Frank, Rhombics don't have to be terminated. If the far leg is open, it becomes bi-directional. If you terminate them try 600 to 800 ohms resistive. I had pretty good luck with mine on both 80 and 40
Jurgen, Try this URL http://www.eng.mu.edu/~usi/hamstick.html for a 3.7M boom mini-beam and 40Mtr vertical made using hamsticks that you can pack in a travelling tube. I plan on doing one for my trip
Our Club used this tower for FD and according to Universal use stainless steel, good grade hardware and nylon locking nuts. No washers needed. Jon Hamlet, W4ZW Casey Key Island, Florida "A little bit
Bill, Remember that the two most common "verticals", the R-7 by Cushcraft and the DX-77 by Hy-gain are not 1/4 wave verticals. The R-7 is a halfwave vertical and the DX-77 is a hybrid windom fed 1/2
Took down my beams today in anticipation of Hurricane Georges. Yesterday, I dropped the 402CD down the mast until it rested on the A4S in preparation for taking them all down today. Just out of curio
Thanks Joe, Nothing like hearing the facts from the source. Whether it's 3/8 wl or 1/2 wl I still stand by my premise that it's a pretty good antenna for it's size and ease of erecting/tuning. Automa
I've had tribanders on my roofs for many years, as well as tribanders and monobanders on towers both here and in Europe. Over the last few years, I've used KLM KT-34A, TH-6, A3S, A4S, TH-7, and TH-11
Rod, Here's my reply to Dave FWIW. a metal building.. Does anyone have a idea >as to how to make/install the radials?? The antenna will be >mounted on a tri-pod, the roof is about 15' high, from grou
We (Tamiami Amateur Radio Club) used a bob-tail this year in our QRP effort and it worked really well. Of course being in SW Florida, the only direction we need is North. We used it here on Casey Key
Ted, Most common problem I've had with the R-7 which gave me inexplicable SWR changes after working perfectly is when the R-7 slips down onto the supporting mast. Depending on the size of mast it is
This is a multi-part message in MIME format. --=_NextPart_000_0001_01BDB0A1.FA18E280 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit I have decided to install a more pe
Thank you Mark for an erudite and eloquent essay on a complicated subject. Where you chances of being struck by lightning are greater than winning the Florida lottery. Jon Hamlet, W4ZW Casey Key Isla
Brian, snip > The Antenna Compendium describes some experiments with the "Half-Loop" antenna which is a half of a full loop This configuration is often referred to as a "travelling wave" antenna and
It seems to me that we often fail to walk a bit in the other fellows' shoes. First, I've had towers and antennas all over the world (Russian bureaucracy was the most difficult and most corrupt) and I
Wow Mark! What a blow by blow "how to". That's pretty much how I do it except I use an open faced fishing reel with only the handle section. I had used this method for years even with the 75' lodgepo
Tom, I've also used aluminum arrows, and switched to the wrist rocket after losing too many, which are still visible today embedded in the tops of my trees. I'm not that good an archer. Jon Hamlet, W
Second that! Do most of my shopping via the Net now and sales tax free. Jon, W4ZW P.S. Charlie, we could play some childhood games, you with your 30-30 carbine and I with my bow and arrows. -- FAQ on
Stu, Must be something wrong with your R-7! I've used them since they came out. I've used them over the world and I've had fantastic results! Used one for five years in Russia along with an A4S and v
This configuration is often referred to as a "travelling wave" antenna and the results can be quite good. I used this type with a matching unit at the ground feedpoint which also included several gro
Roger, I hate to tell you but this experiment was done a long time ago and written up in an April issue of QST. The only variation was that the experimenters used a vertical antenna which would certa