In addition to experimenting on the 1750 M and 600 M bands, I'm also active on the Broadcast Band, DXing with hi-tech crystal sets that I have built from scratch.
Building sets of any type is fun, but there's something special about a radio that gets all of its power from the antenna its hooked to. No active devices nor any
external power from batteries or the mains.

I also like to experiment with High Voltage. I've built several Tesla coils, including my 3 KVA input coil which can emit multiple 4 foot streamers! Have a look at:

http://www.hurontel.on.ca/~weazle

73, J.B.