A Complete Collection of Vintage Audio Circuit Diagrams (1970–1979).
Have you ever wanted to revisit the amplifier circuit you couldn’t build back then? Or incorporate a now-obsolete circuit design into your DIY project?
This digital collection compiles every single audio-related circuit diagram published in Radio and Experiment magazine (formerly known as MJ) from January 1970 to December 1979—a full decade's worth of 120 issues (excluding special editions).
While some circuits use components that are now difficult to find, and others have been phased out due to advancements in technology, this collection serves as a historical archive of audio innovation. It offers insights into the expertise of amplifier builders familiar with pre-war vacuum tubes and showcases the bold experiments of young engineers who tackled cutting-edge designs like four-channel stereo and DC amplifiers of the time.
Not only is this a nostalgic treasure trove for long-time audio enthusiasts, but it also serves as a source of inspiration for today’s researchers, carrying forward the wisdom of audio’s golden age.
This product contains approximately 500 circuit diagrams extracted from articles published between 1970 and 1979, compiled into a searchable PDF file. You can easily find the circuit you’re looking for by searching for article titles and keywords.
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※This product includes an English-language table of contents and introduction to make it more accessible for international users. However, please note that the circuit diagrams and main content remain in Japanese.
※This is a digital product.
※Once your purchase is complete, you will receive a download link for a ZIP file.
※The link will be sent to the email address provided at checkout.
※The USB edition is available exclusively through the MJ Product Store (Japan only).
➡https://mjnetshop.thebase.in/items/87911545
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You can view the table of contents here（PDF link）.
https://www.seibundo-shinkosha.net/mj/wp-content/uploads/2024/06/79444c52d717454f68380a5ae2611937-1.pdf