Bio: Bob Brehm, AK6R is Chief Engineer of Palomar Engineers (www.Palomar-Engineers.com), and has been a ham for over 50 years with experience in contesting, RTTY, Amplitude Modulation, vintage radio restoration, boat anchors, linear amps and unique antennas. He is active on 3.870 AM and 3.895 Vintage SSB, the Saturday swap net on 7.240 as well as other nets offering his expertise to new and old hams alike.
Bob Brehm is often asked to speak at conventions and radio club meetings about RFI, antenna matching, using baluns, stealth antennas, amplitude modulation, RTTY/digital modes, ESSB, ham radio on boats, and a variety of other subjects. If your group of 20 or more participants would like a personalized presentation, please email Bob at ak6r@palomar-engineers.com with suggested dates and some background on the group.
ABC’s of RFI for Hams Snyopsis
Is your transmitter the SOURCE of RFI affecting electronic devices in your own house or your neighbor’s house? Would you like to find a quick and easy solution so you can have more time to operate and enjoy ham radio rather than troubleshooting RFI issues?
Are you the VICTIM of RFI from your own electronic devices or from devices in your neighborhood? Do you want to reduce your receiver noise floor so you can hear local contacts and more DX?
If you answered YES to either of these questions, then you should attend this presentation where you will learn how to make ham radio more enjoyable by eliminating problems caused by RFI.
Topics include:
- Learn fundamentals of RFI – identify symptoms, pinpoint causes & apply simple cures
- What’s a ferrite and how to choose & buy the right ferrite for your RFI issue
- How to use ferrites to solve the #1 RFI problem shared by all hams using HF radios
- How to choose and use ferrites to solve transmitter RFI problems in your home or neighborhood
- How to choose and use ferrites to reduce receiver noise and hear more DX
During the presentation you will see many examples of feed line chokes, baluns, ununs, and various practical applications of ferrites for AC/DC power lines, computer interconnect cables, transceivers, linear amplifiers, home theater systems, etc.
Bring your questions and pay attention to win one of the prizes at the end of the talk.
Bob Brehm, AK6R
The RFI Guy
RFI Presentation Handouts:
Ham Radio RFI Solutions Cheat Sheet – Ham Radio RFI Solutions Cheat Sheet
QUICK and EASY RFI Solutions for Consumer Electronics –RFI Tip Sheet #3D – Consumer RFI
Need help in choosing a common mode choke for your application? Read: Choosing a Feed Line Choke
End Fed Antenna Secrets for portable, emergency and permanent installations
Learn how to select, choose and setup an end fed antenna system that works on multiple bands, is stealthy and radiates well at low heights. Find out the secrets of antenna matching, reducing RFI and minimizing noise present on many end fed antennas. Sample antennas will be available to see and touch and ask questions.
End Fed Antenna Secrets Handout:
MORE info on BULLET antenna: Bullet End Fed Long Wire Antenna Typical Configuration Notes-03192023
Past speaker presentations and future presentation schedule
(Click on Event Sponsor Logo/Name for more info):
Palomar Amateur Radio Club – 11/01/2023
Power Point Slide Show: ABCs of RFI for Hams – PARC 11012023
PDF Download: ABCs of RFI for Hams – PARC 11012023
Delaware Valley Radio Association – 10/11/2023
Power Point Slide Show: ABCs of RFI for Hams – DVRA 10112023
PDF Download: ABCs of RFI for Hams – DVRA 10112023
San Diego Hamfest 10/7/2023
Power Point Slide Show: End Fed Antenna Secrets and much much more LAKESIDE 2023 HAMFEST- 09272023
PDF Download: End Fed Antenna Secrets and much much more LAKESIDE 2023 HAMFEST- 09272023
North Highland Hills Radio Club – 08/28/2023
Power Point Slide Show: End Fed Antenna Secrets and much much more Henderson ARC 08222023
PDF Download: End Fed Antenna Secrets and much much more Henderson ARC 08222023
Henderson ARC – 08/22/2023
Power Point Slide Show: End Fed Antenna Secrets and much much more Henderson ARC 08222023
PDF Download: End Fed Antenna Secrets and much much more Henderson ARC 08222023
CQ Blind Hams – 08/10/2023
Power Point Slide Show: End Fed Antenna Secrets and much much more 08102023
PDF Download: End Fed Antenna Secrets and much much more 08102023
Audio Podcast HERE
San Diego DX Club Meeting – 5/24/2023
Audio Link of Meeting With Speaker
Power Point Slide Show: End Fed Antenna Secrets – SDDXC 05252023
PDF Download: End Fed Antenna Secrets – SDDXC 05252023
FLEX RADIO HAMVENTION DINNER – May 19. 2023
Power Point Slide Show: ABCs of RFI for Hams – FLEX-RADI0 Hamvention 2023
PDF Download (includes extra slides): ABCs of RFI for Hams – FLEX-RADI0 Hamvention 2023
SUNLIFE Amateur Radio Club
Power Point Slide Show: End Fed Antenna Secrets – SUNLIFE ARC 1022023
PDF Download: End Fed Antenna Secrets – SUNLIFE ARC 1022023
Billerica Amateur Radio Society
Power Point Slide Show: ABCs of RFI for Hams – Billerica ARS 12072022
PDF Download: ABCs of RFI for Hams – Billerica ARS 12072022
Chippewa Valley Amateur Radio Club
Power Point Slide Show: ABCs of RFI for Hams – Chippewa Valley ARC 10042022
PDF Download: ABCs of RFI for Hams – Chippewa Valley ARC 10042022
Power Point Slide Show: ABCs of RFI for Hams – Le DeForest ARC 09212022
PDF Download: End Fed Antenna Secrets – Bears Zoom 09292022
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Power Point Slide Show: End Fed Antenna Secrets – Lakeside ARC Hamfest 09242022PDF Download: End Fed Antenna Secrets – Lakeside ARC Hamfest 09242022 |
Le DeForest ARC9/21/22 |
Power Point Slide Show: ABCs of RFI for Hams – Le DeForest ARC 09212022PDF Download: ABCs of RFI for Hams – Le DeForest ARC 09212022 |
POWERPOINT SLIDE SHOW:End Fed Antenna Secrets – Blind Hams 07212022
PDF DOWNLOAD: End Fed Antenna Secrets – Blind Hams 07212022
POWERPOINT SLIDE SHOW: ABCs of RFI for Hams – Valley of the Moon ARC 07222022
PDF DOWNLOAD: ABCs of RFI for Hams – Valley of the Moon ARC 07222022
Powerpoint: End Fed Antenna Secrets – Kamiah Idaho Hamfest 04232022
PDF: End Fed Antenna Secrets – Kamiah Idaho Hamfest 04232022
PowerPoint:End Fed Antenna Secrets – MARCA INC 04192022
PDF:End Fed Antenna Secrets – MARCA INC 04192022
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ABC’s Of RFI for Hams |
Powerpoint:End Fed Antenna Secrets – Alexandria Radio Club 04082022 |
PDF: End Fed Antenna Secrets – Alexandria Radio Club 04082022 |
Santa Clarita Radio Club
San Gorgonio Pass Amateur Club (SPARC)
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End Fed Antenna Secrets10/6/2018 |
| End Fed Antenna Secrets – San Diego hamfest 10062018 Update | End Fed Antenna Secrets – San Diego hamfest 10062018 Update |
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5 Quick and Easy RFI Solutions9/22/2018 |
| 5 Quick and Easy RFI Solutions – PAPA System | 5 Quick and Easy RFI Solutions – PAPA System |
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End Fed Antenna Secrets8/1/2018 |
| End Fed Antenna Secrets – PARC 2018 | End Fed Antenna Secrets – PARC 2018 |
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Quick and Easy RFI Solutions |
| Quick and Easy RFI Solutions – ARCEJ | Quick and Easy RFI Solutions – ARCEJ |
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End Fed Antenna Secrets7/5/2018 |
| End Fed Antenna Secrets – PVARC 2018 | End Fed Antenna Secrets – PVARC 2018 |
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Quick and Easy RFI Solutions5/17/2018 |
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To contact Bob for a speaking engagement send an email to Sales@Palomar-Engineers.com
Prior Hamfest/Convention Pictures
Pacificon – 2019
Visalia International DX Convention
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Yuma Hamfest 2016
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Lakeside Hamfest 2015
 Scott, KG6ABF at booth |
 Scott, KG6ABF and Bob, AK6R |
Palm Springs Hamfest 2015
 Scott, KG6ABF at booth |
 Bob, AK6R at booth |
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