This comprehensive service and repair manual is specifically designed for the Tandberg 821, 822, 823, and 824 reel-to-reel tape recorders, covering models manufactured in 1965. It contains detailed wiring and schematic diagrams, providing an in-depth understanding of the internal workings of these machines. Created by the manufacturer, this manual is an invaluable resource for technicians and repair professionals. It was originally used by dealership mechanics to diagnose and fix issues with these tape recorders. Whether you are a seasoned technician or a hobbyist looking to restore a classic Tandberg, this manual provides essential information to help you understand the intricacies of these legendary machines and perform repairs effectively.

The Tandberg 821, 822, 823, and 824 series of reel-to-reel tape recorders, introduced in 1965, represent a significant chapter in the history of high-fidelity audio recording. These machines, renowned for their exceptional audio fidelity and robust construction, became popular among professional studios, broadcasters, and discerning audiophiles. They were designed and manufactured by Tandberg, a Norwegian company that had established a strong reputation for its innovative audio technology, particularly in the field of professional broadcast equipment. The 820 series offered a range of features that catered to diverse recording needs. The 821 was a basic model, while the 822 featured an extended frequency response and higher tape speed options. The 823 incorporated additional features like a built-in VU meter and a remote control jack. The top-of-the-line 824 model boasted a comprehensive set of professional features, including a built-in Dolby noise reduction system, a 10-inch reel capacity, and a variety of tape speed options. These machines were constructed with meticulous attention to detail, employing high-quality components and robust mechanical engineering. The 820 series utilized a three-motor design, with separate motors for tape transport, capstan drive, and reel drive, ensuring smooth and precise tape movement. The tape path was designed to minimize tape wear and optimize audio performance. The machines featured a number of innovative features, including a unique "floating" head design that minimized tape flutter and wow, and a sophisticated electronic circuitry that minimized distortion and noise. The 820 series became a mainstay in professional studios and broadcast facilities, contributing to the recording and production of countless albums, radio programs, and television shows. They were also widely adopted by audio enthusiasts for their ability to capture and reproduce music with exceptional clarity and detail. While these machines are no longer in production, they remain highly sought after by collectors and audiophiles who appreciate their superior audio performance and enduring legacy.