The apples have ripened enough and we have picked a small crop.
Hams talk at length about baluns but rarely in quantitative terms.
A quotation from Lord Kelvin is most appropriate:
When you can measure what you are speaking about, and express it in numbers, you know something about it. But when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind. It may be the beginning of knowledge but you have scarcely in your thoughts advanced to the state of science. Continue reading Baluns – show me the numbers
This article documents the build of a TNC-X, a basic KISS only TNC using modern components, including option of an on board USB interface.
Above, the PCB after assembly and cleaning. Continue reading TNC-X build
I built a X450 quadcopter (X450-02 quadcopter (21/05/2014 build) which proved to be difficult to tune, principally the Level control loop, though there were issues with Roll and Pitch. Continue reading A quadcopter tuning story – symmetry is important
Readers of (How) does this balun work? have asked about the meaning of the terms Current Balun and Voltage Balun. The following is a cut and paste from my old site.
Definition: Current Balun, Voltage Balun
The terms Current Balun and Voltage Balun are often used. This article explains the key characteristics that determine which best describes a particular balun. The approach taken is to charaterise a balun because of how it behaves externally rather than the internal implementation. Continue reading Definition: Current Balun, Voltage Balun
This article discusses the concept of circuit Q, its application for antennas and assessment of antenna Q. Continue reading Antennas and Q
With the forced end of the VK1OD.net website, some builders of the Roger Beep kit may be without documentation.