As a feedline, as in any "twisted pair" like old phone line was called, CAT-5 has been successfully used as a feed line for RF. There is no reason it should not perform any worse than 200-300 ohm rib
Having read often that common mode rejection and isolation are so very important in getting the most out of Beverages I share my experiences: I have found here that the performance of a reversible Be
Mark, It is easy to build a switch with a 12vdc relay in a metal box using BNC connectors (saves drilling large hoes for PL-259's) and since in my case with the icom 746PRO there is not 12vdc availab
Mike my QTH is very close and my Beverages (some of them) terminate within 500 feet of a large salt pond. The field they are across has ground water down about 20 feet and it is brackish but all my B
One thing you can do is remove the Beverage wire from you feed transformer and measure the return loop resistance with a VOM. If the value you read is 100 ohms higher or more than your termination yo
Long before we were using RF to communicate very far Tesla had it all right there...... http://www.magnetricity.com/NeoG/Bifilar.php Nikola Tesla explains that a standard coil of 1000 turns with a po
In Tesla's own words on the coil patent application Jan 9, 1894: *"I have found that in every coil there exists a certain relationship between its self inductance and capacity that permits a current
Andy Ikun, G8LUG wrote in part........ If there is any advantage for a 1.8 Mhz resonance with enhanced capture area while retaining the special loop nulling characteristics, would it not make sense t
I don't know if this solar wind indicator is of any value but I found it on a site where I get an update on local and regional weather conditions. I have see solar conditions on many amateur radio we
Mike, You might want to look at the "Super Loop" at larc.hamgate.net/SuperLoop.htm and double the dimensions for 160 meters. Remember the ladder line stub at the center is 1/4 wave shorted and allows
On my Cushcraft MA160V, the resonant SWR point has lowered from almost 5:1 to 1:1 without the Amidon unUn in line. All 26 of the buried radials are attached. The main difference is that the normally
Paul, I was trying to suggest that with a good radial ground the impedance variation should be less variable due to moisture. On your question, it all depends on the soil. Fresh water is an insulator
Hello there, this is Andrew OZ5E, Our 4-directional Beverage (ladder line) works fine but sometimes we would like to be able to operate on 80 and 160 at the same time from 2 different stations on the
Chicken wire or rabbit wire make an inexpensive alternative to an expanded copper mesh ground screen. Just roll it out in multiple directions from the tower base and tack it to the ground on top of t
My question is whether a perimeter wire attached at the corners will be helpful, or should I use individual perimeter wires each connected to the distant end of each short radial to create four 53' b
Nandu, Since you already have a full size 80 meter dipole and since your height above ground is good I would suggest you insert a pair of Unadilla KW-80 traps in that dipole. You will need to lengthe
Some newer rigs like the Icom !C-7410 do not have a separate RX antenna input. One reason was probably that the close proximity of a TX antenna would often take out front ends. I currently use the DX
George, Are you familiar with the Franklyn antenna design? Some broadcasters swear by them and claim a 3 db increase over a 1/4 vertical radiator. Herb, KV4FZ ________________________________________