Douglas M. Perham: A Short Biography

Douglas McDonald Perham (1885–1967) was a self-taught radio engineer, machinist, inventor, and an avid collector whose life intersected with the pivotal moments of the wireless revolution. Born on May 22, 1885, in Duarte, California, Perham grew up in a time when the world of communication was undergoing profound changes, moving from wired telegraphy and telephony to the era of wireless communication. Though often overlooked in the official histories of electronics, Perham was deeply involved in some of the most transformative developments of the 20th century.

Perham's fascination with electronics began in his teenage years, when he lived in Palo Alto, California. The region, which would later become synonymous with technological innovation, was already a hotbed of experimentation and invention in wireless communication at the turn of the century. Young Douglas taught himself the fundamentals of radio engineering and wireless transmission through trial, error, and unrelenting curiosity. He also became an early amateur (ham) radio operator, joining the ranks of other passionate individuals who were experimenting with the new medium of wireless communication.

At the dawn of his career, Perham found work with the Federal Telegraph Company (FTC), one of the pioneering firms in wireless communication. FTC played a critical role in developing arc transmitters capable of long-distance communication, a technology that revolutionized maritime and military communication. Perham's involvement with FTC and its groundbreaking work laid the foundation for his lifelong career in electronics. Over the decades, he would lend his skills to many prominent companies, including Heintz & Kaufman, Dalmo-Victor, Ampex, and Varian Associates, all of which played key roles in California's burgeoning electronics industry.

While Perham's professional achievements were significant, he remained in the background, rarely seeking personal recognition. He later reflected to his wife, Connie, that his lack of public acclaim allowed him to remain uninvolved in the personality clashes and rivalries that often defined the industry's high-profile figures. This humility enabled him to focus on his work, unencumbered by the ego-driven conflicts that frequently arose among inventors, engineers, and businessmen.

Perham was not only a skilled craftsman and engineer but also a lifelong collector. His collection of electronics apparatus, photographs, and publications chronicled the rapid evolution of communication technology, from early wireless transmission systems to the advent of commercial radio broadcasting and the development of advanced technologies like the klystron tube. Many of the individuals whose work shaped the electronics industry, such as Lee de Forest, Charles “Doc” Herrold, Ralph Heintz, Leonard Fuller, and Russell Varian, were friends and acquaintances of Perham. They often contributed to his collection, recognizing his dedication to preserving the history of their field.

The breadth of Perham's collection culminated in the creation of the "Cavalcade of Electronics," a series of exhibits and a private museum that he curated during the 1950s and 1960s. These exhibits showcased the evolution of electronics and wireless communication, offering visitors a tangible connection to the technologies that had transformed the world. Perham's ability to contextualize and celebrate these advancements demonstrated his deep appreciation for the scientific and engineering achievements of his peers.

Despite his many contributions, little has been written about Perham, and much of what exists is riddled with inaccuracies or unsubstantiated rumors. He seldom corrected these misconceptions, content to let his work speak for itself. His humility and preference for operating behind the scenes have, unfortunately, led to his being overshadowed by more prominent figures in the industry's history. Yet his legacy endures, particularly through the Perham Collection of Early Electronics, which is now preserved at History San José. This collection remains an invaluable resource for understanding the early days of wireless communication and the individuals who shaped its development.

Douglas McDonald Perham passed away on January 13, 1967, in Palo Alto, California. Though he did not achieve the widespread recognition of some of his contemporaries, his contributions to the fields of radio and electronics were substantial. Through his work as an engineer, his role in fostering the growth of the industry, and his efforts to preserve its history, Perham helped to shape the technological landscape of the 20th century. His life serves as a testament to the ingenuity, curiosity, and dedication of the many unsung heroes who have driven human progress.

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AI Technical Trustability Update

While working on an update to my RF Cafe Espresso Engineering Workbook project to add a couple calculators about FM sidebands (available soon). The good news is that AI provided excellent VBA code to generate a set of Bessel function plots. The bad news is when I asked for a table showing at which modulation indices sidebands 0 (carrier) through 5 vanish, none of the agents got it right. Some were really bad. The AI agents typically explain their reason and method correctly, then go on to produces bad results. Even after pointing out errors, subsequent results are still wrong. I do a lot of AI work and see this often, even with subscribing to professional versions. I ultimately generated the table myself. There is going to be a lot of inaccurate information out there based on unverified AI queries, so beware.