Calculate the ac power delivered to the 8-Ω speaker for the circuit shown above. The circuit component values result in a dc base current of 6 mA, and the input signal (Vi) results in a peak base ...

If you’ve ever wondered why something like a radio or a TV could command a hefty fraction of a family’s yearly income back in the day, a likely culprit is the collection of power transformers needed ...

FITCHBURG — Unitil replaced a 10,000-pound electrical transformer in front of City Hall Wednesday. The transformer had sat under the sidewalk since 1985, said electric line supervisor Mark Frappier, ...

The appearance of a transformerless transistorised five-Watt amplifier on the Lowther stand was a pleasant surprise. So, 62 years ago, started a report on the international audio festival and fair at ...

Sometimes, a Design Ideas submission doesn’t quite fit with the theme of that EDN section, yet still promises interest for our readers (you). Such is the case with a DC Transformer design that reader ...