Stromberg-Carlson SR-406 (1957)
Reportedly priced around $249.95 in 1957, this mono tube receiver carried a premium tag for its time. It came out 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. Around then, integrated AM/FM tuners and amplifiers started being sold under the single term "receiver." At $249.95, it sat in the high-end bracket of its era. No technical specifications such as power output, frequency response, or input configuration have surfaced in available documentation. It is a four-valve, battery-operated superheterodyne unit, which suggests a design aimed at 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 with no surviving performance data, its sound is left to inference.
Owners report it as a rare find today. One restored example is listed in "Excellent (Used)" condition and rated 8/10 after a full 30-point service check, including a refinished cabinet and a new-old-stock faceplate. It may show up in niche forums like Audio Asylum and Audiokarma, where users have posted about finishing restorations or asking for help with repairs. That suggests a small but active interest among tube enthusiasts. One mention of a ground loop hum issue called for substituting resistors in place of tubes, the kind of idiosyncratic troubleshooting that comes with vintage gear. 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." Before this era, tuners, preamps, and power amps were typically separate units, so putting them in a single chassis was a real convenience. According to a 1971 issue of *High-Fidelity* magazine, almost all early receivers of this type included both AM and FM tuning stages. It has not been explicitly confirmed whether the SR-406 followed that standard. Its 1957 release places it at the start of this category, though detailed technical records are absent.
Collectibility & Value
No current market prices or valuation benchmarks are available in the documentation. A restored unit with detailed service records does exist. An original Sams Photofact manual for the SR-406 is known to have been listed for sale, which suggests technical documentation is scarce. Nothing is known about spare parts availability, common failures, or service trends. Ownership likely stays limited to specialists with vintage test equipment and tube expertise.
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