Theremin: Thanks to mzdt I now have a working theremin! Well, insofar as any Jaycar Silicon Ship "theremin kit" is capable of producing a working theremin ... it's sold more as a home electronics kit than as an actual instrument, and various less-than-complimentary comments about its tone, sensitivity, interference issues, etc. are spattered across the internet. One site went so far as telling me that I shouldn't use it because I'd only get into bad theremin habits! Ha! Oddest thing -- I gain a significant improvement in tone and sensitivity (not to mention a more "theremin-like" response) by holding the power source (I'm using a 9V battery). I probably need to look at some diagrams in order to figure out what's going on there. Of course that means I don't have a hand free for the volume plate, but see above comments about sensitivity and interference for why that doesn't particularly matter.
Red leaves The scourge of my garden is back again. Young leaves that start red and stay red. The plant neither dies nor thrives, the leaves are undistorted but a bright red. It's clearly some sort of deficiency, but what? And why does it only take out some plants, while weeds and the like grow with undiminished enthusiasm?