Future plans include building a magnetic loop antenna as these should be more robust to noise. There are lots of online plans of home built magnetic loop antennas like this one: http://www.vlf.it/feletti2/idealloop.html

A magnetic loop antenna is basically a hand wound inductor with a matched capacitor so an LC circuit. I have some old variable capacitors ready for this that I bought from Thailand on Ebay. They probably came out of some old radios.