Various Power Supplies

PSU-1228 / PSU-1250

Small, switched power supplies with up to 28/50A.

These power supplies offer in a small case everything the radio amateur needs. The power supplies are either switched to fixed 13.8V, or to a variable output voltage between 9 and 15V. The maximum current may be up to 28A (PSU-1228, 20A continous) or 50A (PSU-1250, 40A continous). This is sufficient for all 100 W transceivers. The built-in fan is temperature controlled. With little load the fan does not run at all, the PSU-12xx is absolutely quiet. Only with a longer and higher load the fan starts to run to cool the internal electronics. In cases where interferences occur, the PSU-12xx offers a control which shifts the frequency of the birdies, if required. The back-lit instrument shows (selectable) either Voltage or Current. All controls are conveniently located on the front, the 230VAC and DC connectors are on the rear. The PSU-1228 has the same front panel size and layout as the well known SX- series SWR/power meters and so fits perfectly into the ham shack. The PSU-1250 has the same design but is somewhat larger.

Technical Data
PSU-1228 PSU-1250
Input Voltage 180 - 240 VAC 220 VAC
Output Voltage 13.8V fixed or 9-15V adjustable
Output Voltage Regulation < 2%
Protection Short Circuit, limited to 28A Short Circuit, limited to 50A
Output Current 28A max., 20A continous 50A max., 40A continous
Ripple < 80mVpp at rated load
Fuse (Primary) 5A 8A
Size (without controls) 155 x 70 x 205 mm (WxHxD) 195 x 85 x 280 mm (WxHxD)
Weight ca. 1.5kg ca. 2.5kg
Order No.
PSU-1228 Switching Power Supply 28A 89.00 € Buy now
PSU-1250 Switching Power Supply 50A 139.00 € Buy now
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SPS-1050S Switching Power Supply New

SPS-1050S SPS-1050S

Powerful switching power supply for amplifiers or the entireradio station.

The SPS-1050S is a switching power supply with a max. output current of 55A, manufactured by RM Italy. The continous load is 50A, which makes it particularly suitable for the supply of amplifiers or other large loads.

The SPS-1050S can either be set to a fixed output voltage of 13.5V or to a adjustable voltage of 9 to 15 Volt. This makes it useful for other consumers loads which require a different voltage, or to compensate voltage losses on long cables. Two backlit analog instruments show voltage and current at the same time, for an immediate control of the power supply. Safety measures against too high tempereature or excessive current as well as short circuit help to protect the power supply as well as the load. Weight only approx. 3 kg, size 185 × 113 × 285 mm.

Technical Data SPS-1050S
SPS-1050S
Input Voltage 230 - 240 / 110 VAC
Output Voltage 13.5V fixed or 9-15V adjustable
Protection short circuit, excess current, high temperature
Max. current 55A
Ripple ≤ 50mVpp
Dimensions 185 × 113 × 285 mm
Weight 2.9kg
Order No.
SPS-1050S Switching Power Supply 50A 199.00 € Buy now New
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MFJ-4103


Mini switching power supply, 13.8V/2.8A für FT-817 or VHF handheld radios. Size only 102 x 62 x 37mm, weight 300gr. Large input voltage range from 100 to 240V AC. Protection against overvoltage, overload and over temperature. DC cable with plug 2.1/5.5mm, with adaptor for FT-817. Input AC jack, removeable AC cable (Euro) included.

Order No.
MFJ-4103 59.80 € Buy now
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