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51S-1
The 51S-1 covers 0 -30 MHz in 30 bands, providing a mechanical readout accurate to less than 200 Hz when in calibration. This performance caused the government to purchase large numbers of these receivers for the military and agency use. Commercial users such as maritime operators also enjoyed the stability, quality and reliability inherent in this and other Collins radios, and this receiver was built well into the 1970’s. The 51S-1 pictured could have been another spook radio, but alas was destined for more mundane tasks. In fact, it rarely tuned much, serving a southwestern public utility as a means to monitor the atomic clock-based shortwave time signals of National Bureau of Standards radio station WWV on 5, 10, 15 and 20 MHz. Happily, in retirement it’s had a bit more fun, such as monitoring the HF signals of Burt Rutan’s Voyager on its record breaking non-stop around the world flight. |
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Make something good happen.
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As vintage receivers become more complex and costly, you become aware that they are really being built for an expensive government market, with only the most fortunate radio enthusiasts able to pony-up the cash required to join in the fun. The Collins 51S-1 is one such radio. |
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