Mark Two 80/40 QTC loop antenna

The original experimental QTC transmitting loop antenna was built in late 1990, tested immediately, and details were published in the June 1991 issue of this magazine. The design raised a lot of interest and a number of fellow amateurs in both the UK and the USA advised the author that they were apartment dwellers (no outdoor antenna possible!) and were going to construct it. Others asked whether a two-band 80/40 metre (3.5-7.0 MHz) version was feasible. That request is answered in this article.