Welcome to K9LA’s Amateur Radio Propagation Web Site
Carl Luetzelschwab K9LA
I retired in early October 2013 after 41 years of RF Design with Motorola and Raytheon (formerly Magnavox).
If you’d like for me to give a presentation on solar topics and/or propagation to your local club via Skype, just let me know (email@example.com).
NEW on 12 September 2014 in the Webinars link - My presentation from my WWROF webinar on September 11, 2014 titled “A Long Overdue Review of Gray Line Propagation on the Low Bands”.
NEW on 23 July 2014 in the DXU link - My presentation from DXU at the ARRL Centennial.
NEW on 23 July 2014 in the 160m link - My 160m presentation at the ARRL Centennial.
NEW on 23 July 2014 in the Basic Concepts link - My propagation prediction presentation (peek behind the curtain) at the ARRL Centennial.
NEW on 23 July 2014 in the 160m link - “Full Moon and Low Band DXing”
NEW on 23 July 2014 in the HF link - “Skewed Paths to FT5ZM on 10-Meters”
NEW on 23 July 2014 in the HF link - “Santa Claus Polar Path”
Reminder: The W6ELProp executable file is in the Tutorials link.
Reminder: NM7M’s book titled “The Big Gun’s Guide to Low-Band Propagation” is in the 160m link.
Reminder: NM7M’s book titled “The Little Pistol’s Guide to HF Propagation” is in the General link.
I have been licensed since October 1961 (my Novice call was WN9AVT). My interest in propagation goes back to my college days at Purdue University (BSEE 1969, MSEE 1972).
This web site contains selected articles about propagation from my monthly Propagation column in WorldRadio (now Practical Propagation in CQ Plus) and from my contributions to other Amateur Radio publications. These propagation articles are grouped into Timely Topics, Basic Concepts, Tutorials, General, 160m, HF, VHF, Contesting, and Webinars. Just click on the link on the left to navigate to these areas.
You may also read about my early Novice days at the WN9AVT link, my aviation days at the Aviation link and some RF power amplifier topics in the RF Power Amps link.
You can contact me at firstname.lastname@example.org.