April 2022 Chapter Meeting

Chapter 22 will be hosting a Virtual Chapter Meeting on Wednesday, April 20th, 7:00 pm.  All are welcome to attend.

Click Here to Email a request for the Meeting Registration Link

7:00pm Chapter Business Meetings
7:30pm Presentation – Best Practices of Mitigating Lightning or Other Transient Voltage Surge Events” presented by Eric Shofner, Technical Support Specialist, Infinite Electronics

About the Presentation:

The presentation focus is:

  • Lightning Basics
    • Includes importance of Grounding
    • Defines Direct versus Induced Strikes and their unique impacts
  • The need for Surge Protection Generally & Generically
    • Main Entrance Protection vs Cascading (multiple) Surge Protection units installed
    • Surge Protection Sphere of Influence determining where to install the Surge Protector
    • Series Connected vs Parallel Connected Surge Protectors
    • Surge Protection Technologies Used
      • Non-Degrading Silicon Avalanche Suppressor Diode (SASD)
      • Metal Oxide Varistor (MOV)
      • EMI / RFI Filters (Not Surge Protection but Filters are useful)
    • Type 1 and Type 2 Locations per Underwriter’s Laboratory (UL) 1449 and IEEE Standards
      • Also, Motorola R56 Type 2A and Type 2B Locations & Technologies Required Standards (how they’re different from UL and IEEE Type 1 & 2)
    • Common Broadcast Engineer Questions and Responses
      • I have an older model Surge Protector that doesn’t seem to be working, what do I need to fix that?
        • This question usually involves an older Series Connected LEA International Brand Surge Protection Device
        • Response is to keep that in-place, and install a Parallel connected SPD to restore Surge Protection
      • Questions you might have about Surge Protection (generally)

About the Presenter:
Eric Shofner holds a BS and MA Degree from Regent University (Organizational Leadership).  Additionally, he has 29 Years Experience as a US Coast Guard Electronic Technician (ET), servicing Medium Frequency (MF), High Frequency (HF), Very High Frequency (VHF), and Ultra High Frequency (UHF) Coast Guard Shipboard Communications and Electronic Navigation Systems (X and S Band Surface Search Radars, Depth Sounders, Direction Finders, Radio Beacons, etc.) – 1979 thru 2008.

As a Coast Guard ET, Eric installed, maintained, and repaired Coast Guard electronic systems installed aboard ships, and at Coast Guard Shore Stations (Land-Based).  This included servicing and repairing Southern Avionics and Nautel Brand MF Radio Beacon Transmitters, Collins Brand 10kW HF Transmitters, Harris, Collins, & ITTMcKay Brand HF Receivers, etc.  Eric also led several ET Support teams aboard Coast Guard Ships and at various Shore-Stations, including at two Coast Guard Communications Stations (Kodiak, AK, and Point Reyes, CA).

Eric presently provides Technical guidance with Customers (both internal and external) about:

  • Surge Protection Function
  • Installation & Grounding Guidance
  • Troubleshooting Guidance
  • Assist with identifying the right Surge Protection Solutions (& to Cross CompetitorParts to PolyPhaser-Transtector Brand Parts) for the following Applications:
    • AC Input Power Protection
    • DC Input Power Protection
    • Data Protection (Ethernet, Telephone, Alarms & Automation, T1, etc.)
    • Radio Frequency (RF) Coaxial Protection

Customers Supported include: Industrial-Automation, Military & Government, Land-Mobile-Radio, TV-Radio Broadcast, Amateur Radio, Oil & Gas, Medical, Transportation, Telecom-Cellular, Residential, Utilities (Electric & Water-Wastewater), and Others.