Scott Helmke’s “Alice” is a small-diaphragm condenser DIY microphone project.  The latest revision, “Audrey,” uses a Transound TSB-165A electret-condenser element.  A schematic, bill of materials, and building notes are available on Mr. Helmke’s website.

Notable Features:

• Built into a 1″ copper water pipe
• Uses a Transound TSB-165A capsule

Price: No products available

More info at Scott Helmke’s personal website.