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Hallicrafters SX-28
The Hallicrafters SX-28 "Super Skyrider" was an American shortwave communications receiver produced between 1940 and 1946 that saw wide use by amateur radio, government and military services.
==History==
In July 1940, the Hallicrafters Company announced the SX-28 "Super Skyrider", the result of a development effort by 12 staff engineers and analysis of more than 600 reports that included input from U.S. government engineers, commercial users, and amateur radio operators. The SX-28's distinctive art deco styling was considered sleek and strikingly modern in 1940. The radio frequency coverage was 550 kHz (0.55 MHz) to 43 MHz in six bands. The SX-28 included an Amplified AVC, a Lamb Noise Silencer, Calibrated bandspread, and Push-Pull audio output. The SX-28 was known for its "high fidelity" audio together with high sensitivity, stability and selectivity, and good purchase value.〔http://www.antiqueradio.org/halli12.htm, Phil Nelson's Old Radios〕〔http://www.radioblvd.com/SX28Notes.html Western Historic Radio Museum, ''The Hallicrafters SX-28, A pre-war masterpiece''〕
The SX-28 saw use by various branches of U.S. and allied military and signals intelligence agencies during World War II. SX-28 and Hallicrafters S-27 and S-36 receivers were often rack mounted in British government listening posts and secret listening stations for monitoring German radar and communications during the war such as Beaumanor Hall in the English Midlands where German and Italian encrypted radio messages were sent to Bletchley Park for decoding.〔http://www.leics.gov.uk/beaumanor_park_y_station Beaumanor Park Education Centre〕 A number of the receivers were sent to Russia as a part of the Lend Lease Act, subsequently modified to accommodate Russian tubes.〔http://www.dxing.com/rx/sx25.htm DXing.com〕〔http://oak.cats.ohiou.edu/~postr/bapix/SX28.html Boatanchor Pix〕
Hallicrafters published that 50,000 SX-28 and SX-28A's had been built by the end of its production run in 1946, however the serial numbers appear to indicate a production figure of half, approximately 27,500 receivers.〔http://www.radioblvd.com/Pre-WWII%20Ham%20Gear.htm Western Historic Radio Museum, Pre-WWII Ham Gear〕 Many of the SX-28/28A's that exist today are in the hands of vintage amateur radio collectors and amateur radio operators.
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