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General Membership Meeting, Aug 13, 2021


WA8AHZ

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Join the Club’s Regular General Meeting starting at 7:00 pm, via Zoom Meeting.  The Zoom link is:    https://us02web.zoom.us/j/83906871573?pwd=V3l1UkZmSGZObGI5YkhLbGFYRzRUZz09   

 Forum – “Amateur Radio RF Exposure” Join the ARRL Learning Network pre-recorded presentation on Amateur Radio RF Exposure, by Dan Brown, W1DAN. Dan is the Eastern Massachusetts ARRL Section Technical Coordinator, and President of the Wellesley Amateur Radio Society.  In May, the FCC issued a new Rule and Order eliminating the decades-long “categorical exclusion” for mandated RF exposure calculations for most Amateur Radio stations.  Effective May, 2021 Amateurs must conduct detailed calculations of RF exposure for both controlled and uncontrolled environments, and have the calculations on file in the shack. After Dan’s presentation, there will be a short discussion.  Time: 7:00-7:30 pm

Main Program -- “Mitigating Residential Heating, Ventilation and Air Conditioning (HVAC) RFI (Radio Frequency Interference)”  The mandated use of high-efficiency DC motors in HVAC systems poses new challenges for RFI mitigation in the Amateur Radio bands.  In this presentation, VWS member Roger, KM4LHZ along with Steven, W9SAN of the Fort Wayne (IN) Radio Club will explain the physical basis for these phenomena, present brief case studies in RFI mitigation, and discuss some common myths regarding HVAC RFI. Considerations for purchasing a new HVAC system will be given.  Roger experienced this issue first-hand when he recently updated his home HVAC system, and Steve is an electrical engineer at the Regal Beloit Corporation, specializing in RFI issues.  Time: 7:30 – 9:00  pm

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