Search Digital Records

• Subject > Antennas (Electronics) (remove)

Limit your search

• Still Image (10)

• New York (N.Y.) (1)
• New York (State) (1)
• United States (1)

• photographic prints (10)
• composite photographs (1)

• Copyright undetermined (9)
• In copyright (1)

• Antennas (Electronics) (10)
• Lear Developments (8)
• Radio in aeronautics (7)
• Aids to air navigation (5)
• Learadio (5)
• Lear, William P. (William Powell), 1902-1978 (1)
• Vehicles (1)

10 results

[Loop antenna] (Item)

Photograph of a loop antenna, circa 1931-1939.

[Model L Lear-o-Scope and loop antenna] (Item)

Photograph of a Model L Lear-o-Scope and loop antenna, circa 1936-1939. The verso inscription, which was written by William P. Lear, describes the device and its development.Inscription on verso: "Note left crank changed bands and moved mash on dial -- Right crank for tuning -- moved freq. dial 200 to 410 KC -- 530 to 1530 KC. Also first time tuning meter used. High Z loop with short tuning coil…

[Learadio Model R-3 aircraft receiver, antenna, and peripheral components] (Item)

Photograph of a Learadio Model R-3 aircraft receiver, shielded loop antenna, and peripheral components, circa 1931-1939. The caption describes the device's development.Typed caption on verso: "P. This loop was metallized in an attempt to shield it, but it was found that the metallizing reduced the 'Q' of the loop so much that it was completely impractical. It was also used in conjunction with an…

[Lear Developments loop antenna] (Item)

Photograph of a Lear Developments loop antenna with a transparent plastic shield, circa 1935-1939.Inscription on verso: "Loop antenna. Winner of national plastics award in 1935. First stream lined housing for loop antennae."Stamped on verso: "Please credit Hans Groenhoff."

[Men working with Lear devices and a loop antenna] (Item)

Photograph of three men working with Lear devices and a loop antenna, circa 1931-1939.

[Learadio loop antenna] (Item)

Composite photograph of a Learadio loop antenna, showing two views of the internal components, circa 1931-1939. The caption describes the antenna's development and specifications.Typed caption on verso: "H. Shows an early attempt to tune the loop antenna at the antenna, itself, to eliminate the losses attendant to a long loop line. Also you will note that there were two loops in the fore and aft…

[Learadio antenna reel] (Item)

Photograph of a Learadio antenna reel, circa 1939.Inscription: "Complete manual operated ant. reel with spring take-up fair-lead and [illegible]. / 1939."

[Learadio loop antenna] (Item)

Photograph of a Learadio loop antenna, circa 1931-1939.

[Loop antenna in workshop] (Item)

Photograph of a shielded loop antenna in a workshop, circa 1931-1939.

[William P. Lear with Lear-o-Scope equipped automobile] (Item)

Photograph of William P. Lear with his Lear-o-Scope-equipped Plymouth automobile, New York City, New York, circa 1935. A loop antenna is mounted to the roof of the car. Inscription: "1935. 121 W 17 St NCY. WPL with first Lear-o-Scope." Stamped on verso: "Conrad Studios. New York." Inscription on verso of duplicate photo: "Bill Lear standing in front of his Plymouth parked across the street from…