This article describes my trials and tribulations towards building, and understanding, the Cobwebb antenna.The first thing to note is that there are two closely related designs; the original Cobwebb (note the double-b) that uses folded dipoles with matching stubs, and the Cobweb (single-b) that uses...
This post describes my attempt to build a low cost, low weight, hex-beam antenna for field day use. The intention being to suspend it from a high tree branch in a park.Part 1 covers the construction details such as materials and dimensions and the initial...
This article describes my DIY attempt at building a manual antenna tuner. This is based on the plans for the ZM-2 tuner as sold by Emtech. My version suffers from considerable parts substitution, as I was building from whatever components I had available that seemed "near...
This post describes the build and test for a quad-band folded skeleton sleeve dipole antenna. For more detail on the design of the folded skeleton sleeve antenna, refer to my previous post. I wanted a quad-band dipole for 40, 20, 15, and 10M. I expected the 40M...
Recently I saw someone online mention the Folded Skeleton Sleeve antenna. This was a design that I'd not previously encountered, so my curiosity was piqued. The design includes two elements, the first (low band) is a partially folded dipole that is connected in the centre to...
A 'Track and hold' External VFO for tuning older ('boat anchor') radios by Jim Sosnin VK3JST...
This post describes the design and construction of a small manual z-match antenna tuner to compliment the (tr)uSDX transceiver. The (tr)uSDX is a small, inexpensive, QRP transceiver designed by PE1NNZ and DL2MAN. It is available as a kit or can be ordered pre-built. It has approximately...
The QDX is a 5W, 4-5 band (80, 40, 30, 20, and 60) transceiver that's manufactured by QRP Labs. It's available in kit form with the SMDs and ICs pre-soldered or fully assembled.It has a number of interesting features, not the least of which is...
Locking the Icom IC-9700 with the Leo Bodnar GPS locking system ...
This is a simple "fox" transmitter and yagi/receiver that I built to use with our Scout group. It's designed to be very low cost (<$20), simple to construct, and robust enough to survive the rough and tumble of being handled by youth. The main components of the...