BRASS CUP

$4.50

This traditional brass cup is designed to accommodate a hunk of galena rock to make a RF detector. The outer diameter is 5/8 of an inch. A tapped 4-40 hole is provided for on the side to accommodate a screw to secure the galena rock when placed in the cup. A second  hole is placed in the bottom of the cup to secure it to a chassis and provide for electrical connection at the base.