Various projects, topics, and measurements
related primarily to amateur radio

The contents of this site are items that I have an interest in.  I believe I have used good engineering judgement and analysis based on a good education (BSEE and MSEE degrees) and 35+ years as a technical engineer in the communications, medical, and instrumentation industries.  I have tried to emphasize the engineering and technical aspects and to minimize opinions.  It is difficult to anticipate the technical level of those viewing this site and if there are questions, comments, or errors please contact me.
Page content last updated Mar. 27, 2014
Copyright 2008-2014 Larry Benko, W0QE
Brief Bio:


My original interest in radio was sparked through my grandfather who was an EE professor at the University of Pittsburgh and had a basment full of radios.  Additionally my father brought a Hallicrafters SX-28 home from Okinawa after WWII which we restored and I used as my first receiver.  I was initially licensed in 1964, while in junior high school, as WN3BLE in the Pittsburgh, PA area and later as WA3BLE.  I obtained my extra class license in 1967.  I later held the non-vanity call AC0B and finally the vanity call of W0QE.  I currently reside in Colorado.
New or recently changed items (may need to click refresh or reload in browser).
Simple RFI Generator in the RF Interference" section or click here (Mar. 27, 2014)

UHF Connector Need for Compensation in the "Tech Topics" section or click here (Nov. 13, 2013)

Presentation on "Electronic Design for the Hobbyist" which was presented to the Boulder Amateur Radio Club in Feb. 2013 in the "Papers and Presentations" section or click here (Feb. 7, 2013)

Tests on Small Signal Relays at RF Frequencies in the "Tech Topics" section or click here (Oct. 29, 2012)

Video on "Understanding Transmission Lines" which is 86 minutes long and available in 2 resolutions.  Available in the "Papers and Presentations" section and in 2 resolutions.  Click here. (Aug. 14, 2012)

Relay Operate/Release Time Tester in the "Tech. Topics" section or click here (Jul. 20, 2012)

Heatsinks Without Fins (Dummy loads) in the "Projects" section or click here (Jul. 9, 2012)


Field Day Phase Noise & Overload Testing update in the "Tech. Topics" section or click here (Jun.27, 2012)

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