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  • Author Author: tariq.ahmad
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Teardown of a 1972 Sanyo G-2607 Portable Briefcase Stereo System -- The Electronics Inside-79

Most people can remember or know what a boom box is (or was). But what did it's grandfather look like? Was it a revolutionary product, or just a few bits bolted together in a box? In this video, Dave takes us on a journey into the inner workings of a vintage Sanyo Portable Stereo Solid State Music Center from 1972. This portable music center was an all-in-one solution, featuring stereo speakers, a turntable, a stereo tuner, and a cassette deck. While it may seem a bit outdated by today's standards, Dave highlights the uniqueness and potential of such a device. 

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One of the intriguing aspects is its battery operation, requiring a hefty 45 pounds of batteries to keep it running. Dave also points out the switchable voltage feature, which was quite specific at the time, considering the standardization of voltages in the EU. 

The video explores the device's analog features, such as the analog gauge for battery and mic levels, and the retractable antenna – a feature seldom seen in modern electronics.  

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Dave dissects the device to discover its internal components and connections. He explores how this portable music center combines off-the-shelf components, raising questions about its integration and functionality. Dave also investigates the turntable, which appears to be direct drive, and the cassette deck with its interesting mechanics. 

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One noteworthy observation is that, despite the "stereo" labeling, the record player turns out to be mono. Dave goes on to speculate about potential modern upgrades, like Bluetooth connectivity or an auxiliary input, to make it relevant for today's music enthusiasts. 

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As he delves deeper into the internals, Dave encounters various PCBs and modules, questioning their origins and functions. He uncovers the amplifier and preamp circuits and explores how signals are routed within the device. 

In the end, Dave ponders whether the reuse of standard components in this vintage music center is a testament to their durability and adaptability or a sign of repackaging. He invites viewers to share their ideas for modernizing this device for the 21st century and looks forward to potential future projects. 

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