
• Output voltage: 5–15V adjustable / 13.8V DC fixed
• Output current: 30A
• Protection: Short circuit & automatic current limiting (>30A)
• Meter: Analogue (voltage & current)
• Cigarette plug terminal: 10A max
• Fuse: 5A
• Dimensions: 300 x 150 x 240mm (W x H x D)
• Weight: 9kg