Dean Huster
Well-Known Member
OK, trivia nuts. For many years, McGraw-Hill published an industrial magazine titled Electronics. During the 1970s and other years, they had a department similar to Penton's Electronic Design's "Ideas for Design" where readers submit cute design ideas to be shared with others. I'm hunting for a specific such submission that was published sometime between about 1970 and 1972, most likely 1971. The reader submitted an audio power amplifier design that involved about 4 small-signal transistors and a pair of 2N3055 power transistors for the output. It used a clever circuit to develop the differential signal required by the output using a 741 (hey, this was around 1971, OK?) with the output pin connected to a do-nothing resistive load -- the two output signals were derived from the two power supply pins which were in series with a low-value resistor which was then connected to a decoupled power supply. This thing had pretty impressive specs with around 120W rms output, DC to at least 200KHz and low distortion. Overall, the circuit was relatively simple. I'd like to find this article.
I can't find a spot on the Internet having a database of Electronics articles. One possibility is to go to a large technical library such as that at the University of Missouri - Rolla (their engineering campus) and see if they have ancient bound copies. Another is to see if any of you have a collection and could find the article and copy it for me. Another is to see if Penton Publishing, who bought the title from McGraw-Hill can be of any help.
Any ideas out there?
I can't find a spot on the Internet having a database of Electronics articles. One possibility is to go to a large technical library such as that at the University of Missouri - Rolla (their engineering campus) and see if they have ancient bound copies. Another is to see if any of you have a collection and could find the article and copy it for me. Another is to see if Penton Publishing, who bought the title from McGraw-Hill can be of any help.
Any ideas out there?