00000nam 2200000zi 4500 9.892812 CaOODSP 20230822135431 m o d f cr bn||||||||| 201023s1970 oncab ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn--- r------ Co24-3/7-1213-1971E-PDF Evans, W. M., author. A transportable low frequency communications system / by W.M. Evans. Ottawa : Communications Research Centre, 1971. 1 online resource (iii, 69 pages) : illustrations, map. text txt rdacontent computer c rdamedia online resource cr rdacarrier CRC report ; no. 1213 "National Communications Laboratory." "Published August 1971." "DRB project no. 7603." "DRB TELS report no. 6." Digitized edition from print [produced by Innovation, Science and Economic Development Canada]. Includes bibliographical references (page 28). "This report describes a highly portable, short-range, low-information-rate communications system and its associated electronics intended for use in the Canadian Arctic as a back-up to conventional HF systems. This low frequency system operates in the 100 kHz to 200 kHz band and employs an all solid-state transceiver capable of providing an output power in excess of 300 watts. The transmitting antenna is a 2000 foot dipole lying on the surface of the earth. One complete terminal for the system occupies about one cubic foot and weighs less than 50 pounds. Results of several trials conducted in the Canadian Arctic at widespread locations are given and it is shown that a range of at least 200 miles has been achieved in all cases. Expected variations in the maximum communications range are examined in view of the effects of ground conductivity on the antenna efficiency and atmospheric noise on system sensitivity"--Abstract, page 1. Issued also in print format. Mobile radio stations Canada. Mobile radio stations Canada, Northern. Stations mobiles (Radio) Canada. Stations mobiles (Radio) Canada (Nord) Communications Research Centre (Canada), issuing body. CRC report ; no. 1213. (CaOODSP)9.882492 PDF 2.11 MB https://publications.gc.ca/collections/collection_2020/isde-ised/Co24/Co24-3-7-1213-1971-eng.pdf