100 years 100 innovations

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On Dec. 24, 1906, Reginald Fessenden transmitted an audio broadcast of spoken voice and music to a few listeners. It was a broadcast in that it was not meant as a point-to-point message. Since then, radio has grown in its scope and coverage, and the technology used to create it has provided the tools to improve it and allow it to extend beyond the traditional airwaves.

Last month, we profiled the event and the innovator. This month, we detail the top 100 technical innovations that have influenced radio, as nominated by you, the reader, and organized by a panel of radio broadcast engineers. The entries for 100 through 21 are listed alphabetically. The top 20 are ranked in order. You may feel that we left something out or that something is not being given the ranking that it deserves. If so, tell us about it at radio@penton.com.
Chriss Scherer, editor

Technology descriptions by Doug Irwin

100 to 21*

* These are in alphabetical order.

45 rpm record AES3 AM directional antennas
AM top loading Ampex 200A Ampex 350
Audio over IP Audio Precision System One Axia Livewire
Broadcast Electronics FM30 folded-wave RF amplifier Burk ARC-16 Carbon mic
Circular polarized FM antenna Coherer radio detection circuit Comrex frequency extender
Condenser mic Crystal oven Crystal-controlled oscillator
Denon DN-950F Dielectric switchless FM combiner Digidesign Protools
Doherty amplifier Dolby noise reduction Dorrough DAP
Dorrough Loudness Meter Edison Phonograph Editall splicing block
Electrolytic Barretter Electro-Voice RE-20 Emile Berliner flat-disk recorder
Eniac Eventide BD955General Electric transistor console
Gramaphone disk recorder Hallikainan and Friends TEL-171 Harris MW-1
HD Radio High-impedance bridging Integrated circuit
ISDN codec ITC 99 Kahn Communications AM stereo
Magnetic tape Magnetophone Mechanical computer
Mid-level (split-level) combining for HD Radio Modulation Sciences CP-803 Modulation Sciences Sidekick
Moseley DSP-6000 Moving-coil dynamic speaker Multitrack tape
Op amp Optical recording (CD-R) Orban Optimod 8000
Orban Optimod-FM 8200 Paper recording tape PDM
Phantom power Potomac AG-51, AA-51 POTS codecs
Prime Image Cash and 25-Seven ATM QEI Catlink QEI solid-state FM
Reed-Solomon Reel-to-reel tape technology Shafer automation
Shure 55 Solid-state memory cards Spread-spectrum technology
Stereo patent (Blumlein) TDM audio routers Teletronix LA-2A
Telos 10 USB Voltage-controlled amplifier
Windcharger towers Wire recorder (telegraphone)  

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