Now fast-forward a half-century or more, and affordable, good-quality power transformers ... on budget-friendly transformers, and even shows off a nice three-tube audio amp using them.

one of the larger and more powerful amplifiers that Yamaha offers. It has a 625VA Toroidal power transformer, which grants it a rated output of 20 Hz-20 kHz and produces 90 W ＋ 90 W at 8 ohms or ...

It's a midsized amplifier that balances price and performance nicely. It runs on a custom power transformer with 12,000 µF block capacitors and extruded aluminum heat sinks, giving it a rated ...

two ultralinear output transformers and one power transformer. Unlike its previous amplifiers, the Dynaco ST-70 was a ...