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This month's (December 2018) giveaway is a piece of junk. Or rather, a battered and beaten "historical artifact." It's a Philco oscilloscope from 1946. The manual, including schematic, is here. I picked it up on eBay a few years ago, and while it's kind of cool, have no real use for the thing. It powers up and displays a distorted waveform, usually, but is pretty much good for nothing other than as a desk ornament. I wrote about this here. (The thing is so old I'd be afraid to leave it plugged in while unattended). Enter the contest here.

The Write Only Memory was a fake part Signetics introduced April Fool's day many decades ago. It's a hoot. Here is page 1, and this is page 2.