October 7, 2021 Club Meeting
Thursday, October 7, 2021 at 7:00 PM Via Zoom. Login sent via email or upon request.
Program: RF Exposure Evaluation / On-line Calculator, Tom McDermott, N5EG
The FCC adopted RF Exposure requirements for different services many years ago. Until recently Amateur Radio operators had some blanket exceptions that avoided the need to run the calculations. The FCC recently removed the blanket exceptions, and all Amateur Radio stations need to conduct RF Exposure evaluations for their operating situation.
The presentation will cover:
- Basics of RF fields: field strength and power density.
- Absorption vs. frequency.
- Exposure category.
- Some key parameters needed to conduct an evaluation.
The ARRL has put an RF Exposure tool on their website that makes this a simple and straightforward process. A couple parameters from above are needed for input to the ARRL tool.
Other tools are also available, such as 4NEC2 which contains an MPE (Maximum Permissible Exposure) graphical presentation if you have or want to construct an NEC (Numerical Electromagnetic Code) model of your antenna. But this level of analysis is seldom necessary. The club has used the 4NEC2 MPE tool for previous Field Day calculations showing that the operations were in full compliance with the FCC requirements. Besides, 4NEC2 makes colorful charts.
Biography: Tom, N5EG is the club newsletter editor and membership database administrator.
Announced in the October 2021 issue of The Repeater.
Meeting Notes
From the November 2021 issue of The Repeater.
RVARC Meeting Minutes October 7, 2021 7pm
Meeting venue: zoom, max attendees: 12
No Treasurer’s report this month.
7:08pm. Don Bennett, KG7BP, reported that in-person license exams may be able to resume in the near future. Contact him for updates.
Pat, KD7MPA, reported on the successful swap meet in Grants Pass.
7:15pm. Fred, AE7IM, announced that he is speaking at Pacificon, Oct 15-17, in San Ramon, CA on the subject of “Programming your Rig”.
7:20pm - 7:50pm. Tom, N5EG, presented tonight’s program: The ARRL online tool for FCC RF Exposure Calculation.
Link to the ARRL on-line tool: http://arrl.org/rf-exposure-calculator
Tom’s presentation is on our club’s website at: https://k7mfr.org/files/RF-Exposure-Evaluation.pdf
7:56pm Pat requests input on what members would like for next month’s program.
7:59pm meeting adjourned, some free discussion followed regarding DXing, possible holiday swap meet, AB577 mast info, 2022 Field Day perhaps being at same location as 2021 FD.
8:36pm zoom meeting end
John, KF7UMK, Secretary.
