Cathode Synth 

@M.as.e Unknown chip blob, some caps, a transistor and some resistors.

Unknown chip blob? Like the ones from cheap children's toys?

@AlbySilly It's a chip, but it's surface mount with no markings and not perfectly rectangular, so blob-ish? PCB by Moffenzeef.

​@@timkaiserduluthwhy is it called cathode?

@robertmonroe9728 The original enclosure and meter were for a TV tube Tester. The label on the meter says, "Cathode Rejuvinator."