A rectangular black metal housing enclosing a transformer, two contacts either side. Nameplate reads: “Type R-14 Ratio 3 to 1 / All-America / Trade Mark / Audio Frequency Transformer/ Guarantee No.

Subscribe to BizTimes Daily – Local news about the people, companies and issues that impact business in Milwaukee and Southeast Wisconsin. Pioneer Power Solutions Inc. has agreed to sell its ...

Having built a number of vacuum tube output transformer-less (OTL) amplifiers in recent years, it seemed as though it might be a good idea to try combining older with newer technology and using both ...

The lab power supply is an essential part of any respectable electronics workbench. However, the cost of buying a unit that has all the features required can be eye-wateringly high for such a ...

An explosion, a fireball and then darkness: Heathrow Airport uses as much energy as a small city, and when a major fire at a substation caused the power to fail late Thursday, the world learned how ...