::: VK4AMZ :::

Hello and welcome. I designed this web site to share with other Amateur Radio operators some of the projects that I have been working on. If you have a question or just want to say hi then I will gladly receive and answer emails.

In May 2008 I designed and built a 3 band HF copper loop antenna. This is now my only aerial and I would love to hear from others who have tried or are interested in this type of antenna or have any questions about this aerial or its construction - This will be an ongoing project with more updates and information to come including a full auto loop tuner with microcontroller software and circuit. Another will be the circuit for a Low cost combined RF bridge/1kW load which is a must for tunning the loop on frequency with little or no interference to others.

Except for the TS930s, Tec CRO, old AX-190 receiver and Marconi Spectrum analyser it is all home brew. I have a home brew all band HF rig that I am rebuilding the VFO's on. Other home brew gear in the picture: 0 - 100dB step attenuator (on top of Spec analyser), 40dB 250 watt power attenuator (on top of step attenuator), 100amp linear supply, 1kW output all band HF linear (3 x 4CX250B - I had a few so I thought why not), A combined Directional coupler - 1kW Dummy load and antenna balance bridge, 2 Tone pulsed generator, RF voltmeter, Loop antenna rotator controller and Loop antenna Tunning controller. A lot of the test gear on the work bench is also home brew.