The Hammarlund Super Pro was an American-made radio communications receiver. == History == In March 1936, the Hammarlund Manufacturing Company initiated the first of the famous "Super-Pro" line, the SP-10 receiver, followed in January 1937 by the SP-100.
The Hammarlund Super Pro was an American-made radio communications receiver. == History == In March 1936, the Hammarlund Manufacturing Company initiated the first of the famous "Super-Pro" line, the SP-10 receiver, followed in January 1937 by the SP-100.
Source: Wikipedia "Hammarlund Super Pro" · CC BY-SA 4.0
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