Loose-coupled, crystal wireless receiving set
date: label: date made
content: 1916
label: associated date
content: 1916
notes: label: Description (Brief)
content: Donor reported: "This wireless receiving set is known as a loose-coupler variety. It used the detector which is a galena type. The switch taps were made numerous so as to make very fine adjustments and selective tuning possible. There are also make-break switches which were used to cut down the dead-end effect from unused portions of inductance. This tuning coil would cover easily all stations operating around the years of 1915 following.
label: Description (Brief)
content: The set was used in Massachusetts at the amateur experimental station licensed in the name of H.H. Lippincott and the station call letters assigned by the government were 1BW. The location of the station was West Chelmsford, Mass. The transmitter at the time was a one half kilowatt instrument. The spark gap most of the time was a plain open gap variety. The antenna was built to operate around 200 meters---a T flat top variety. Exceptional results at times in both reception and transmission were obtained. Beside the licensed operator, H.H. Lippincott, there were two other operators. Mrs A.C. Snow who, at sixty-odd years patiently learned the code and became a very ardent enthusiast at this station. Mrs L.L. Snow, her daughter also operated the station.
label: Description (Brief)
content: All amateur stations had to dismantle with the beginning of the war. This loose-coupler was placed in the attic of the home of Mrs. A.C.Snow, West Chelmsford, Mass., and I had not seen it till a week or so before I wrote you when Miss L.L. Snow sent it to me. I assure you it dates back to before the war just as it is, tap switch points and all. In fact I seem to remember finding it not difficult to get such switch points during my days at college around 1912. I used the receiver sometime before I procured the license of 1BW, taking the examination for same at the Custom House Tower, Boston, Mass, as I remember it."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from H. H. Lippincott
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.311710
label: catalog number
content: 311710
label: accession number
content: 152541
objectType: label: Object Name
content: Receiver
label: Object Name
content: radio receiver
label: Object Name
content: crystal radio
label: Other Terms
content: Receiver; Radio
physicalDescription: label: Measurements
content: overall: 8 in x 4 in x 18 1/2 in; 20.32 cm x 10.16 cm x 46.99 cm