John Dunn
John Dunn
Areas of interest of the author: Supply Solar Analogue Design Measurement Audio Logic Power Light
Publications on RadioLocman by the author John Dunn:
- Peak power pointImagine that you have a voltage source in series with some source resistance feeding power to a...Mar 20, 2025
- The weed-eater circuitI would sometimes have to interview someone to fill an engineering position in "my"...Jan 13, 2025
- Quelling a ground loopAs shown in Figure 1, this issue had been previously addressed during pre-internet times in...Feb 1, 2024
- Linear opto-couplers and the loop gain 'booby trap'A power supply that I was examining used an opto-coupler in its feedback path for control of its...May 12, 2022
- Field Coil Speakers: Obsolete or the Future?As a youngster, I saw some really old radios; the kind that occupied highly-polished wooden...Aug 18, 2021
- Ex-OR Versus Ex-NOR: A Lucky Logic EquivalenceSome years ago, back in 2005 to be specific, the project was a power supply for a low Earth...Aug 18, 2021
- Why do You Never See Birds on High-Tension Power Lines?We very often see flocks of birds perched in trees, on rooftops, on local power line wires, and...Feb 25, 2021
- Speaker System Handles High Power without DistortionThere was an interesting article in the January 1961 issue of Popular Electronics, “Sweet...Jan 19, 2021
- Reduce switching errors in a quasi-resonant power converterI worked on a quasi-resonant energy converter, which in an extremely simplified form looked like...Mar 10, 2020
- LED bulbs can bring heatI had a CFL fail the other day at our upstate house but when I went to the local hardware store to...Mar 6, 2019
