About: 1L6

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The 1L6 is a 7 pin miniature vacuum tube of the pentagrid converter type. It was developed in the United States by Sylvania. It is very similar electrically to its predecessors, the Loktal-based 1LA6 and 1LC6. Released in 1949 for the Zenith Trans-Oceanic shortwave portable radio, this tube was in commercial production until the early 1960s . The closest European analog to the 1L6 is the DK92.

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  • The 1L6 is a 7 pin miniature vacuum tube of the pentagrid converter type. It was developed in the United States by Sylvania. It is very similar electrically to its predecessors, the Loktal-based 1LA6 and 1LC6. Released in 1949 for the Zenith Trans-Oceanic shortwave portable radio, this tube was in commercial production until the early 1960s . The 1L6 was to be a specialty tube, produced in small quantities by very few manufacturers, mostly Sylvania for use by just a few manufacturers of shortwave portables, such as Zenith - in their Trans-Oceanics - and its short-lived rivals, such as the Hallicrafters TW-1000 and the RCA Strat-O-World and very few others. In fact, Zenith, Crosley and more than a few others used it in many radios. 1L6 based multi-band radios were made by Crosley, Airline (Montgomery Ward house-brand), Silvertone (Sears house brand), Hallicrafters, FADA, and several others. When the US military commissioned two versions of the Trans-Oceanics, they stockpiled 1L6s in the uncounted thousands, some of which still show up at surplus sales. It was offered to Zenith by Sylvania in place of the larger 1LA6 - for which Zenith made production line changes as the first Miniature-Tube T/O was starting production. The original G500 chassis was punched for a Locktal socket, Zenith changed the phenolic wafer socket to accommodate the smaller tube. NOTE: a 1LA6 (or a 1LC6) will work as a near drop-in replacement for the 1L6 with the use of an adapter socket. The closest European analog to the 1L6 is the DK92. (en)
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  • The 1L6 is a 7 pin miniature vacuum tube of the pentagrid converter type. It was developed in the United States by Sylvania. It is very similar electrically to its predecessors, the Loktal-based 1LA6 and 1LC6. Released in 1949 for the Zenith Trans-Oceanic shortwave portable radio, this tube was in commercial production until the early 1960s . The closest European analog to the 1L6 is the DK92. (en)
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  • 1L6 (en)
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