Omega ST-55
Little is documented about the Omega ST-55. The most concrete record that survives is a tuner listing in HI-Fi-Stereo-Buyers (1964, p.61). It shows two ways to buy the ST-55. One was a kit with pre-aligned multiplex circuitry for $109.95. The other was a semi-kit with the multiplex, RF, IF, and discriminator circuits already aligned, for $139.95.
The same listing gives a signal-strength/station-tuning indicator, frequency response of 20-20,000 cps, and usable sensitivity better than 2.5 µV. Outputs are 2 volts on FM and 1 volt on AM at 100% modulation. The tube lineup is two 12AT7s, a 6BE6, a 6BA6, two 6AU6s, and a 6AL5, plus one selenium rectifier. The tuner measured roughly 10¾ inches wide by 4 inches high. The depth isn't preserved. Beyond this listing, the ST-55 appears to have gone largely unnoticed.
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