Test on Telegraph Key and Sounder Equipment J.H. Bunnell Company, Exhibitor
Abstract
The keys and sounders were set up at this Laboratory and connected in accordance with diagram shown on Bureau drawing CA 39 S-65-403 - Alteration 3, Circuit KS. They were then carefully observed for their operating characteristics while under test for compliance with the specifications. In view of the keys and sounders complying with all of the major requirements of the specifications, reference, and additional tests given by this Laboratory, it is recommended that they be approved for the Naval Service, subject to comments in this report. Inasmuch as this type of key and sounder requires 6 volts, direct current, for operation, it is suggested that where alternating current is available the Bureau consider the use of small transformer rectifier units, as a substitute for battery supply. The full wave rectifier unit used on this test was a Westinghouse "Rectox", copper oxide, style 598134, rated 10 volts, 1 ampere, d. c. output. Copper oxide units can be obtained from several manufacturers in a variety of ratings and protected against sprays and high humidity. The Westinghouse Company states that life tests lasting six years have failed to show any limitation in the life of the rectifying elements of their rectifier units.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 12, 1935
- Accession Number
- AD1147442
Entities
People
- W. B. Sr Roberts
Organizations
- United States Naval Research Laboratory