Wonder why the TOGA map shows all that below the equator activity and 2 that show the equator of the others do not. Seems strange to me. Lee K7TJR _________________ Topband Reflector Archives - http:
Hello JC and others, I must take a little issue on being able to measure the vertical arrays. While it may be true that it is hard to measure, you can indeed see the pattern quite well by looking at
Greeting top-banders and Ed, You could simply disconnect the elements from your Hi-Z amps at each element. This will tell you if the noise is being generated in the system or coming in the air. My gu
These two sites are also gone now. Hauled away for scrap. Acres of stainless mesh wire ground plane as well. http://www.k7tjr.com/fps118_oth_radar.htm Lee K7TJR _________________ Topband Reflector Ar
Ken, did you remember the 180 degree phase inversion needed on the Waller flag. It will act like a very large signal level single loop if not. Lee K7TJR _________________ Topband Reflector Archives -
Hello Gary and all, The answer to your question depends on how quiet your location is. If you have an extremely quiet location I would go with another section of tubing for 23 feet overall with the H
John, do your NEC4 numbers take in to account the signal that actually arrives at the element insulators and the amplifiers with their inherent input capacitances as a load on the element source capa
Thanks John, I have been faced with this capacitive loss thing for a long time. It became quite necessary to reduce it to make my all active HI-Z 8A array work well. Especially with the early Hi-Z am
Hello Gary, Spray painting the elements is no problem. As far as mounting the amps to the elements I would not recommend that. It likely could compromise performance. It would be much better if you c
Yes Ed, You have the right numbers. It won't matter which windings are first or last. You can even wind 4 then wind 1 more and use it as an autotransformer where the 1 turn is added to the 4 for 5. A
Actually there is a reason or two to match the feedline impedances when using these active antennas. There are amplifiers in most of these systems that rely on their matched impedances to produce the
Paul, I suggest you talk to Gary KD9SV as he built a Hi-Z around his TX antenna. Incidentally the ground radials under the Hi-Z is not a good idea. I suspect you would have to use NEC4 to see the rea
Gary and others, As I said losing 6 dB + on the 4-8 Pro by going to the smaller diameter array down to 84.84 feet in diameter will be no problem whatsoever. There are still many users using the array
Greetings Top-Banders, I have been away for a couple days, sorry for the late comments. The fact is, for me there is no definitive answer to the effect of trees on the Hi-Z arrays. I have made tests
Hello Herb and fellow Top Banders, When I had Beverage antennas here I was never able to read the ground resistance here as well. The reason it did not work here is there was actually a small DC volt
Hello Gary and Top-Banders, Gary, I would be more inclined to think in your case you would be better off with some radials laid out on each vertical the same way. Short verticals no longer than the e
Did anyone else work the station IDing as 4MJK? The ARRL robot will not accept that call sign. I was pretty sure I had it right. Lee K7TJR OR _________________ Topband Reflector Archives - http://www
Bingo you guys are great. One little Dah. TNX Lee Did anyone else work the station IDing as 4MJK? The ARRL robot will not accept that call sign. I was pretty sure I had it right. Lee K7TJR OR _______
My apologies to all the EU stations that tried to call me in the ARRL 160 contest. I have received several e-mails and comments on the KST chat about that. (No Ears). I have a new wood products plant
Just a note that I have unclaimed the 4M1K QSO from my official log in the contest. My question on the reflector appeared as assistance to some in the contest. And rightly so. The ARRL submission AP