Ready-to-go fully-prepared remote lectures for ham radio clubs and conventions. I can present these on very short notice, others in a few days.
Phone me any day 8AM-noon Pacific time and your club can see these presentations the same day by Zoom or later by any of the other popular remote meeting software programs: (805) 406-6176. Or send me an email: firstname.lastname@example.org with topic and suggested date(s) and time.
** NEW ** Cavities and Duplexers
Hams are very familiar iwth FM voice repeaters. There are 35,000 of them in the US. But is a main component of an FM voice repeater, the duplexer, a mystery? If yout have ever built a repeater, is the duplexer "black magic?" Do you kow how it works? Do you know the steps to modify a surplus commercial model for ham use? This presentation gives a simple in-depth over view of this little understood topic. It also shows your how to download a free.pdf book covering this material in greater detail.
** NEW ** Seeking the Optimum Magnetic Loop Antenna
Mag loops are very popular, but few are optimized for size, shape, performance, cost, building material or neighbor and HOA appeal. This presentation critically but briefly examines ALL the factors that make up an optimized mag loop, and also presents an example,a low-cost optimized PVC and foil tape loop for the largest majority of hams.
Skin Effect in Ham Radio
A not commonly understood or appreciated topic in ham radio, yet skin effect has important practical implications for our hobby. In easy non-technical terms you'll learn how skin effect takes place and why a basic grasp of it can pay big dividends in better antenna performance.
Build a 10-meter Moxon Antenna
Great project for a new ham wanting to experience the coming peak of Sunspot Cycle 23. Also, for experienced hams -- easily extended to lower HF bands. Excellent for portable and field day operation.
What is the Difference Between a Trap and a Loading Coil
Surprisingly, many hams do not know. I also recently discovered that there is a mystery in this topic -- self-resonant traps, traps without a capacitor..
Design Your Own Coax Choke (Ugly) Balun
Home brew, so called "ugly" baluns, made inexpensively from ordinary coax, are hightly effective and easy to make. Here are the easy steps to designing your own.
2m Copper Tape and PVC Pipe Helical Antenna
Amazingly simple and inexpensive 2 Meter base station antenna
Ideal new ham's first home-brew antenna
Excellent radio club DIY meeting project
Double inverted Delta No-Radial All-Band HF Vertical
A 30 ft, lower, horizontally polarized vertical with the azimuth gain
Less noticable but compaerble to to small beam on a tower but with similar electrically-steerable azimuth gain. Excellent for Field Day and portable operation
Why Should you buy a Remote Auto-Tuner?
Think that auto-tuner in your rig or that manual tuner next to it is the only tuner you'll ever need? Think again. Explore the insides of remote auto-tuners and why you may soon want to buy one.
Hide Your 2m/70cm Base-Station Antenna in a TV Satellite dish
Cut a slot antenna is the reflector of a TV satellite dish and neighbors and home owners associations won't notice it and and federal Law prevents them from telling you to take it down.
Slot Antennas for Ham Radio
Live remote presentation version of my Amazon-Kindle e-book. Includes new material. Originally presented at the ARRL Pacificon Convention, San Francisco, 2019 .
Hidden HF Attic Antenna from Inexpensive Cardboard Tube and Copper Tape
The loading coil for a concealed attic antenna need not be heavy and expensive to build. Here are two inexpensive designs. Details of an efficient 40-meter version only 25ft. long, less than 1/2 the length.