Stromberg-Carlson SR-406 (1957)
Reportedly priced around $249.95 in 1957, this mono tube receiver carried a premium tag for its time — a machine built when "receiver" was still a new word in hi-fi.
Overview
The Stromberg-Carlson SR-406 was reportedly introduced in 1957 as a mono tube receiver, part of a pivotal shift in home audio where integrated AM/FM tuners and amplifiers began to be marketed under the single term "receiver." At $249.95, it sat in the high-end bracket of its era — a serious investment for the discerning listener. While no technical specifications such as power output, frequency response, or input configuration have surfaced in available documentation, its identity as a four-valve, battery-operated superheterodyne unit suggests a design prioritizing signal clarity and portability over raw power. The use of vacuum tubes and superheterodyne circuitry points to a carefully engineered approach for the time, though the lack of surviving performance data leaves its sonic character to inference.
Owners report it as a rare find today, with one restored example listed in "Excellent (Used)" condition and assigned an 8/10 rating after a full 30-point service check, including a refinished cabinet and installation of a new-old-stock faceplate. Its possible presence in niche forums like Audio Asylum and Audiokarma — where users have posted about completing restorations or seeking help with repairs — suggests a small but active interest among tube enthusiasts. The mention of a ground loop hum issue requiring resistor substitution in place of tubes hints at the kind of idiosyncratic troubleshooting that comes with maintaining vintage gear, but no widespread failure patterns or service advisories have been documented.
Historical Context
The SR-406 was one of the first models to be officially called a "receiver," marking a turning point in how audio components were packaged and sold. Prior to this era, tuners, preamps, and power amps were typically separate units; the integration into a single chassis was a significant convenience. According to a 1971 issue of *High-Fidelity* magazine, almost all early receivers of this type included both AM and FM tuning stages, though it has not been explicitly confirmed whether the SR-406 followed that standard. Its 1957 release places it at the dawn of this category, making it a historically notable piece despite the absence of detailed technical records.
Collectibility & Value
No current market prices or valuation benchmarks are available in the documentation, though the existence of a restored unit with detailed service records suggests some level of restoration activity. An original Sams Photofact manual for the SR-406 is known to have been listed for sale, indicating that technical documentation is scarce enough to be commodified. The lack of data on spare parts availability, common failures, or service trends means that ownership remains a niche pursuit, likely limited to specialists with access to vintage test equipment and tube expertise.
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