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Amateur Radio license mini-course, session 4

April 12 @ 15:45 - 16:45

Station Setup and Equipment – Transceivers: Integration of receivers, transmitters, and transverters for band conversion. – Receiver Specs: Importance of sensitivity for signal detection and selectivity for distinguishing close signals. – Amplifiers: Use of RF power amplifiers for transmitted signals and preamplifiers (or Low Noise Amplifiers) for received signals. – Mixers and Oscillators: Essential for converting and generating signals, with superheterodyne receivers highlighted for their stability and ease of design. Operating Stations – Mobile and Portable Stations: Discussion on the setup for vehicle-based and portable radio stations, emphasizing power supply considerations. – Digital Stations: Addresses wiring issues and grounding techniques, recommending ferrite beads for microphones and copper braid for RF grounding. Operating Controls – Audio and Frequency Controls: Covers microphone gain, squelch settings, variable frequency oscillators (VFO), and memory storage for frequencies. – Repeater Controls: Instructions on setting repeater offsets, understanding digital repeater channels (talkgroups), and internet-based radio operations (All-Star hotspots and Echolink). Common Issues – RFI (Radio Frequency Interference): Explains fundamental overload, harmonics, spurious emissions, RF feedback, and over-deviation as common RFI issues. – Neighbor Interference: Responsibilities of amateur radio operators to avoid interference with neighbor’s electronics, with solutions like band reject filters. Basic Test Tools – Multimeter Usage: Guidelines for measuring voltage, resistance, and soldering tips, distinguishing between acid-core and rosin-core solder for electronic work. Co-sponsored by: Penn State University-Harrisburg Student Government Association Room: E244 , Bldg: Olmsted , 777 W Harrisburg Pike, Middletown, Pennsylvania, United States, 17057