Side note: Parts Express is owned or afilliated with Mendelson's Liquidation Outlet in Dayton, Ohio. If you have never been to Mendelson's before, it is a wonderful, magical place They have an entire warehouse floor of surplus electrical and electronics junque, and an entire room dedicated to tubes. You can order some of their stock online but most of it is so unorganized you have to go there and dig for treasure.

To get up to the third floor where all the electronics are, you have to take a freight elevator that's operated by one of the older owners of the store. He just sits there and runs the elevator up and down while reading magazines. It's wild.