Point One
In September 1945 the company released the first of the "Point One" series of amplifiers, so named because the total harmonic distortion was 0.1% at rated output. This represented a major leap forward in accepted standards for high-performance amplifiers (with 2% distortion generally considered acceptable at the time). This first "Point One" amplifier was known as the Type 15, and produced 15 watts output, at 0.1% distortion, using push-pull KT66 valves connected as triodes, with 26 dB feedback applied over four stages. The amplifier has a similar topology to the Williamson amplifier published in Wireless World in 1947.
In 1948, the original four-stage circuit was replaced with a three-stage design that was designated the TL/12. This amplifier had the same high performance at reduced cost, and it was responsible for establishing and securing the future of the company as a dominant player in the "hi-fi" boom of the 1950s and 60s.
Subsequent amplifiers from the company all used the same circuit topology as the TL/12, but took advantage of newer more efficient power valves and the so-called "ultra-linear" connection of the output stage to obtain higher power output with triode-like characteristics. These amplifiers included the TL/10, TL/25, TL/12-Plus, TL/25-Plus, TL/50-Plus, and the Stereo 20, Stereo 50 and Stereo 60.
Read more about this topic: Leak
Famous quotes containing the word point:
“All people who have reached the point of becoming nations tend to despise foreigners, but there is not much doubt that the English-speaking races are the worst offenders. One can see this from the fact that as soon as they become fully aware of any foreign race they invent an insulting nickname for it.”
—George Orwell (1903–1950)
“I laugh when I think that all of Rome made it a point not to pronounce Drusilla’s name. Because Rome was mistaken for all those years. Love is not enough for me, and I understood that then.... To love someone is to accept to grow old with her. An old Drusilla is far worse than a dead one.”
—Albert Camus (1913–1960)