Electric Kiln
This is a 240 volt potty kiln I picked up at the local
flea market for $78.  It is much larger then I wanted,
but for the price I can't complain.  It costs about $1
per hour to run at full temp, with a max temperature
of 2300 F.  Picture below shows one slightly red
crucible ready for a pour.  I have had all three of my
crucibles in it at once with room for a few more.  
Very nice for large pours.