Stone Vintage Radio Museum - Antique Radios, Wireless, Crystal Sets, Tubes, and Valves

Pictures above is the Massie Wireless Telegraph Radio Coherer It is located at The New England Wireless and Steam Museum in Rhode Island; They gave permission for the use of the photo. It is a very early radio detector. Pictured at the left is a vertical glass tube. Inside there is a magnatized needle and metal filings. When a radio signal is received, the filing clump together. The door bell (minus the bell) was used to knock the filings apart after they cohered when the radio signal was received.

Unless otherwise noted, all materials contained on this web site are copyright protected. Materials may be downloaded and/or reprinted for personal use only. Permission to reprint or electronically reproduce any document or graphic in whole or in part for any non-personal or commercial use is expressly prohibited unless prior written consent is obtained from the respective copyright holder(s).