Development of Preselector Units Covering the Frequency Ranges 85 to 180 Mc, 175 to 355 Mc and 350 to 700 Mc.
Abstract
Problem S499R-C was set up at this Laboratory by the Bureau of Ships in order that improved preselector heads could be developed to replace the TN type used with the Models AN/APR-1, AN/SPR-1, and RDO radio receiving equipment. Three units were developed, through not completed, covering the frequency range of 85 to 700 megacycles. Sensitivities of the order of 2 to 18 microvolts and image rejections of 21 to 80 decibels were obtained with hand-made circuits. A "modified" butterfly type of circuits was used, which, it is believed, is satisfactory in this range of frequencies
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 19, 1946
- Accession Number
- AD1202736
Entities
People
- F. C. Isely
- M. F. Davis
Organizations
- United States Naval Research Laboratory