Homemade Variable Condenser, Used by Charles Apgar, 1915

Summary

In 1915, amateur radio operator Charles Apgar detected coded messages being transmitted by German employees at Sayville Wireless Station, New Jersey. Apgar invented a device to capture these messages onto Edison wax cylinders--the earliest recordings of radio signals. National security was a major concern due to WWI, and Apgar's efforts convinced the US government to seize the Sayville station.

In 1915, amateur radio operator Charles Apgar detected coded messages being transmitted by German employees at Sayville Wireless Station, New Jersey. Apgar invented a device to capture these messages onto Edison wax cylinders--the earliest recordings of radio signals. National security was a major concern due to WWI, and Apgar's efforts convinced the US government to seize the Sayville station.

Artifact

Capacitor

Date Made

1912-1914

Subject Date

1915

Henry Ford Museum
 On Exhibit

at Henry Ford Museum in The Gallery by GM

Object ID

00.625.287

Credit

From the Collections of The Henry Ford.

Material

Aluminum (Metal)
Bakelite (TM)
Brass (Alloy)
Wood (Plant material)

Dimensions

Height: 4.75 in

Width: 1.5 in

Length: 11.125 in

Inscriptions

handwritten: R-3060

Reprint from QST Magazine of December 1916, "Westf...

Details
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