Suitable Power Supplies

The power supply for this apparatus is a fixed voltage stable low ripple (<50mV) D.C. power supply with an output voltage of 12V at a current of 5A. The unit should have short circuit protection and (mains input voltage) overload protection. Many such units are available.

Low price power supplies
  1. Electrospeed PUP80-12-B1 (order code 274-8094L) price £79 + VAT
    • 80w 6.7A max
  2. Electrospeed PUP56-12-B1 (order code 274-3195C) price £50.35 + VAT
    • 56w 4.6A max

    See attached data on webpage at http://www.electrospeed.com/

  3. Maplin PT105. price £34.99 incl. VAT (very cheap)

    This unit is designed for amateur radio use. It is a fixed output unit with mains input lead and screw terminals for the output.

    Specification:
    • Input voltage 230 Vac
    • Output voltage 13.6V fixed
    • Output current 5A continuous
    • Output ripple 8mV rms
Medium price power supplies
  1. Electrospeed NFS110-7901P (order code 26144786B) price £101.72 + cover kit at £18.60

    This unit is a switch mode encased power supply with screw terminals for (mains) input and DC output. It is rated for some kinds of medical use.

    Specification:
    • Input voltage 120 to 370 Vac
    • Output voltages 12V , 5V, -12V, -5V
    • Output current (12V) 5A continuous
    • Safety ground leakage current 100μA max
    • Isolation Input/output 3750V Input/chassis 1500Vac
    • Safety approvals IEC601, UL544, CSA22.2-125
    • Dimensions H50 x W110 x L257mm

  2. Electrospeed EMS 4033 (order code 274-15840B) price £140

    This unit is a switch mode encased power supply with screw terminals for (mains) input and DC output.

    Specification:
    • Output voltage 12V fixed
    • Output current 5A continuous
    • Output ripple <50mV RMS
    • Dimensions H50 x W110 x L257mm