RG11 possibly would withstand many KW. Its loss on 40m is miniscule, around 0.4 db/100'. Even the loss of the smaller RG6 is negligible (0.7 db/100'). I use Commscope Rg6 ($80 for 1000') in my 4 sq o
Regarding the power handling of the F connector... I just unpacked 2m9x, the 9 element for 2m by M2. It has a phasing line (or balun) made of RG6 (60% coverage) and flimsy looking crimp type F connec
Must be some strange interaction, especially that SWR is high. JK Antennas recommend testing the antenna prior to installation a couple of feet off the ground, stating that resonances should be lower
If someone can afford the new RigExpert analyzer, the question will be gone. I have many analyzers: cheap nanoVNA, expensive VWNA3E, accurate FA-VA4.... But my first tool to use is RigExpert, before
On4un writes that many stations find elevated radials to be a few db below ground radials. I believe this is ground dependent. At my new QTH, initially I set up inv U about 80 ft high with 4 125 ft e
Here are the facts. N6BT made measurements on 40m. He found that radials inches of the air are much better than many more on the ground. His QTH is OR with very good soil. He also found for ground ra
W8JI writes that inv L with short radials is similar to a low bent dipole. Low dipole has a high angle of radiation. While the accuracy of modeling horizontal antennas is high, those of vertical ante
I am trying to get some gain on 160m where currently I have a shunt fed 100m tower. It works well but is not spectacular. I modeled a reflector some 100 ft away from the tower. Either as inv L with o
Steve, Excellent work and sorry for missing it. I was thinking about a quick design. Elevated radials, not 100 ground ones. T coming from top of tower on ropes. Also 30m spacing so SWR changes less c
I redid the simulations. WIth actual dimensions, the gain was 3 db lossless, 2 db with 10 Ohm of extra resistance, and 1 db with 20 Ohm extra resistance. It took 3 hrs to make the reflector.I adjuste
Very smart move with the SDR. Seems low noise and 14V are big assets. Is Samsung sensitivity to RF extending to antennas 100 ft away? New PCs including NUC support USB-C monitors where monitor chain
I have a 100 ft tower that is surrounded by 36 100 ft radials and 4 x 20 50 radials. Coax and rotor cable are buried. The area is planted with grass. I would like to add more radials but a question i
Unfortunately it is Georgia clay, sometimes mixed with sand, and a few inches of topsoil. Ignacy NO9E _______________________________________________ _______________________________________________ T
I ordered a TIC Ring. Initially it came uneven and Carl sent a replacement. This one is even but slightly oval and not exactly level. So when the ring rotates, it is very tight fit at some angles and
Keith, Please send the modifications. My tower is 45g. Ignacy NO9E _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@con
The driving gear is close to the roller but the problem is with the position gear. It is now wider than before and is positioned in the middle of the rollers. Some spring mechanism would have helped
How important is cable quality to avoid leaks? Some cables have more braiding and some less. Some have an aluminum foil and some don't. If a cable checks well for loss and impedance, is it likely to
Recently the propagation has improved and high and low beams have a similar performance whereas before there was a 2 S difference. Enjoy the sunspots. Ignacy _________________________________________
1 db and even 2 db is hard to discern. But it would clearly have an effect when quantified as success in thousands of attempted QSOs, e.g., in contesting. So we can look at the issue in statistical t
Bob, Terrible problem with the splinter. We nearly always to remember to do certain tasks with gloves, but sometimes we forget. If money is available, the dxengineering 4sq is way above that of Comte