Technical tour EHArmstrong


Self-Guided tour of sites associated with Edwin Howard Armstrong, wireless/radio pioneer


This tour was researched by Sabin Thapa, Stevens Institute of Technology, and constructed by the Staff of the IEEE History Center.

Early Years

Birth at Home

Edwin Howard Armstrong was born to Emily and John Armstrong one week before Christmas day, 1890, at their home at 247 West 29th Street in the Chelsea neighborhood of Manhattan, New York City, USA.

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North Presbyterian Church

Armstrong's parents and relatives were devout Presbyterians; John and Emily met and were married at North Presbyterian church at 31st Street and 9th Avenue, Manhattan, New York City. With his father as a trustee of the church, Howard and his family attended services here before the property was sold for the construction of the Pennsylvania Railroad's Hudson River tunnel and new train station.,_Ninth_Avenue_at_31st_Street,_New_York_City.jpg
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Armstrong's Second Family Home

This home was located at 26 West 97th Street, New York, NY

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Public Grammar School

West 89th, New York, NY

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Yonkers High School

With his physics teachers permission, Armstrong built a wireless receiver and antenna on top of the school. 150 Rockland Avenue, Yonkers, NY

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Runyon's Amateur Radio Station

One of Armstrong's earliest and closet childhood friends, Runyon and Armstrong would communicate by Morse code as kids. Runyon had build one of the first wireless stations in the area.

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1032 Warburton Ave (Regenerative Circuit Invention)

Armstrong invented his famous regenerative circuit in the attic of his family home in Yonkers.

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Notary Office

When his father refused to give Armstrong money to patent his regenerative circuit invention, a family member told Armstrong to get it notarized.

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Camp Evans Laboratory (FM Doppler Radar)

After impressing several Marconi Wireless Telegraph company employees with his invention, Armstrong met with David Sarnoff who brought Armstrong to test our his new regenerative circuit at Camp Evans in Belmar, New Jersey. During WW2, Armstrong experimented with the use of FM radio for radar purposes under an arrangement with the Signal Corps. He modified a SCR-271 radar and created his experimental FM Doppler Radar System which operated on a narrow receiver bandwidth that was frequency modulated to be in sync with the transmitter. Although abandoning the radar to return to his battle for FM radio, his system was modified for use in Project Diana by Col. Dewitt.

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Army Signal Corps Base in Paris (Superheterodyne Invention)

During the First World War, Armstrong was stationed at 140 Blvd Montparnasse where the US Army Signal Corps had set up their headquarters. During his time in the war, Armstrong invented the superhetrodyne in hopes of intercepting high frequency waves coming from enemy engines' ignition systems.
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Later Years

Philosophy Hall, Columbia

At Columbia University, Armstrong worked closely with mentor and friend, Michael Pupin to continue his work as a Professor in Columbia University in the Department of Electrical Engineering.
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West Palm Beach

The Major and his newly wed wife took a honey moon down to Florida in which Armstrong gifted her a portable superheterodyne receiver.

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Randy Runyon's Home

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Marconi Building

Edwin Armstrong purchased this building and then gifted it to David Sarnoff.

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Radio Towers and Broadcast Locations

Aeolian Hall (WJZ)

In 1923, Armstrong climbed the top of the transmitting tower on RCA's tower and had a photographer take his picture.
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Empire State Building (W2XDG)

Armstrong was able to conduct FM radio tests on RCA's experimental TV station on the Empire State Building from 1984-1985.
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Harry Sadenwater's House

Henry Sadenwater and George E Burghard, offered to set up receiving stations in their homes. Burghard's summer house in Westhampton Beach was used and Sadenwater's house at 145 Colonial Ridge Drive Haddonfield,NJ

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Engineering Societies Building

This was the location of the first public demonstration of FM Radio on Nov 6th, 1935

The Engineering Societies Building at 29 West 39th St, completed in 1906
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Armstrong Tower (W2XMN)

After the Empire State Building tests ended, in 1938, Armstrong funded the construction of a transmitter building and 400 foot tower in Alpine, NJ.

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Mt. Washington (W1XER)

The Yankee Network, impressed with Armstrong's FM work, tested the new radio system on their tower. Visit for pictures of Armstrong on Mt. Washington as seen on :

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Asnebumskit Hill

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For a list of other Technical History Tours, please click here.