The March/April 2017 issue of QEX will be arriving at mailboxes soon. In this issue . . .

•    David M. Drumheller, K3WQ, explains how to model antennas made from angle stock, wires cages, tape measures and other unconventional conductors.

•    Rick Peterson, WA6NUT, shows how FDMA technology can be used for new sound card modes.

•    Brian Machesney, K1LI, and Tony Brock-Fisher, K1KP, use polar modulation to to implement a “linear amplifier”.

And much more! If you're not a subscriber, you're missing some of the best Amateur Radio technical journalism available. Subscribe now at https://www.arrl.org/qex-subscription-form. Click here to see the table of contents for this issue and download a free sample article.