This rugged power supply is based on the popular LM338 3-pin voltage regulator. The LM338 is capable of supplying 5 A over an output voltage range of 1.2 V to 32 V with all standard protections like ...

The article that appeared in this magazine and in EDN last year about ham radio in the 21st century generated a lot of interest and a lot of questions about various aspects of the hobby. This article ...

As popular as the venerable Yaesu FT-817 transceiver might be with amateur radio operators, it’s not without its flaws, particularly in the user interface department. [Andy (G7UHN)] is painfully ...

'kv4p HT' is an amateur radio transceiver that can be used in combination with an Android smartphone, and can send and receive voice and text messages. kv4p HT is developed with all open source ...

Tom Dawson squeezes into a chair jammed between five computer screens and shelves of gadgets in a cramped room of his house, turns on a ham radio transceiver and searches the airwaves for company. He ...

Ham radio, especially the HF bands, can be intimidating for aspiring operators, many being put off by the cost of equipment. The transceiver itself is only part of the equation and proper test and ...

Mobile phones have made communication easier for everyone especially if your friends and family are living in remote rural areas. But what if you aren't able to reach your family living in these ...