What is it? I bought the item shown below from a friend that had bought it earilier in the morning at the 2005 CC-AWA Charlotte Conference. It clearly is some type homebrewed or lab built test equipment. The front panel mounted tube socket makes me think of a tube tester. If you have any ideas, please sign-in to the guestbook and let me know what you think it is.

This push button selects windings of this coil

This tap switch selects different caps. in this stack