How we change voltage on a transformer

Former transformer designer here; just to nitpick a tiny bit – there are 3 types of tap changers: OLTC – On load tap changer (Also called LTC): Can change taps on load NLTC – No load tap changer: Can only change taps while there is no load but still energized DETC – Deenergized tap changer: … Read more

Mainstream explanation of History of Power Grid, 60 Hz vs 50 Hz, 110 VAC vs 220 VAC

Part 1 voltages Part 2 frequencies     The history of the power grid, including the development of standard frequencies like 60 Hz and 50 Hz, as well as voltage standards like 110 VAC and 220 VAC, is closely tied to the evolution of electricity generation and distribution systems. Here’s a mainstream explanation … Read more

Universal Audio Output Transformer

Over 90 tube amp topologies examined, further evidence of how audio output transformers inescapably present limitations and compromises. Menno Van der Veen presented at 118th AES a paper detailing a universal audio output transformer system that “includes all possible variations in topologies. The system contains 90 variations (at least) and some of them have never … Read more