Narrow Results By:

• RCA Radiotron (6)
• Radio Corporation of America (4)
• Sylvania Radio Tubes (4)
• Cable Radio Tube Corporation (3)
• Ken-Rad Radio Tubes (3)
• De Forest Radio Company (2)
• Arcturus Radio Tube Company (1)
• Eimac Tubes (1)
• Federal Telephone and Radio Corporation (1)
• French Battery Company (1)
• Grigsby-Grunow Company (1)
• Hygrade Lamp Co. (1)
• Jefferson Electric Manufacturing Co. (1)
• Raytheon Manufacturing Company (1)
• Sylvania Products Company (1)
• Tung Sol Products (1)
• Tung-Sol Electronic Tubes (1)
• Tung-Sol Lamp Works Inc. (1)
• Westinghouse Electric & Manufacturing Company (1)

• Radio Tubes (33)
• Sylvania Emurgentcy Kit (Radio Tubes) (1)
• Tube Rejuvenator (1)

• 1929 (14)
• 1928 (5)
• 1931 (5)
• 1930 (4)
• 1946 (3)
• 1927 (2)
• 1925 (1)
• 1945 (1)

• Saturday Evening Post (17)
• Literary Digest (5)
• Collier's (4)
• Liberty (3)
• Time (2)
• Canachian N.J. (1)
• Communications (1)
• Country Gentleman (1)
• Radio Amateur Call Book (1)

• Radio (35)
• Radio Tubes (35)
• Testimonial (4)
• Radio Programs (3)
• Contests (2)
• WABC and Columbia networks (2)
• A.A. Howard, pres. Howard Radio (1)
• C.B. Smith, pres. Stewart-Warner Corp. (1)
• Charles Edison, pres. Thomas A. Edison, Inc. (1)
• Children (1)
• RCA Hour (1)
• S.W. Gilfillan, pres. Gilfillan Bros. Inc. (1)

• "I wonder why..I never thought of this before" (1)
• 7 2/5 Miles "As Fast As Lightning" That's The Speed Of Radio (1)
• A Radiotron for Every Purpose (1)
• A chip off the OLD BLOCK (1)
• A radio set is as old as its tubes. (1)
• Better reception this season than last! (1)
• C.B. Smith (1)
• Charles Edison (1)
• Electronics...Basic strategy for stable profits (1)
• Every Radiotron is tested and inspected in 41 different ways before it is approved... (1)
• Federal's vast Tube-Making Experience (1)
• For sparkling, vivid Colorful tone insist on Majestic matched Radio Tubes (1)
• Genuine Radiotrons (1)
• Howard Radio recommends RCA Radiotrons (1)
• It Depends on the TUBES You Use (1)
• Make sure that your new radio set is equipped with RCA Radiotrons throughout... (1)
• Masterpieces of Precision (1)
• Millions upon millions of lamp bulbs and Radio Tubes You Can Trust.. (1)
• Nationwide broadcasting, for audiences of millions, has been made possible by the development of RCA Radiotrons... (1)
• Put in KEN-RADS... The First Step to Good Reception (1)
• RCA Radiotrons have been imitated in appearance, shape and size--in everything but the main thing--dependable performance. (1)
• Ray-O-Vac Radio Tubes Make A Good Program Better (1)
• See that he brings SYLVANIA TUBES when he comes to repair your set (1)
• Speed, Symbol Of Progress (1)
• Speed... 186,284 Miles A Second... The Speed of Light (1)
• Standard Quality - PLUS (1)
• Thanksgiving (1)
• The Great Caruso was on the air... but only a hundred people listened... (1)
• The Tubes you want with the Quality you demand! (1)
• They Belong to each other... The Perfect Harmony of First Love isn't closer than the way these new set-tested tubes fit your radio... (1)