EMI

Charger Radiated Emissions

I usually have a respectable HF noise floor at home, for which I count myself lucky in today’s sea of cheaply made switching power supplies. However, we were expecting some severe winter weather a couple of weeks ago (it never materialized, but that’s beside the point) and I noticed that my noise floor had gone […]

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Switch-Mode vs Linear Supplies

Amateur radio transceivers demand power supplies which have a large current capacity. The average 100 watt radio transceiver requires over 20 Amps when in transmit mode. Overview A linear power supply uses a large heavy transformer to step down the input high voltage AC to a level close to the desired output. From there, the […]

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