This series contains photographic media, arranged alphabetically. They are separated into two different types of materials; photographs with the negatives, followed by lantern slides. The series spans the course of Armstrong's life including childhood, military service in WWI, and his work in the Marcellus Hartley Laboratory at Columbia University. Images of the apparatus used in the development of regenerative circuit, the superheterodyne circuit and FM radio are also included. The FM-radio materials include the first tests of FM at the Empire State Building, Westhampton Beach, New York and Haddonfield, New Jersey, construction and operation of the first FM tower at Alpine, NJ, and the Yankee Network. Lantern slides that are duplicated in the photographs or negative are marked as "duplicate."
General
Apparatus
Box 265 Folder 1
2660 Megacycle Receiver and Transmitter On Test Bench In Electronic Laboratory Car With Automatic Recording Instruments, undated, undated
Box 265 Folder 2
Apparatus In Tent at Ardrossan, Scotland, undated
Box 265 Folder 3
De Forest Audion Detector; Receiving Cabinet, undated
Box 265 Folder 4
Description of Lantern Slides, undated
Box 265 Folder 5
Empire State Building; FM Transmitters Installed By Armstrong, E.H.,, 1934-1935
Box 265 Folder 6
FM Radio--Apparatus Used in the First Presentation of FM to the Engineering World, Reception of W2AG Broadcast from Yonkers, NY,, 1935 November
Box 265 Folder 7
General Electric FM Radio Set, undated
Box 265 Folder 8
Installation of the "Runyon Transmitter" On the Chimney of Randy Runyon's Beach House in Mantoloking, New Jersey, undated (includes negative), undated
Box 265 Folder 9
Original Components of the Regenerative Circuit, undated
Box 265 Folder 10
S.S. President Harding Experimental Facsimile Receiver for Daily Reception of Complete Weather Maps,, undated
Box 265 Folder 11
Turbines and Generators--Chicago Edison, Boston Edison, Commonwealth Edison, [1915]
Box 265 Folder 12
U.H.Apparatus [Labeled "Criswell Photos"], 1934-1936, 1939-1941, 1934-1936, 1939-1941
Box 265 Folder 13
Washington Apparatus-- Includes Correspondence from Weigant to Hughes,, 1926 March 19
Box 265 Folder 14
Unidentified Apparatus, 1920, 1936-1937, 1920, 1936-1937
Box 265 Folder 15
Unidentified Apparatus, undated (includes negatives), undated
Box 265 Folder 16
Unidentified Apparatus [Possibly Power Amplifier], undated
Armstrong, E.H.
Box 265 Folder 17
Armstrong, E.H., 1940 May 8
Box 265 Folder 18
Armstrong, E.H. and Paul De Mars at Westhampton Beach, 1947
Box 265 Folder 19
Armstrong, E.H. and Unidentified in Academic Robes; Wilson-Degree at Columbia University,, undated
Box 265 Folder 20
Armstrong, E.H. Holding a Trophy Next to Unidentified Holding a Tennis Racket, Vermont,, undated
Box 265 Folder 21
Armstrong, E.H. In Later Life, Portrait by Fabian Bachrach, undated
Box 265 Folder 22
Armstrong, E.H. Installing an Antenna On a Chimney, undated
Box 265 Folder 23
Armstrong, E.H. On Couch With Unidentified, undated
Box 265 Folder 24
Armstrong, E.H. Presenting a Paper to the American Institute of Electrical Engineers in New York,, 1947
Box 265 Folder 25
Armstrong, E.H. Receiving the Washington Award from the Western Society of Engineers (L to R: Calvert, John H; Sykes, Wilfred; Armstrong, E.H.; Sedwick, H.P);, 1951 February 19
Box 265 Folder 26
Armstrong, E.H. Receiving Honorary Degree of Doctor of Science from Dr. Levering Tyson, President of Muhlenberg College,, 1941 June 2
Box 265 Folder 27
Armstrong, E.H. Receiving the Edison Medal from the AIEE in New York City, Pictured with Gerald Swope receiving the Hoover medal and Willie R. Whitney receiving the John Fritz Medal,, 1943 January 27
Box 265 Folder 28
Armstrong, E.H., R. Wand and D. Dembar in the Palisades, undated
Box 266 Folder 1
Armstrong vs. De Forest Before Judge Mayer in Courtroom, 1921 (negative only), 1921
Box 266 Folder 2
Columbia University-- John H. Bose and E.H. Armstrong in Dean Danning's office,, 1953 March 16
Box 266 Folder 3
Dedication Ceremonies of 1BCG monument, with Ernest V. Amy, E. H. Armstrong, George E. Burghard, Orestes H. Caldwell, Paul Godley, and Wilbur H. Peck, in Greenwich, Connecticut,, 1950 October 21
Box 266 Folder 4
Franklin Institute Awards in the Field of Science with E.H. Armstrong, Ralph A. Sayre, and Gerard Campbell,, 1941 January 8
Box 266 Folder 5
Group Including E.H. Armstrong, Perry Osborn, Charley Fowler, John Bose, T.J. Styles,, undated
Box 266 Folder 6
"Hero of Corregidor"--Sergeant Irving Strobing Receives VWOA Scholarship from William J. McGonigle, at the Radio Pioneers Dinner, Pictured with E.H. Armstrong, George W. Bailey, and William Everitt,, 1945 November 8
Box 266 Folder 7
Image of Plaque with Portrait of E.H. Armstrong Dedicated to William Thomas Russell,, undated
Box 266 Folder 8
Major Edwin H. Armstrong and Major General Roger B. Colton, 1944
Box 266 Folder 9
Major General H.C. Ingles Presents the First Certificate of Appreciation to Dr. E.H. Armstrong,, 1944 June 17
Box 266 Folder 10
Passport (United States) Belonging to E.H. Armstrong,-- Includes British and French Visas,, 1922 August 19
Box 266 Folder 11
Portrait of Armstrong, E.H., undated (negative only), undated
Box 266 Folder 12
Portrait of Armstrong, E.H. While a Student at Columbia University, Signed "Holston, N.Y.,", undated
Box 266 Folder 13
Professor Armstrong Presented With a Certificate of Honorary Membership in the Columbia Engineering Alumni Association by A. Dexter Hunckley,, 1951 May 3
Box 266 Folder 14
Professor W.H. Lighty and E.H.Armstrong, at the University of Wisconsin, 1945 (includes correspondence), 1945
Box 266 Folder 15
Restaurant Gathering, All In Tuxedos With Armstrong in the Rear "Guest of Honor" Position, Pans,, undated
Box 266 Folder 16
Sadenwater, Harry and E.H. Armstrong, undated
Box 266 Folder 17
"The Major" (Armstrong, E.H.) On the Phone As Usual, 1940 June 29
Box 266 Folder 18
Wedding Photographs of Evelyn Kreft Peterson (Mrs.George G.) and Thelma Cleven Stead (Mrs. David N), Both With Armstrong, E.H.,, undated
Box 266 Folder 19
Yankee Network--E.H. Armstrong, and Yankee Network car, undated
Box 266 Folder 20
Armstrong, Marion-- Margaret Foster Smith and Marion Armstrong, Being Pushed in a Tourist Cart,, undated
Box 266 Folder 21
The Armstrong Medal [both sides], undated
Box 282 Folder 1
Bachelor Dinner for George Burghard, 1928 January 20
Box 266 Folder 22
Brinkman, Harold A. and Glenn D. Gunn Speaking Over the First FM Network,, 1947 March 26
Box 266 Folder 23
Calendar--Summer House of E.H. and Marion Armstrong at Rye Beach, New Hampshire, 195
Box 266 Folder 24
Catskills [Mountain House], undated
Box 266 Folder 25
Christmas Card and Larger Photograph of a Group of Unidentified Individuals, Including Emily Smith Armstrong and Ethel Armstrong Hammond,, 1932
Box 266 Folder 26
Correspondence From B. Roger Colton of the War Department, Army Services Forces Regarding a Photograph of a Gentleman Saying "Frequency Modulation is the Answer to all Problems,", 1944 September 19
Box 266 Folder 27
Correspondence From Ann Mosher, Associate Editor of Today's Woman Regarding Photographs For Mrs. (Esther Marion) Armstrong's article, 1948 June 3
Box 266 Folder 28
Envelope With Written Description of Individuals Present at Edwin H. Armstrong Awards,, undated
Box 266 Folder 29
Fashion Parade--A.C. Armed Forces--Air Force Fire-Fighting Suit and Parachute Suit,, 1950 March 31
Box 282 Folder 10
FM Broadcasters Inc.--Fifth Annual Meeting, New York City, 1944 January 26-27
Box 266 Folder 30
FM Demonstration--Mortimer Fogel, Present at Demonstration of Ira Hirschmann's Broadcast at the Engineering Society Building,, 1947
Box 266 Folder 31
Hispano-Suiza Car Insurance Receipt, Paris, 1922 October 9
Box 266 Folder 32
Interior View--Labeled "Poughkeepsie, J.R. Day, John H. Bose,", 1940 March 21
Box 266 Folder 33
Mrs. Barbara Musselman's Children at Christmas, 1951
Box 282 Folder 11
National Modern Pioneers Banquet, New York, 1940 February 27
Box 266 Folder 34
Negatives Recopied and "Blown Up" to 8x10 Size For Mr. Horace Coon For Use In His Story For "Science Illustrated," 1946 February 28 (negatives only), 1946 February 28
Box 266 Folder 35
New York Evening World Cartoon, "Who said Radio for Shut-Ins?"--Regarding Skyrocketing of "Radio Common," 1928 March 14 (includes negative), 1928 March 14
Box 266 Folder 36
New York Times Front Page as Transmitted by Facsimile Over FM,, 1934 November 24
Newspapers, Yonkers Area
Box 266 Folder 37
The Yonkers Statesmen, 1913 February
Box 266 Folder 38
Tarrytown Daily News, 1913
Box 266 Folder 39
Mt. Pleasant Daily News, 1913 February 8
Box 266 Folder 40
Performance of Phil Spitalny's Hour of Charm Radio Show at Proctor's Theater, Schenectady, New York,, undated
Box 266 Folder 41
The Porch on Back of House Facing #2 Fairway, undated
Box 266 Folder 42
Postcard of The Bungalow, Residence of H.H. Jenkins, in Norfolk, Connecticut,, undated
Box 266 Folder 43
Road Map of New England With List of Radio Stations, 1940 (negative only), 1940
Box 267 Folder 1
Snapshots Taken at Fred Hargescheimer's in White Bear Lake, Minnesota,, 1951 July
Box 267 Folder 2
Underhill Buildings in Lower Bank, undated
Box 267 Folder 3
US Army Band [as heard on Wednesday FM radio] at Fort Myer, VA, undated (includes correspondence), undated
Box 267 Folder 4
US Army Air Forces Band [as heard on Thursday FM radio] at Boiling Field, Washington D.C.,, undated
Box 267 Folder 5
US Army Air Forces Band Performing the First Post-War FM Network Landline and Radio Link Broadcast,, 1947 March 26
Box 267 Folder 6
View of [Hudson] River, undated
Box 267 Folder 7
Unidentified House with Ladders and Wiring Strung Up the Side, 1939 December 19
Box 267 Folder 8
Unidentified Individuals, undated
Box 267 Folder 9
Unidentified Man--Portrait, undated (includes negative and original envelope), undated
Box 282 Folder 2
Unidentified Man--Portrait by Fabian Bachrach, undated
Box 267 Folder 10
Unidentified Man With Apparatus, undated (negative only), undated
Box 267 Folder 11
Unidentified Man With Radio--Interior View, 1943 January 25
Box 267 Folder 12
Unidentified Radio Pole, undated (negative only), undated
Box 267 Folder 13
Unidentified Radio Towers--Exterior Views, undated
Box 267 Folder 14
Unidentified Tangle of Wires, undated (negatives only), undated
Aeolian Hall, New York City
Box 267 Folder 15
Armstrong, E.H. Climbing WJZ Station's Antenna Tower--Close-up View, 1923 May 14
Box 267 Folder 16
Armstrong, E.H. Climbing WJZ Station's Antenna Tower--View From Ground, 1923 May 14 (includes negatives), 1923 May 14
Alpine, New Jersey
Individuals
Armstrong, E.H.
Box 267 Folder 17
Armstrong, E.H. and Harry "The Rigger" Jorgenson on Turnstile Antenna, undated (includes negatives), undated
Box 267 Folder 18
Armstrong, E.H. and Unidentified on Radio Tower, undated (includes negatives), undated
Box 267 Folder 19
Armstrong, E.H., Charley Fowler, and Unidentified Individual Wearing Homemade Ice Shields to Protect From Falling Ice, 1941 January 18 (includes negative), 1941 January 18
Box 267 Folder 20
Armstrong, E.H. and Unidentified Standing on Radio Tower, undated
Box 267 Folder 21
Armstrong, E.H. and Unidentified in Front of W2XMN Building, undated
Box 267 Folder 22
Armstrong, E.H. and Unidentified in Front of FM Transmitter Apparatus,, undated
Box 267 Folder 23
Armstrong, E.H., R. Allsofo and Unidentified in Front of W2XMN Building,, 1945 November
Box 267 Folder 24
Armstrong, E.H. on Icy Radio Tower, 1940
Box 267 Folder 25
Armstrong, E.H. and Group at the Base of the Radio Tower, undated (includes negatives), undated
Box 267 Folder 26
Armstrong, E.H. and Unidentified With Radar Antenna, undated (negative only), undated
Box 267 Folder 27
Armstrong, E.H. and Unidentified in Front of a Shed in Winter, undated
Fowler, Charley
Box 267 Folder 28
Fowler, Charley With Crowbar on Icy Radio Tower, undated
Box 267 Folder 29
Fowler, Charley, Perry Osborn and Unidentified in Front of Shed, undated (negative only), undated
Box 268 Folder 1
Fowler, Charley and Unidentified on Radio Tower, undated (includes negatives), undated
Box 268 Folder 2
Fowler, Charley on Construction Site of the Radio Tower, 1937 (includes negatives), 1937
Box 268 Folder 3
Fowler, Charley With a Cigarette, undated
Box 268 Folder 4
FMA Party, 1947 September 13
Box 268 Folder 5
Gempp, Ted--In the Control Room, 1952 February
Osborn, Perry
Box 268 Folder 6
Osborn, Perry, undated
Box 268 Folder 7
Osborn, Perry In the Control Room, 1941 September 29
Box 268 Folder 8
Osborn, Perry Shown With Various Transmitting Equipment [Including Captions],, 1939 July 7
Box 268 Folder 9
Osborn, Perry With Original and Updated Multiplexing Units, undated
Box 268 Folder 10
Osborn, Perry With Transmitting Apparatus, undated (negative only), undated
Unidentified Individuals
Box 268 Folder 11
Unidentified Individuals with Transmitter Apparatus, undated
Box 268 Folder 12
Unidentified Individuals Around the Construction Site of the Tower,, 1937
Box 268 Folder 13
Unidentified Individuals on the Radio Tower, undated (includes negatives), undated
Box 268 Folder 14
Unidentified Individuals on Icy Radio Tower, 1953 January 10
Box 268 Folder 15
Unidentified Individuals Standing with Radar Antenna, undated
Box 268 Folder 16
Correspondence From William Maron Regarding Photographs Taken at Alpine,, 1947 September 27
Interior Views
Box 268 Folder 17
Blower Unit, Motor Generator, Rectifier and Relay Group, undated
Box 268 Folder 18
Control Room, 1941 September 29 (includes negatives), 1941 September 29
Box 268 Folder 19
Control Room, 1952 February
Box 268 Folder 20
Control With Rack Equipment for the Generation of Frequency Modulated Current,, undated
Box 268 Folder 21
Early Model of Intermediate Stages--Frequency Multipliers and Low Power Amplifiers,, undated
Box 268 Folder 22
FM Transmitter Apparatus, 1943
Box 268 Folder 23
Final [High Power Amplifier] Stage Shielded Behind Copper Screening, undated (includes negatives), undated
Box 268 Folder 24
High Band Apparatus, undated
Box 269 Folder 1
High Power Amplifier, 1938 August 29 (includes negatives), 1938 August 29
Box 269 Folder 2
High Power Amplifier and Intermediate Stage, 1938 May 4 (negatives only), 1938 May 4
Box 269 Folder 3
Original Frequency Multiplier and Intermediate [low power] Stages,, 1940 May 7
Box 269 Folder 4
Power Amplifier High Band Apparatus, 1952 February
Box 269 Folder 5-6
Radar Lab Apparatus, 1948 October 11, undated (negatives only), 1948 October, undated, (2 Folders)
Box 269 Folder 7
Relay High Frequency Transmitter, undated
Box 269 Folder 8
Single Unit Grid Isolation Oscillator Set Up With Solid Dielectric Feedback Cable,, undated
Box 269 Folder 9
Unidentified FM Transmitter Apparatus, undated
Exterior Views
Box 269 Folder 10
40 Megacycle Turnstile Antenna, 1940
Box 269 Folder 11
Air View of 400 Foot Radio Tower and Transmitter Building, undated (includes negatives), undated
Box 269 Folder 12
Antenna on Corner of W2XMN building, 1941 January 17
Box 269 Folder 13
Base of the Radio Tower, undated (includes negatives), undated
Box 269 Folder 14
Cable Connections on Tower, 1946 January
Box 284
Ceramic Plate Featuring Alpine Tower, undated
Box 269 Folder 15-17
Construction of the Tower, 1937 (includes negatives), 1937, (3 Folders)
Box 270 Folder 1-2
Construction of the Tower, 1937, (2 Folders)
Box 270 Folder 3
Construction at the W2XMN Building Site, 1937 August 2
Box 270 Folder 4-5
Early Construction Site, 1937 March (includes negatives), 1937 March, (2 Folders)
Box 270 Folder 6
Eight Bay Doughnut Antenna, 1947 January 31
Box 270 Folder 7
Exterior View of Water Tower, 1937 May 26
Box 270 Folder 8
Exterior View of W2XMN Building, undated (includes negative), undated
Box 270 Folder 9
Exterior Views Taken From the Radio Tower, undated (includes negative), undated
Box 270 Folder 10
Installation of the Turnstile Antenna, undated (includes negatives), undated
Box 283
Metal Etching of Alpine Tower, undated
Box 270 Folder 11
Most Widely Publicized View of Alpine Tower, Made With a "Brownie Box" Camera, undated (includes negative), undated
Box 270 Folder 12-13
Original Radio Mast, 1937 November 10, December 4 (includes negatives), 1937 November, (2 Folders)
Box 282 Folder 3
Poster of Alpine Tower, undated
Box 271 Folder 1-2
Radar Tower, 1949 November, undated (negatives only), 1949, undated, (2 Folders)
Box 271 Folder 3
Radio Tower Before Erection of Turnstile Antenna, 1938 (includes negatives), 1938
Box 271 Folder 4-5
Radio Tower, 1948 June 17, 1950 June, 1948 June, 1950 June, (2 Folders)
Box 271 Folder 6
Radio Tower With Turnstile Antenna, undated (includes negatives), undated
Box 271 Folder 7
Stump of Tree Struck by Lightning Near Tower, 1941 July 2 (includes hand-drawn diagram), 1941 July 2
Box 271 Folder 8
Two Pairs of RG190 Cables From Antenna Elements Connecting to the Half-Wave Matcher,, 1947 April 26
Box 271 Folder 9
Transformers Outside W2MXN Building, undated (includes negatives), undated
Captain H.J. Round
Box 271 Folder 10
Autographed Photographs, 1960, 1964, 1960, 1964
Box 271 Folder 11
Images of Pages From "Wireless at Sea" By H.E. Hancock [text Concerning Captain Round in the Army],, undated
Connecticut State Police
Box 271 Folder 12
Armstrong, E.H. Standing With Police, undated
Box 271 Folder 13
FM Car Radio Apparatus and Installation In Vehicle, undated
Box 271 Folder 14
FM Car Radio Dispatcher and Station, undated
DeMars, Paul
Box 271 Folder 15
Pictures Taken In Iran, undated
Box 271 Folder 16
DeMars, Paul Standing With Apparatus, undated
Early Family and Childhood
Box 271 Folder 17
Armstrong House and Surrounding Area, undated
Box 271 Folder 18
Armstrong, Cooper, Robinson, Ross, Morris, Mason, Sage, Stewart and Smith Families in Group Photograph, undated (includes individual identification on back), undated
Box 271 Folder 19
Armstrong, E.H. As An Adolescent, undated
Box 271 Folder 20
Armstrong, E.H. at Six Months old, 1891
Box 271 Folder 21
Armstrong, E.H. Standing in Front Of a Barn as a Child, Puckere, 1897
Box 271 Folder 22
Armstrong, E.H. With Sisters Edith and Ethel, 1893, undated, 1893, undated
Box 272 Folder 1
Armstrong, E.H. With Toys, Recovering From Scarlet Fever; With Sister Ethel Gertrude,, undated
Box 272 Folder 2
Armstrong Edith Rissie, Later Mrs. Thomas H. Beardsley-- Baby Photographs--Portrait; After Marriage, undated,, 1939 June
Box 272 Folder 3
Armstrong, John-- Studio Photograph Holding Cane and Hat-- Portrait--In Chair With Unidentified,, undated
Box 272 Folder 4
Armstrong, Mary, undated
Box 272 Folder 5
Derthick Farm--Armstrong Family in Hammock, undated
Box 272 Folder 6
Early Radio Anchorages, undated
Box 272 Folder 7
Family Photographs, undated
Box 272 Folder 8
Family Playing Tennis, undated
Box 272 Folder 9
Group Photograph Including Emily S.Armstrong, John Armstrong, Edith Armstrong, and E.H. Armstrong, Holding Sign that Reads "Reception Committee for the biggest kidder on Lake George,", undated
Box 272 Folder 10
House at 1032 Warburton Ave, Yonkers, NY, undated, undated
Box 272 Folder 11
Portrait of Ethel Gertrude Armstrong, 1915
Box 272 Folder 12
Radio Pole at 1032 Warburton Ave and Old Aerials, undated (includes negatives), undated
Box 272 Folder 13
Smith, Estelle, Edith Rissie Armstrong, and Ethel Gertrude Armstrong,, undated
Box 272 Folder 14
"Uncle Bill Russell, Who Stimulated E.H. Armstrong as a Youngster in Radio,", undated
Box 272 Folder 15
Wedding Photograph of Ethel Armstrong Hammond, 1919 October 4
Box 272 Folder 16
Young Unidentified Children in Costume, undated
Box 272 Folder 17
Unidentified Individual [likely Armstrong, E.H.] Installing Top of Antenna on Radio Pole at 1032 Warburton Ave., undated, undated
Figures and Plots
Box 272 Folder 18
Comparison of FM Service Areas Available on 46 and 105 MC, undated (negatives only), undated
Box 272 Folder 19
Energy Polar Diagrams, undated (negatives only), undated
Box 272 Folder 20
Figures Demonstrating Effects of FM on Voltage Phase--From E.H. Armstrong's Technical Paper "Reducing Disturbances in Radio By Frequency Modulation," undated (negatives only), undated
Box 272 Folder 21
Figures From E.H. Armstrong and J. Bose--Technical Paper "Recent Developments in Multiplex Transmission," undated (negatives only), undated
Box 272 Folder 22
Figures Illustrating Plate Tuning For Transmitters and Receiver Units,, undated
Box 272 Folder 23
Figure Showing Distribution of Potential Along Filament, Filament Tuning and Plate Tuning Circuit, undated (negative only), undated
Box 272 Folder 24
FM radio--N.J. State Museum Exhibit Showing Early FM Tube Sent From E.H.Armstrong to Howard Schrader of Palmer Laboratories at Princeton University,, undated
Box 272 Folder 25
Frequency Allocations Between 40 and 129 Megacycles, undated (negative only), undated
Box 273 Folder 1-3
Oscillograms, 1916 (3 Folders, negatives only), 1916
Box 273 Folder 4
Oscillograms Demonstrating Regeneration, undated
Box 273 Folder 5
Plots of Tropospheric Wave Propagation, Ground Waves, Field Intensity, 1943-1944 (negatives only), 1943-1944
Box 273 Folder 6
Radar Plots, undated
Box 273 Folder 7
Signal Plots From Montoloking, NJ, Andalusia, Penna, and Deerfield Receiving Station, 1945, 1946, undated (negatives only ), 1945, 1946, undated
Box 273 Folder 8
Spectrograms Demonstrating Sidebands Taken on Panoramic Receiver, undated
FM Radio Stations
Box 273 Folder 9
Continental Network (Early FM) Dedication With E.H. Armstrong and Unidentified Person,, undated
Mount Washington Radio Station, New Hampshire
Box 273 Folder 10
Equipment Buildings and Surrounding Area, undated
Box 273 Folder 11
Exterior Views of Engineers At Work, undated
Box 273 Folder 12
Postcards, undated
Box 273 Folder 13
Rime Crystals On Radio Tower, 1940 August 24
Box 273 Folder 14
Mt. Holly Antennas and Mobile Setup In Vicinity For Field Strength Measurements, 1949 April 25-29 (includes negatives), 1949 April 25-29
Box 273 Folder 15
Pollock, Dale's Radio Setup, New London, Connecticut, undated
Box 273 Folder 16
Radio Diablo Transmitter and Station Atop Mount Diablo, California, 1948 (includes correspondence), 1948
Box 282 Folder 4
VP5PZ, Now ZQI-- Album--Includes Apparatus, Radio Aerial, and Unidentified Individuals,, undated
W1XOJ, Paxton, Massachusetts
Box 274 Folder 1
Apparatus, 1939-1940 (includes descriptions and correspondence), 1939-1940
Box 274 Folder 2
Exterior Views of Building and Antenna Towers, 1939-1940
Box 274 Folder 3
Unidentified Individuals, undated
W1XPW, Hartford, Connecticut
Box 274 Folder 4
Apparatus--Including Front and Rear Panels, 1940 August 20 (negatives only), 1940 August 20
Box 274 Folder 5
Radio Pole and Unidentified With Apparatus, 1939 January 15
W2AG, Yonkers, New York
Box 274 Folder 6
Apparatus, 1936 (includes negatives), 1936
Box 274 Folder 7
Modulator, undated
Box 274 Folder 8
W45CM, Columbus, Ohio-- Frank A.Gunther and Nafzger, undated
Box 274 Folder 9
W45D, Detroit, Michigan-- Dedication with E.H. Armstrong, Thomas E.Moore, and unidentified,, 1941 October 18
Box 274 Folder 10
W47A--Capitol Broadcasting Company, Inc.--Building and Building Site,, undated
Box 274 Folder 11
W65H--Billboard, undated
WDRC, Meriden, Connecticut
Box 274 Folder 12
Exterior Views of Building and Site, 1939
Box 274 Folder 13
Radio Equipment With Description, 1939
Box 274 Folder 14
Relay Equipment, 1946 January 21 (includes correspondence), 1946 January 21
Box 274 Folder 15
WMIT, Mount Mitchell, North Carolina--Tower, Building And WMIT Car, undated
WOR-FM, New York
Box 274 Folder 16
Armstrong, E.H. and C.R.Runyon, undated
Box 274 Folder 17
Armstrong, E.H. and Unidentified, undated
Germany
Box 274 Folder 18
Gravelly Point Strategic Bomb Survey of Bodensee, Meersburg, Lowenthal, and Mansdorf--Taken By Fred Hargesheimer Regarding Olga Wueschner,, undated
Box 274 Folder 19
Television Laboratory On Wheels--Sponsored By The German Post Office to Determine The Locations Where The Television Transmitters Of The Large Network to be Erected Were to be Situated,, undated
Box 274 Folder 20
Ultra Short Wave Transmitter--Titled The "World's Largest Ultra Short Wave Transmitter,"--These Two Transmitters Were Inaugurated in January 1936 After The Previous Ones Were Destroyed by Fire, undated, January 1936, undated
Haddonfield, New Jersey
Box 275 Folder 1
Armstrong Receiving Apparatus at the Home of Harry Sadenwater in Haddonfield, New Jersey, 1934-1935 (includes negatives), 1934-1935
Box 275 Folder 2
Early Antenna For FM Reception, 1934 June (includes negative), 1934 June
Box 275 Folder 3
Multiplex Receiving System, undated (includes negatives), undated
Box 275 Folder 4
Receiving Antenna--Demonstrating the Small Size of The Antenna Required For An Ultra Shortwave System, 1934-1935 (includes negatives), 1934-1935
Marcellus Hartley Laboratory, Columbia University
Box 275 Folder 5
Apparatus From Columbia University Photographic Section, undated (negatives only), undated
Box 275 Folder 6
Apparatus Regarding "No Frequency Shift With Plate Voltage?", undated
Box 275 Folder 7
Apparatus Used by E.H. Armstrong in Reception of Station WEAF--Special Experimental Unit Used with Regular Transmitting Unit at Bellmore, Long Island--Demonstration Made to Dr. W.R.G. Baker,, 1933 February 4
Box 275 Folder 8
Chassis Collection, undated
Box 275 Folder 9
Early Wide Band Photos, 1932-1933
Box 275 Folder 10
First Alpine Modulation Equipment On Test at Columbia, 1936
Box 275 Folder 11
Inside Cage View of First FM Transmitter, Northeast Room, Philosophy Hall,, 1932-1933
Box 275 Folder 12-16
Interior Views and Apparatus, 1925, 1927, 1930 (includes negatives), 1925, 1927, 1930, (5 Folders)
Box 276 Folder 1-10
Interior Views and Apparatus, 1931-1933, 1935-1936, 1931-1933, 1935-1936, (10 Folders)
Box 277 Folder 1-8
Interior Views and Apparatus, 1936-1939, 1943, undated, 1936-1939, 1943, undated, (7 Folders)
Box 277 Folder 9
Modulation Apparatus, undated
Box 277 Folder 10
Original FM Modulator and Power Amplifier Built For Use at Alpine, 1936 April 29
Box 277 Folder 11
Original Regenerative Circuit Apparatus Built By E.H. Armstrong, While a Student At Columbia University,, 1943 March
Box 277 Folder 12
Power Amplifier and Intermediate Power Amplifier of Frequency Modulation Transmitter, undated (includes negatives), undated
Box 278 Folder 1
Remains of War Chassis, undated (includes negatives), undated
Box 278 Folder 2
Signal Corps Job, 1943 December 1 (includes negatives), 1943 December 1
Box 278 Folder 3
"Special Equipment"--In 201 Philosophy, 1943 January 25 (includes negatives), 1943 January 25
Box 278 Folder 4
"Timing Of Waveform"--Rejector As Set Up During WWII, undated
Box 278 Folder 5
Unidentified Individuals, undated
Marconi Shack--Original
Box 278 Folder 6
Armstrong, E.H. In Front of the Shack, undated
Box 278 Folder 7
Armstrong, E.H. and Guglielmo Marconi In Front of Shack, Rocky Point, New York,, undated
Box 278 Folder 8
Armstrong, E.H. [and possibly Marion] In Front of Shack, Babylon, New York,, undated
Box 278 Folder 9
Armstrong, E.H. and Unidentified In Front of the Shack, Babylon, New York,, undated
Box 278 Folder 10
Moving The Shack Onto a Truck For Relocation to Rocky Point, Babylon, New York,, 1930
Box 278 Folder 11
Photos of the Building Before Purchase and Relocation by E.H.Armstrong to Babylon, New York, undated (includes negatives), undated
Box 278 Folder 12
Shack In Front of RCA Building, undated
Box 278 Folder 13
The Shack In Front of RCA's Transmitting Station, Building #1, Given as a Gift From E.H. Armstrong, Rocky Point, New York,, undated
Marconi, Guglielmo
Box 278 Folder 14
Captions of Photographs Sent to E.H. Armstrong in New York, 1953 September
Clifden, Ireland
Box 278 Folder 15
"Marconi Express" Peat Train, undated
Box 278 Folder 16
Marconi With His Engineers Including C.S. Franklin, Later to be the Designer of the S.W. Beam System, Standing at Extreme Left,, 1913
Box 278 Folder 17
Transatlantic Wireless Station, undated (includes correspondence), undated
Box 278 Folder 18
D.Station at Either Aberdeen or Flambora Head, undated
Box 278 Folder 19
Images From "Marconi Jubilee 1897-1947,", undated
Box 278 Folder 20
Images From "Wireless at Sea" By H.E. Hancock, Monument and English Royalty Near Poldhu Station,, undated
Box 278 Folder 21
Images From Wireless World by H.E. Hancock--Marconi at Signal Hill With Instruments,, undated
Box 278 Folder 22
Marconi's Diary For 1901 December 12-13, In Which He Recorded In Ink the Times of His Reception of the First Transatlantic Wireless Signals, undated, 1901 December, undated
Box 278 Folder 23
Marconi In The Room at Signal Hill, St. Johns, Newfoundland With Apparatus Used to Receive the First Transatlantic Wireless Signals in 1901 December, undated, 1901, undated
Box 282 Folder 5
Marconi Station at Siasconset, Nantucket, Massachusetts, undated
Box 278
Poldhu, Cornwall
Box 278 Folder 24
Exterior View In 1923, undated (negative only), 1923, undated
Box 278 Folder 25
Poldhu Wireless Station--Used For the First Transoceanic Service For Wireless Telegraphy,, undated
Box 278 Folder 26
Tonkin, Charles, William Gilbert, Edward Hodge, and James Exelby, of Mullion at Fiftieth Anniversary of the First Spanning of the Atlantic by wireless,, 1951 December 12
Box 278 Folder 27
Preparing the Kite Which Raised the Receiving Aerial at St. John's, Newfoundland With Which Marconi Received the First Transatlantic Wireless Signals in 1901, undated, 1901, undated
Box 282 Folder 6
Transatlantic High Power Marconi Station at Glace Bay, Nova Scotia, undated
Box 282 Folder 7
Transatlantic Station at South Wellfleet, Cape Cod, Massachusetts, undated
Notebooks
Box 278 Folder 28
Contains Military Photographs--Handwritten Note by Armstrong About his Grandfather's Cat--News Clippings,, undated
Box 278 Folder 29
Contains Wedding Notice of Emily Gertrude Smith to John Armstrong--Reception Notice From the Smiths--William West McIntosh Oration Note--News Clippings,, undated
Box 279 Folder 1-2
Scrapbook Belonging to Emily Gertrude Smith--Includes Derthick Farm, Howard's School Examination, Marriage Announcement, Howard's Completion of Credits for the Degree of Electrical Engineering, John Armstrong's Obituary, Pupin Announcement of Wireless Invention, Captain Edwin H. Armstrong, and News Clippings,, 1886-1901, (2 Folders)
Pupin, Michael I.
Box 279 Folder 3
Armstrong, E.H. Speaking at Funeral Service, undated
Box 279 Folder 4
Pupin Holding the John Fritz Medal and Dr. Edwin Wilbur Rice, Jr. Holding the Edison Medal Presented by the American Institute of Electrical Engineering,, 1931 January 27
Box 279 Folder 5
Early Laboratory Picture, undated (includes negative), undated
Box 279 Folder 6
Exterior View, Holding Papers, undated
Box 279 Folder 7
Postcard of Hemlock Farm, the Residence of M.I. Pupin, in Norfolk, Connecticut,, undated
Radio Club of America
Box 282 Folder 8
40th and 41st Annual Banquet, Advertising Club of N.Y., 1949, 1950, 1949, 1950
Box 282 Folder 12
Annual Banquets--Including Presentations of the Armstrong Medal to Harry W. Houck, J.V.L. Hogan, Charles S. Ballantine, and Henry J. Round, 1936-1939, 1941, 1947, 1949-1953, 1936-1939, 1941, 1947, 1949-1953
Box 282 Folder 13
Banquet--Hotel Ansonia, 1919 November 19
Box 282 Folder 9
Banquet Smoker Beefsteak Dinner, Brooklyn, New York, 1931 April 22
Box 282 Folder 14
Dinner for Captain Round, 1929 October 4
Box 279 Folder 8
Manuscript of Article From The Wireless Age accompanying Photograph of Banquet Given in Honor of Armstrong, E.H. on 1919 November 19, 1919 December, 1919 November, 1919 December
Box 279 Folder 9
Members at Dinner for Captain H.J. Round, New York, 1929 October 4
Box 279 Folder 10
Reprint of Proclamation Upon the Death of E.H. Armstrong, undated
Radio Engineering Labs (REL)
Box 280 Folder 1
Armstrong Modulator, undated
Box 280 Folder 2
FM Receiver, undated
Box 280 Folder 3
Production Plant and Equipment, undated
Box 280 Folder 4
Transmitter Equipment--Open Cabinet Views, undated
Box 280 Folder 5
Two Way Car Equipment, undated
R.C.A. Communications
Box 280 Folder 6
Long Wave Receivers at Riverhead, undated
Box 280 Folder 7
Radio Central Building Transmitters and Antennas, undated
Box 280 Folder 8
Short Wave Receivers and Rack, Riverhead, Long Island, undated
Box 280 Folder 9
Switchboard at RCAC Central Office, Broad St., New York, undated
Box 280 Folder 10
Transmitter Apparatus Used in Transoceanic Service, undated
Superheterodyne Receiver
Box 280 Folder 11
Experimental Wave Heterodyne Receiver Side View, Navy Yard, New York,, 1920 January 3
Box 280 Folder 12
First Superheterodyne Installed At the Seagate Station by the US Navy in 1918 1941 May 19, 1918, 1941 May 19
Box 280 Folder 13
First Superheterodyne Radio Receiver Developed in 1917, undated (includes correspondence), 1917, undated
Box 280 Folder 14
Interior Of the Original Receiver Built on the Second Harmonic Principle,, undated
Box 280 Folder 15
Portable Unit With Which an Inexperienced Woman Heard 2LO During the Tests Run by Radio Broadcast and Wireless World, undated (includes negative), undated
Box 280 Folder 16
Second Superheterodyne Radio Receiver Developed In 1922, undated, 1922, undated
Box 280 Folder 17
Six-Tube Receiver, undated (includes negative), undated
Box 280 Folder 18
Third Superheterodyne Radio Receiver With Five-Tube Layout and Loudspeaker,, undated
Box 280 Folder 19
US National Museum Exhibit With Regenerative and Superheterodyne Receivers,, 1955
Washington, D.C.
Box 280 Folder 20
Columbia University Professor E.H. Armstrong Explains New Radio Broadcast System to F.C.C.,, 1936 June 17
Box 280 Folder 21
Testifies Before the House Labor Committee, 1918 January 15
Westhampton, New York
Box 280 Folder 22
Armstrong Receiving Apparatus at Home of George Burghard, undated (includes negatives), undated
Box 280 Folder 23
Notarized Photos of Equipment With Notes--Armstrong vs. Hansell Interference,, 1937 September 20
Box 280 Folder 24
Receiving Apparatus, 1934 June (includes negative), 1934 June
Box 280 Folder 25
Receiving Apparatus, 1936 June
Box 280 Folder 26
Westhampton, Pre-Hurricane, undated (includes negatives), undated
Box 280 Folder 27
Westhampton Recorder Pictures by Fred Hargesheimer, 1947
World War I
Box 281 Folder 1
Armstrong, E.H. in Uniform With the Rank of Captain in the Signal Corps,, undated
Box 281 Folder 2
Major Armstrong in Uniform, undated (includes negative), undated
Signal Corps--France
Box 281 Folder 3
Armstrong, E.H. and Unidentified Individual in Airplane (Armstrong Developed First Airplane Radios During WWI),, undated
Box 281 Folder 4
Armstrong, E.H. Receiving Legion d'Honneur, 1919
Box 281 Folder 5
Group Photographs, undated
Box 281 Folder 6
Interior Views of Radio Apparatus, undated
Box 281 Folder 7
Major Armstrong and Professor Abraham, undated
Box 281 Folder 8
Major Armstrong, General Ferrié, and Professor Abraham of Sorbonne, [Hindenbreg] Chateau,, undated
Box 281 Folder 9
Tank Radio Apparatus, undated
Box 281 Folder 10
US Army Official Photos of Radio Apparatus, undated
Box 281 Folder 11
Swiss and French Mobilization
Yonkers, New York
Box 281 Folder 12
Armstrong, E.H. Visiting His Boyhood Bedroom Where In 1912 He Made the Discovery of Regeneration, 1947, 1912, 1947
Box 281 Folder 13
Billboard For United States Tires Mentioning E.H. Armstrong, 1921
Box 281 Folder 14
Dismantling of Radio Pole at 1032 Warburton Avenue--Includes correspondence from Bradley Hammond, 1935 August (includes negatives), 1935 August
Box 281 Folder 15
Re-Erection of Runyon tower At The Home of Frank A Gunther In Staten Island, New York, 1967 (includes correspondence), 1967
Box 281 Folder 16
Runyon Tower--E.H. Armstrong and Unidentified Individuals, 1946 January
Zenith Corporation
Box 281 Folder 17
FM Radio Assembly Line, undated
Box 281 Folder 18
FM Station W51C Studio--Office and Transmitting Apparatus, 1943 August 16
Lantern Slides
Alpine, NJ (duplicate)
Box 285 Folder 1-2
Armstrong, E.H. and Charley Fowler Wearing Homemade Ice Shields, 1941 January 18 (2 slides), 1941 January 18
Box 285 Folder 3-12
Armstrong, E.H. and Harry "The Rigger" Jorgenson on Turnstile Antenna, undated (9 slides), undated
Box 285 Folder 13
High Power Amplifier Shielded Behind Copper Screening, undated
Box 285 Folder 14-15
Osborn, Perry In the Control Room, 1941 September 29 (2 slides), 1941 September 29
Box 285 Folder 16
Pre-Construction Site, 1937 March 29
Box 285 Folder 17-30
Radio Tower--Including Air View, View of Base, View from Ground, View During Construction, undated (13 slides), undated
Box 285 Folder 31
W2XMN Building, undated
Box 285 Folder 32
Unidentified Individual on Radio Tower, undated
Apparatus
Box 285 Folder 33-49
Alpine, NJ--Including Early Model of Intermediate Stages, FM Apparatus, High Power Apparatus and Intermediate Power Stage Apparatus, undated (17 slides, duplicate), undated
Box 285 Folder 50
Antenna, undated
Box 285 Folder 51
Cables at Base of Pole, undated
Box 285 Folder 52-54
Empire State Building--Transmitters Installed by E.H.Armstrong, 1934-1935 (3 slides) (duplicate), 1934-1935
Box 285 Folder 55-61
Hartley Laboratory, undated (7 slides) (duplicate), undated
Box 285 Folder 62
[Regenerative Receiver Setup], undated
Box 285 Folder 63
[High Power Amplifier Stage], undated (duplicate), undated
Box 285 Folder 64-66
Predistortion, undated (3 slides), undated
Box 285 Folder 67
Radio Tower Antenna, undated
Box 285 Folder 68-73
Radio Set--Frank Eisemann FM, General Electric FM (duplicate)--Pilot FM and AM, Stromberg Carlson Console Radio, Zenith, undated (6 slides), undated
Box 285 Folder 74-76
Radio Set Including Headset and Microphone, undated (3 slides) (duplicate), undated
Box 286 Folder 1-15
REL--Frequency Modulation, undated (15 slides), undated
Box 286 Folder 16
Top of Radio Pole and Antenna, undated
Box 286 Folder 17-19
Westhampton, NY-- Armstrong Receiving Apparatus at the Home of George Burghard, undated (3 slides) (duplicate), undated
Box 286 Folder 20-23
Yonkers, NY-- W2AG, undated (4 slides) (duplicate), undated
Box 286 Folder 24-66
Unidentified, undated (43 slides), undated
Box 295
Glass Plate Negatives--4" x 5"
Box 295 Folder 1-2
Unidentified, undated (2 slides), undated
Box 287 Folder 1
Bull's Eye, undated
Box 287 Folder 2-21
Cartoons--Patent Lawyers, undated (20 slides), undated
Box 287 Folder 22
Color Image of Flower Vase , undated (duplicate), undated
Box 287 Folder 23-38
De Forest, Lee--Patent Application for Radio Signaling Systems, 1915 September 21 (16 slides), 1915 September 21
Box 287 Folder 39-41
Early Family and Childhood--"1032" Radio Pole, Early Radio Aerial, undated (3 slides) (duplicate), undated
Exhibit Showing Effect of Modern Static-Reducing Antenna
Box 287 Folder 42-43
Carnavon Signal at Riverhead, NY, 1926 April 27 (2 slides), 1926 April 27
Box 287 Folder 44-45
Recorder Tape Showing Diversity Effect, undated (2 slides), undated
Box 287 Folder 46-59
Exterior Views [Generator Plant], undated (14 slides), undated
Box 287 Folder 60
FCC-- Table of Sound-Video Reception (Which Appears Twice in 1945 Feburary 21 FCC Brief, Pages 15, 30), undated, 1945, undated
Figures
Box 287 Folder 61-68
Audion--Capacity Coupling, Circuit,Grid Current, Operating Characteristics, Wing Current, undated (8 slides), undated
Box 287 Folder 69-70
Block Diagram--Titled "Fig 1" and "Fig 2", undated (2 slides), undated
Box 288 Folder 1-6
Circuit Diagram-- Titled "Fig 1" through "Fig 4", undated (6 slides), undated
Box 288 Folder 7-8
Colpitta Circuit As Printed in the New York Herald Daily Hookup, 1924 March 22
Box 288 Folder 9
Energy Polar Diagram, undated
Box 288 Folder 10-33
"Frequency Modulation Signaling System," E.H. Armstrong Patent--Figures 2 through 14, 1940 December 17 (24 slides), 1940 December 17
Box 288 Folder 34
Percentage of Listening Hours During the Last Sunspot Cycle, undated
Plots
Box 288 Folder 35-36
Grid Current vs. Grid Voltage (2 slides)
Box 288 Folder 37
Hand-Drawn Sinusoid Showing Envelope, undated
Box 288 Folder 38-41
Hand-Drawn Block Diagram, undated (4 slides), undated
Box 288 Folder 42-44
Hand-Drawn Circuit Diagram, undated (3 slides), undated
Box 288 Folder 45-48
Percent Distortion R.M.S. of Correction Amplifier and Modulator (4 slides)
Box 288 Folder 49-50
Signal-Noise vs. Distance, 1939 September 25 (2 slides), 1939 September 25
Box 288 Folder 51-54
Square of A.C. Component of Telephone Current, undated (4 slides), undated
Box 288 Folder 55
Plaintiff's Exhibit--Antenna System at Poldhu, Cornwall in 1923, undated, 1923, undated
Box 288 Folder 56-59
Plate Tuning--Receiver Unit Tuning, Unit Transmitter, Distribution of Potential, Method of Keeping In Step a Two Unit Transmitter, undated (4 slides), undated
Box 288 Folder 60-72
Set of Lecture Slides--Experimental Setup, Cord and Tuning Fork, Circuit Diagram, Section of Cable, Plots, undated (13 slides), undated
Box 289 Folder 1-20
Slides Used With IRE Paper "Method of Reducing the Effect of Atmospheric Disturbances"--Figures 1 through 10, Circuit Drawings, 1927 October 5 (20 slides), 1927 October 5
Box 289 Folder 21-47
Slides Used With R.C.A. Paper "A Study of the Operating Characteristics of the Radio Detector and Its Place In Radio History"--Figures 1 through 19, A through D, Advertisement Featuring Seeley, 1948 (27 slides), 1948
Box 289 Folder 48-66
Slides Used with Technical Paper "A Method of Reducing Disturbances In Radio Signaling By a System of Frequency Modulation"--Figures 1 through 7, 1935 November 6 (19 slides) (includes original and final versions of figures), 1935 November 6
Box 290 Folder 1-43
Slides Used with Technical Paper "A Method of Reducing Disturbances In Radio Signaling By a System of Frequency Modulation"--Figures 8 through 34, 1935 November 6 (43 slides) (includes original and final versions of figures), 1935 November 6
Box 290 Folder 44-50
"The Super-Heterodyne"--Armstrong Paper Presented Before the IRE--Figures 2 through 6, 1924 (7 slides), 1924
Box 290 Folder 51
Radio Frequency Signaling Circuit, undated
Box 290 Folder 52-54
Relation Between EMF and Current-- +R -R, +R ) -R, +R=-R, undated (3 slides), undated
Box 290 Folder 55
Wave Propagation, undated
Box 290 Folder 56
Wave Intensity, undated
Box 290 Folder 57-62
Wireless Receiving System Patent 1,113,149--Inventor E.H. Armstrong--Figures 1 through 4, 1914 October 6 (6 slides), 1914 October 6
Box 290 Folder 63-74
"Some Recent Developments of Regenerative Receivers-- Armstrong Technical Paper--Figures 1 through 3,9 through 15, 1922 June 7 (12 slides), 1922 June 7
Box 291 Folder 1-5
Haddonfield, NJ-- Early Antenna for FM Reception, Receiving Antenna, 1934 June, 1934-1935 (5 slides) (duplicate), 1934, June, 1934-1935
Box 295 Folder 3-9
Hartley Laboratory-- Taken By J. Boldtman In the Presence of T.J. Styles, 1927-1933 (glass plate negatives--8"x11") (7 slides) (duplicate), 1927-1933
Box 291 Folder 6-7
Hartley Laboratory--Interior View, undated (2 slides) (duplicate), undated
Maps
Box 291 Folder 8-13
FM Broadcast Station Construction Permits Issued, Stations In Operation, Applications Filed But Not Yet Acted Upon by FCC,1941 March 15 (6 slides)
Box 291 Folder 14
Principal Radio Stations in New England and Road Map, 1940
Box 291 Folder 15
Alpine Tower Broadcasting Range, 1940 April 18
Box 291 Folder 16-17
Marconi Cape Cod Power Station-- Conical Antenna, undated (2 slides) (duplicate), undated
Box 291 Folder 18-19
Meeting Notes, 1935 November (2 slides), 1935 November
Box 291 Folder 20-21
New York Times Front Page--As Transmitted by Facsimile Over FM, As Published in Radio Today, 1936 April, 1934 November 24 (2 slides) (duplicate), 1934 November 24
Box 291 Folder 22-46
Oscilllograms--Regeneration, Station W2XMN Recorded at Andaulsia, Penna--Slides Marked 1 through 14, 1945 June 16, undated (25 slides), 1945 June, undated
Box 291 Folder 47-51
Palisades--View of the River, Unidentified, undated (5 slides, duplicate), undated
Box 291 Folder 52-53
PHILCO Radio Set Advertisement, 1941 (2 slides), 1941
Box 291 Folder 54-65
Pupin, Michael I--Lecture Slides 1 through 12, undated (12 slides), undated
Box 292 Folder 1-30
Pupin, Michael I--Lecture Slides 13 through 42, undated (30 slides), undated
Box 292 Folder 31
Radio Engineering Lab (REL)--Production Plant, undated (duplicate), undated
RCA (duplicate)
Box 292 Folder 32-36
Antennas at Radio Central, Apparatus, undated (5 slides), undated
Box 292 Folder 37-38
Alexandarson Alternator, undated (2 slides), undated
Box 292 Folder 39-42
Long Wave Towers and Receivers at Riverhead, undated (4 slides), undated
Box 292 Folder 43-46
Radio Central Building, undated (4 slides), undated
Box 292 Folder 47-48
Shortwave Receivers and Rack, Riverhead, Long Island, undated (2 slides), undated
Box 292 Folder 49-52
Switchboard at Central Office, Showing Foreign Stations, New York City, undated (4 slides), undated
Box 292 Folder 53-58
Transmitter Apparatus Used in Transoceanic Service, undated (6 slides), undated
Box 292 Folder 59-65
Radio Aerial--Including Unidentified House, undated (7 slides, duplicate), undated
Box 293 Folder 1-4
Radio Tower, undated (4 slides), undated
Box 293 Folder 5-13
San Bruno Point Wireless Station (9 slides)
Box 293 Folder 14-15
Schloemich and Von Bronk Patent--First Page, undated (2 slides), undated
Box 293 Folder 16-17
Solar Flares, undated (2 slides), undated
Superheterodyne (duplicate)
Box 293 Folder 18-29
Chassis, Four-Tube Layout With Loudspeaker, Original Receiver, Six-Tube Receiver, Interior View, Unidentified Man with Apparatus, undated (12 slides), undated
Box 295 Folder 10-15
First Version, Dismantled Receiver, Six-Tube Receiver with Speaker, undated (glass lantern slides, 8"x11", 6 slides), undated
Box 293 Folder 30-32
Tables-- London Television Voice Channel--Maximum and Minimum Field Strengths, Deerfield Receiving Station, undated (3 slides), undated
Box 293 Folder 33
Transmission Lines, undated
Box 293 Folder 34-37
View of Landscape, undated (4 slides), undated
Box 293 Folder 38-39
WWI--General Ferrie and Professor Abraham of the Sorbonne in France, undated (2 slides, duplicate), undated
Box 293 Folder 40-51
X-Radiograph--Coins, Feet, Hand, Lower Leg, Torso, undated (12 slides), undated
Yankee Network
Box 293 Folder 52-57
Mount Washington-- Engineer on Radio Pole, Inside of Antenna Coupling House and Coupling Equipment, Radio Pole, Building, Rime-Covered Radio Tower, undated (6 slides, duplicate), undated
Box 293 Folder 58-60
Radio Pole--Interior View of Apparatus, undated (2 slides), undated
Box 293 Folder 61-64
WDRC--Buildings and Radio Pole, 1939 (4 slides), 1939
Box 293 Folder 65-70
W1XOJ--Building, Car and Trailer, undated (6 slides), undated
Box 294 Folder 1-3
W1XOJ-- Radio Pole, undated (3 slides), undated
Box 294 Folder 4-5
W2XMN Building, Base of Alpine Radio Tower, undated (2 slides, duplicate), undated
W2XRA
Box 294 Folder 6
Radio Plots, 1945 July 28
Box 294 Folder 7
Comparison of FM Service Areas Available on 46 and 105 MC, undated
Box 294 Folder 8-9
Monthly Tabulation Sheet, 1945 August (2 slides), 1945 August
Box 294 Folder 10
W45CM--Gunther and Nafzger, undated (duplicate), undated
Box 294 Folder 11-13
WTMJ--Back of the Milwaukee Journal Radio Car, undated (3 slides), undated
Box 294 Folder 14-15
Yonkers, New York--"1032 Pole", undated (2 slides) (duplicate), undated
Box 294 Folder 16-35
Unidentified Individuals--With Apparatus, On Icy Radio Tower, Ski Slope, Radio Tower, Outside, In Shed, On Rime-Covered Radio Pole, In the Palisades, With Radio Apparatus, undated (20 slides), undated
Box 294 Folder 36
Unidentified Tangle of Wires, undated (duplicate), undated