Current feedback type A class power amplifier production ----- Class A Power Amplifier

Current feedback type A class power amplifier production, Class a Power Amplifier Keywords: current feedback type A class power amplifier production This article is from http://www.cooltune.ch/projects/megalith01.htm Introduction My first set of electronics starting in 1979 as an experiment based on a design Published in the French Magazine "L'AudioPhile No. 10" by jean hiraga. Modified Version of Hiraga's Class A Amplifier Although a Class A triode push-pull or single ended tube amplifier might have been the better choice in those days (and possibly still today), I was highly attracted by the new developed Hitachi FET-Devices. As owner of the high efficient Onken- Mahul System, most of the time 1 watt with peaks to 8 watt were absolutely sufficient. So, I decided to simplify the modified version of Hiraga? s Class A Amplifier once more (reduction of open-loop gain and use of less discrete components) And settled for a class a operation of 8 watt. FET Amplifier No. 1Power Supply for FET Amplifier No. 1This FET Power Amplifier No. 1 was produced in 1980 for several music enthusiast and colleagues. Today, after 23 years some of these power amplifiers are still in use and according to the owners they perform Much Better Than Many High Rated Commercial Amplifier. Design Considances Encouraged by the friendly, direct and immediate sound of the FET Amplifier No.1 and repeated requests from some of the owners to design an improved successor, I finally decided in 2000 to start the task. But, where should the existing design be improved? Suspecting that the ear compensates for amplifier distortion, when it is simple in nature over the entire power range, but does not like distortion of high harmonic order that is constantly changing with the music, it became immediately clear I should primarily improve the power supply. ................................... ...Clavators. Other AREAS of Improvements Are A Further Reduction In Components and The Use of Morelinear Discrete Semiconductors. Megalith - FET Power Amplifier NO. 2 Along with The Effort of Improving The Existing Fet Power Amplifier No.1, i considered Other Topologies Which May Have a Similar Performance. Attachment: Related Circuit Diagram, PCB and Component List .rar

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