Just a shot in the dark here; mostly for fun I picked up a really cheap/inexpensive mic - an HDW203 - from Craigslist. It was a tiny brand that doesn't seem to exist anymore: HDW microphones, (Chinese imports) run by a guy named Hans Washburn. (Might even be an alias?) Any, I actually got this faux u-47 for a movie prop, but it actually works, has a nice case, power supply, remote pattern controller, and decent shock mount. The only thing I found on the web is a dusty old link (from 2008) here: (dead Link Removed) I tried emailing him at the address on this website, but it bounced back as no longer working. I'm really just looking for schematics; I'm attempting a few mods on it just to have some fun, learn about the tube circuitry inside, (swapping out the 12Ax7 for a 12AY7, and adding an upgraded RK-12 capsule from MicrophoneParts.com.) I see they (HDW) sold some stereo ribbon mics and some generic small/pencil style condenser mics...but nothing since 2008. Anyone have any experience with these?