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Power supply amateur radio

Seeing one in action at our recent club contest station inspired me to dust it off and put it to work. At one end the power supplies are fitted with a regular IEC power socket. You must take every precaution when working on this device. The voltages are lethal and you need to be confident in your workshop and soldering skills. Between these two pairs of blade contacts are 12 protruding pins in four rows of three.
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Amateur Power Supplies

Just edit this element to add your own HTML. All rights reserved. I just noticed an error in the circuit diagram when I posted it. The regulator is designated an LMT. It should say LM No big thing as far as the circuit itself goes, either regulator will work with this circuit, but in the interest of accuracy, the unit in the variable PS is actually an LM which gives it a little more headroom in amperage. This is the back view of the variable power supply.
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For the physical construct I used a cut-down computer enclosure and fitted re-calibrated voltage and current meters, plus a 12v cooling fan also from donor PC Overall dimensions are 15cm H 25cm W 19cm D. Obtain 2 or more power supply units from disgarded PC tower type computers. These are self contained in a metal enclosure. The circuit boards should be removed from their containment. Essentially the "trick" is to reconfigure things to deliver
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All power supply's share a common construction. Rather than this being a review of a particular Power Supply, this is more a comparison between various types and models available to assist in making the proper purchasing decision. I am not going into the electronics inside the box, only what to expect and the options available. For Amateur use a Regulated Power supply is recommended;. Mid-Power Linear Supply.
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