Hello Dan Please click on the link below - hopefully this is what you have. I highly suggest you find a tower professional that can help you install these guy wires. There is a huge safety risk and P
When installing the tower connection end of Phillystran guy cables, I learned that a significant problem can happen with unintended Yagi guy grip (Preform) antenna interaction. The problem is this, i
Thanks for the nudge George! Excellent idea - look for them to be in stock soon :-) 73 Tim K3LR _____ From: George Dubovsky [mailto:n4ua.va@gmail.com] Sent: Saturday, March 19, 2016 12:38 PM To: Gran
Hello Jim: As you reported - W3LPL and K3LR (and many others) are using this method with the Amphenol 83-1SP of soldering the shield on the back of the connector. It works great. http://www.k3lr.com/
Contest University Dayton (10th year) is 100 % filled this year. Those not attending CTU can watch selected sessions of CTU via LIVE Ustream thanks to Icom America. Go to the Contest University homep
The 2016 Dayton Hamvention Antenna Forum slide decks have been posted at: http://www.k3lr.com click on the Dayton Antenna Summary button. They are not all PDF - some are PowerPoint. Will try to get P
Hello Wilson: Yes, I do. Me. When I was 16 during Field Day (1976) I was removing the Field Day antenna (two element quad) at 40 feet. The temporary guy wire anchor failed and the tower fell over. I
Hello John You can get a close approximation by using this free online tool: https://www.dxengineering.com/mastloadestimator 73 Tim K3LR Hello, I've volunteered to help out a friend of mine with a ma
I have 41 years experience in stacking 2, 3 and 4 Yagi's high. After many hours behind the HFTA and NEC model engines - then putting Yagi's up in the air and using them for many years here at K3LR -
Hello Jim: Not flat here. I am on a hill - but not on top - I am down from the peak. Slopping toward Europe and Japan with a quick 200 foot drop off once you get by the north side of Interstate 80. h
Hello John, The K3LR stack has been optimized as a 3 high in phase array for best pattern control (both AZ/EL). Optimizing for best rear rejection (over 180 degrees)and eliminating high angle radiati
Hello Victor: Here are the same ones your tower had from Rohn: https://www.dxengineering.com/parts/roh-45jbk 73 Tim K3LR I have a Rohn GB45D guy bracket that is missing many bolts. The bolts that att
Hello Mike: I have been using full size Comtek four squares for 80,40,20,15 and 10 meters for over 20 years. They are very effective. The instant direction switching is great. The footprint needed fo
Hello Bill, I want to clarify some of your notes below, as many guys are reading your post and might be confused. We need to insure we get this right. T top elements (loaded) will not have a feedpoin
Hello Jeff, I like using the W0IYH style of choke in this application. It has several K ohms of CMI and goes right in series with the RG-11 line. In a 4 square the W0IYH choke must use 75 ohm coax an
Hello Tor, Although the Comtek (and others) are "50 ohm devices" - the antenna elements that connect to them are not. The Z of a mutually coupled system at the Comtek box end of the element feedlines
Hello Jim, We are talking about feedlines that are 20 feet (feedlines) above the ground. They have to be choked (both ends). The raised radial application (which is not as good as the ground mounted
_____ Hi Tim I agree 100% with your analogy. My experience with raised and with ground radial screen is one mater. But the biggest impact I had with My 4 SQ with 106 1/4 radials WAS a 43 Mix sleeve o
Hello Sam, If there is a concern about a feedline in any antenna system having common mode issues, then yes, system performance may be enhanced by installing chokes at the box as well. 73 Tim K3LR Ti
A few months ago I posted that I had cured OWA Yagi VSWR rotational issues by isolating the big grip preforms from tower legs with bent pin shackles and insulators. http://lists.contesting.com/archiv