Samlex SEC-1225G – 13.8 V / 25 A Low-Noise Switch-Mode Power Supply for HF/VHF Transceivers

Samlex SEC-1225G: Heavy-Duty 25 A Switch-Mode Power Supply for HF/VHF Transceivers

Engineered specifically for demanding HF/VHF base station operators, digital mode DXers running high duty-cycles (FT8, RTTY), and land-mobile communications systems. The Samlex SEC-1225G provides continuous, clean 13.8 V DC current for 100 W transceivers without degrading receiver sensitivity or adding hash to your operating bench.

Key Features & User Benefits

• Advanced RFI/EMI filtering (FCC Class B compliant): Strict high-frequency suppression eliminates switching noise and birdies across all amateur bands, ensuring a clean receiver noise floor on vulnerable lower HF frequencies.
• 23 A continuous load rating (25 A surge limit): Robust secondary stage runs 100% duty-cycle modes like FT8 or long FM QSOs without thermal throttling, voltage collapse, or unexpected shutdowns.
• Thermally controlled, variable-speed forced cooling: The fan scales quietly with heatsink temperature, delivering whisper-quiet RX operation while ensuring reliable thermal dissipation under sustained TX cycles.
• Multi-stage protection suite (OVP, OCP, OTP, SCP): Automatic protection circuits cut power instantly during short circuits, continuous overloads, reverse polarity, or overheating, preventing damage to the power amplifier (PA) stage of your transceiver.
• Compact, rugged metal enclosure: Heavy-duty chassis occupies minimal operating space in the shack while resisting mechanical stress during field days and portable deployments.

Technical Specifications