CT-1 RF Probe kit in a test tube*Price: $12.00
Here is a small easy to assembly RF Probe kit using through hole parts. Everything you need to build a compact ** W5USJ APPROVED ** RF Probe comes packed into a screw top test tube.
*OK, for those anal correctionists, it is really a centrifuge tube but it looks like a test tube! I couldn*t find any test tubes with screw tops...so there!