University of Missouri, Columbia, Missouri.
Bachelor of Arts with Honors (Mathematics), 1948.
Bachelor of Science in Electrical Engineering with Honors, 1948.
Master of Science in Electrical Engineering, 1949.
Pennsylvania State University
Army Specialized Training Program, 1944-1946.
Graduate Study, 1949-51.
Purdue University
Doctor of Philosophy and Electrical Engineering.
Communications Engineering Major and Physics Minor, 1952.
His duties primarily related to the design and manufacture of the Wilcox Electric 807 VHF Transceiver. This is the first known VHF transceiver for large jet airplanes that incorporated electronic tuning, controlled by analog function generators that transform frequency settings into varactor bias current which, in turn, adjusts the capacitance of the tuned circuits to cause the filter band center to shift in response to the frequency input setting. Subsequently, this feature allowed the use of VHF reception in pilotless aircraft, with reception remotely controlled. His contributions to this project included the design of the antenna filter, the design of the frequency synthesizing system, the design of the function generator for producing the electronic tuning voltage, consulting with other design engineers on other parts of the design, supervising the environmental testing, analysis of environmental test results, and directing changes to upgrade the reliability of the transceiver.
In addition, he invented and patented a "digital squelch system", and was the principal inventor of the electronic goniometer circuit that was developed to replace the mechanical goniometer used in the VHF Omnirange electronic navigation system throughout the United States and elsewhere. This patented system eliminated such problems as bearing wear that degraded the accuracy of the mechanical system, as well as the requirement to mechanically file rotating capacitors during production to obtain the precision required for this vital part of the air navigation system. (The state of the art of varactors at the time this invention went into service precluded its use in the 50-watt omnirange system, but allowed its immediate application in 10-watt systems placed in service at small airports.)
His duties primarily involved:
His duties involved:
If you have any questions you can reach me at: johnwfield@aol.com