Dick, I ran some simulations. There is very heavy coupling to the tower. That's not such a bad thing. The tower current is 180 out-of-phase with the inverted-L current. The GND return current is the
Eric, here is a link to a review of a device made for this. They say it will shot a tennis ball 300 feet. It's $119. http://www.eham.net/reviews/detail/5199 There is also a slingshot/fishing reel dev
Ed, here are some dimensions derived using EZNEC: Height 90', 4" diameter four #14 top hat wires 20' Base coil 5 uH (make coil 10 uH and tap it) Radiation resistance 22 ohms This article by K3LC will
Ed, Let's compare the 90' top loaded vertical against a 90 foot vertical without top loading wires. Mechanically it might be nice to not have the top loading wires. In that case the radiation resista
Picture 5 shows the generator connected to the coax inner conductors It should be connected to the coax shields. Dave WX7G _______________________________________________ ____________________________
The HEBA appears to be the same animal as the CFA (Crossed Field Antenna) patented by Dr. Kabbary and M.C. Hately in the late 1980s. As the HEBA Model 103 Performance Analysis says, *" WWAS accomplis