The Williamson amplifier was published in 1947 as an article in Wireless World ... claimed to be the most popular tube amp ever made with over 300,000 produced. MC275 stereo tube amp, 75W per channel ...

It’s not every day we see the results of someone putting their own spin on a vintage tube ... the McIntosh MC275 Power Amp, and the Dynaco ST35. The Dynaco was a more budget-friendly amplifier ...