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History of the radio manufacturer Philbrick Researches, George A (GAP/R).;


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Name: Philbrick Researches, George A (GAP/R).;    (USA)    
Abbreviation: philbrick  
Products: model-types  
Summary: George Arthur Philbrick built the first commercial Operational amplifier, the K2-W.

 
History: Some text from Joe Sousa in www.PhilbrickArchive.org:
The first commercial Operational amplifier was the K2-W op-amp. It was based on the amplifier used in the Philbrick modular Analog-Computor "black boxes ". That amplifier's basic circuit architecture, in turn, was probably inspired by an earlier amplifier designed by Loebe Julie (Dan Sheingold and Bob Pease, thanks for helping me with this information). The K2-W Operational Amplifier entered the commercial market in 1952. It performed mathematical Operations in analog computers. Soon after, the K2-W and its successors saw wide application in industry. The Analog Computer was one educational vehicle to familiarize the engineer and the engineering student, with Operational Amplifier techniques. GAP/R also took on a crucial educational leadership role with application guides and tutorials.

Over time, GAP/R was bought and sold, and existed under different names: Philbrick-Nexus, Teledyne Philbrick, Teledyne semiconductor, and currently TelCom Semiconductor.

     

Some models:
Ctry  Year  Name  1st Tube  Notes
USA  53  Dual Power Supply R-100B   12AU7  Output +/-300 VDC, adjustable. 
USA  52  K2-W Operational Amplifier   12AX7A  Philbrick Researches, George A (GAP/R);
Operational Amplifier model K2-W for Analog C... 
USA  52 / 53 K2-P Operational Amplifier   12AX7  1 tube and one Chopper Airpax A175. 

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Further details for this radio manufacturer by the members (rmfiorg):


 
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