ECEG 470/670
Communication and Information Systems
Fall 2025
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Web Links
The following links lead to web sites that have useful or relevant information for this course:
WebSDR Receiver Sites
ITU Table of Allocation of International Call Signs (ARRL Site)
United States Frequency Allocations Chart [(c) 2016 NTIA]
"Radio" vs. "Wireless" - A 1925 Perspective
Radar Band Letter Designations Chart
Image Rejection Mixers Information at Microwaves101 Site
Online Museum of E. F. Johnson Transmitters
Simple Superheterodyne AM Receiver (Circuit Digest article with schematic diagram)
Crystal Radio (Wikipedia)
Mouser Electronics
Mini-Circuits