Hello Darrell, That echo is your "long path" signal around the globe. On 160m is not so common but on upper bands it appears daily. Weak up in the morning and listen to a local station on 10 or 14MHz
Hi Ed, I use an INV-L with 36 short suspended radials. I check the resonance and its impedance using I-V method with current transformer and an oscilloscope. For ground system I use also a 1.5m coppe
Hi Brian, I'll not pass through the theory but I can give you a good reference from Agilent: "Agilent impedance measurement handbook" http://cp.literature.agilent.com/litweb/pdf/5950-3000.pdf I use t
Hello Tod and all, As Wayne K8LEE mention, there is not enough RX antennas (also TX antennas). This is because we take into consideration only the azimuth angle but less the elevation. Ofcourse there
Hello TP, Last Saturday I worked ZL8X for over 17000km path. What amazing signal...It was the last 15min of there sun rise. Big pile-up but great signal and great operator. T/RX antenna on my side wa
Hello Mike and others, The "procedure" for tuning/optimizing vertical antennas and such (ie: INV-L) is as following: 1. Doing impedance measurement at the base of the antenna (at the feed point but,
Hello, Does anybody receive a QSL from 7O6T on 160m? If yes, please let me know what was the method. I send a QSL with an IRC inside to UA3DX as they mentioned on the WEB site, without success. Thank
Thank you for ALL who kindly answering. The conclusion is that the DXpedition organizer will start to send the QSLs (on paper) in September. So, wait for theme. 73 de YO3FFF Cristi __________________
Hello, Could someone help me with Rudy's e-mail please. Thank you. 73 de YO3FFF Cristi _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
Hello all, I like to share my experiments and hear from your similar experiments regarding ground conductivity and permittivity measurements. As we all know (should know), those two parameters ar
Hi Bob, Good point but...let see what John says on he's book. By the way, I have the 4th edition and the statement you refere to is on page 9-17 at the beginning of chapter 2.1.7.1 "Local ground ch
Hello Tom, My comments are on your message (below). I measured the impedance from 1 to 180MHz continuously with miniVNA. The presented values (27 to 5mS/m) are for 1833kHz so, are not useless. I do
Hello Richard, What I understand from your simulation (above) is that the near and far field are functions to ground conductivity. The less ground conductivity, the less electrical field will be meas
Why we are talking about A B test knowing that the ionospheric signal is fading up and down at least 10dB!? This can be verified by anybody having a stable carrier as a receiving signal and monitor
In order to estimate what is the real elevation angle (3dB or HPBW) of an antenna on far field, we should gather quantitative data. Tom, what you are after with your measurements/observation? If one
The above term comes from the measurement technique. I'll explain theme below. Qualitative measurement are when the measurement of a phenomenon or object parameter is expressed as meeting a certain
Hello Rick, I've tried also a K9AY such loop on the past SP contest and was a good improvement over my INV-L. I never heard before CE1/K7CA and south american DX stations. An A/B test were "all to no
Hello all, Did anybody receive printed QSL from 7O6T please? I've sent mine since the end of the DXpedition (half a year ago). Thank you. 73 de YO3FFF Cristi _________________ Topband Reflector
Hello, I'm interested to hear from you all, what do you use to switch RX/TX antennas on 160m band. I'm currently use an INV-L as TX(RX) antenna and a K9AY for RX. In this moment I use a high power co
Hello, Thank you to all of you who answer to my question. In conclusion, most of you receive the QSL through OQRS. I've sent mine by mail with IRC inside. The e-mail of the QSL manager is ua3dx@mail.