Shortwave radio receiver (English Wikipedia)

antiqueradio.org: Zenith Model 1000 TransOceanic Radio Quote: "... Model 1000 was the first transistor-powered TransOceanic radio. Introduced in 1957, when transistors were still novel, it didn't instantly replace its tube-powered counterpart ..."

books.google.com

Clinton B. DeSoto (1936). Two Hundred Meters and Down: The Story of Amateur Radio. American Radio Relay League.
Jerome S. Berg (20 September 2013). The Early Shortwave Stations: A Broadcasting History Through 1945. McFarland. pp. 6–. ISBN 978-0-7864-7411-0.
Jerome S. Berg (1999). On the Short Waves, 1923–1945: Broadcast Listening in the Pioneer Days of Radio. McFarland. pp. 52–. ISBN 978-0-7864-0506-0.
Christopher H. Sterling; Cary O'Dell (12 April 2010). The Concise Encyclopedia of American Radio. Routledge. pp. 2271–. ISBN 978-1-135-17683-9.
Lawrence Magne (19 October 2004). Passport to World Band Radio. International Broadcasting Services. ISBN 978-0-914941-85-9.
Ulrich L. Rohde; Jerry C. Whitaker; T. T. Nelson Bucher (1997). Communications Receivers: Principles and Design. McGraw-Hill. ISBN 978-0-07-053608-1.
Joe Pritchard (4 December 2015). Newnes Short Wave Listening Handbook. Elsevier. pp. 161–. ISBN 978-1-4831-0447-8.
H. Ward Silver (1 June 2006). The ARRL Ham Radio License Manual: All You Need to Become an Amateur Radio Operator. Technician. Level 1. American Radio Relay League. pp. 3–. ISBN 978-0-87259-963-5. Retrieved 7 May 2013.
Ziff Davis, Inc. (19 January 1999). PC Mag. Ziff Davis, Inc. pp. 56–. ISSN 0888-8507. Retrieved 7 May 2013.

cryptomuseum.com: Zenith 1000-D Portable short-wave receiver Quote: "... The Royal 1000 Trans-Oceanic was a portable solid-state LW, MW, and SW receiver (150 kHz – 22 MHz), also known as a world receiver, manufactured by Zenith in Chicago (Illinois, USA) and introduced in 1957 ..."

qsl.net, k7jar: newsletter_201408.pdf Quote: "... Screen star Myrna Loy and the Zenith model 5G401 portable radio for 1940. The chassis of the 5G401 formed the basis for the early shortwave portable prototypes which led to the Trans-Oceanic Clipper ...", backup

Rogers, Henry. "Floor Model Radios and Radio-Phonographs 1929 to 1939". Radio Boulevard. Western Historic Radio Museum. Retrieved 28 December 2017.
Rogers, Henry. "HAMMARLUND MANUFACTURING CO.,INC. "The Incredible Pre-war 'Super-Pro' Receivers"". Radio Boulevard. Western Historic Radio Museum. Western Historic Radio Museum. Retrieved 6 February 2018.

radiomuseum.org: Magnavox model AW-100 Quote: "... The Magnavox model AW-100 is one of the first transistor multiband consumer radios if not the first - before the well known Zenith 1000. It has broadcast and 3 SW-bands ..."
radiomuseum.org: Trans-Oceanic Royal 1000 Quote: "... There is an ad in "The National Geographic Magazine" 1957, December and we believe the first Trans-Oceanic 1000 was introduced in November 1957 ..."
radiomuseum.org: Trans-World Portable T-9 Code 126 Quote: "... Year: 1958–1962 ..."
radiomuseum.org: Antennen-Diversity-Gerät Abl.127

shortwaveradio.ch: Comet Pro Quote: "... Im Jahre 1931 brachte Hammarlung mit dem Modell "Comet" einen der ersten Superhet - Kommunikationsempfänger heraus ...", backup

shortwaveradio.ch: Comet Pro Quote: "... Im Jahre 1931 brachte Hammarlung mit dem Modell "Comet" einen der ersten Superhet - Kommunikationsempfänger heraus ...", backup
qsl.net, k7jar: newsletter_201408.pdf Quote: "... Screen star Myrna Loy and the Zenith model 5G401 portable radio for 1940. The chassis of the 5G401 formed the basis for the early shortwave portable prototypes which led to the Trans-Oceanic Clipper ...", backup
Mar 27, 2015, wshu.org: Zenith Trans-Oceanic, The "Royalty of Radios" Quote: "... With the development of tubes in the late 1930s to support portability, McDonald came up with the concept of a portable shortwave radio that he could use while at sea on his yacht ... By this time, the popularity of international shortwave broadcasts was growing rapidly ... Starting in 1939, and continuing through the remainder of that year, no less than 20 prototypes were submitted to CEO McDonald for his approval ...", backup

Ziff Davis, Inc. (19 January 1999). PC Mag. Ziff Davis, Inc. pp. 56–. ISSN 0888-8507. Retrieved 7 May 2013.

Mar 27, 2015, wshu.org: Zenith Trans-Oceanic, The "Royalty of Radios" Quote: "... With the development of tubes in the late 1930s to support portability, McDonald came up with the concept of a portable shortwave radio that he could use while at sea on his yacht ... By this time, the popularity of international shortwave broadcasts was growing rapidly ... Starting in 1939, and continuing through the remainder of that year, no less than 20 prototypes were submitted to CEO McDonald for his approval ...", backup