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1938

alpine

armstrong

built

circuits

earlier

frequency

 invented inventing modulation owned privately radio superheterodyne tower tv

Armstrong Tower, Alpine Tower. Alpine NJ New Jersey. Royalty-Free Stock Photography


Armstrong Tower, Alpine Tower. Alpine NJ New Jersey. Stock Photo
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Armstrong Tower, Alpine Tower. Alpine NJ New Jersey. #81098813
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Built by Armstrong in 1938, when he was inventing FM frequency modulation radio. Armstrong had earlier invented superheterodyne AM circuits. Now privately owned see wiki

Gilknockie Tower, Dumfries and Galloway, Scotland
Gilknockie Tower, Dumfries and Galloway, Scotland
MSY, control tower
Armstrong Tower, Alpine Tower. Alpine NJ Jersey
Armstrong Tower, Alpine Tower. Alpine NJ New Jersey.

Armstrong Tower, Alpine Tower. Alpine NJ
Woods Hole research vessel Neil Armstrong

Newcastle University Royal Jubilee Exhibition Tower
Newcastle University Royal Jubilee Exhibition Tower and head statue

The Clock Tower near the formal garden at Cragside, near Rothbury, Northumberland, UK
The Formal Garden and Clock Tower at Cragside, near Rothbury, Northumberland, UK
View of the round tower and western end in Bamburgh Castle, Bamburgh, Northumberland, UK
View of the round tower through gateway arch in Bamburgh Castle, Bamburgh, Northumberland, UK
View of the round tower at end of ramparts in Bamburgh Castle, Bamburgh, Northumberland, UK