Herb A good way to test a TX antenna is to listen to one of the many SDR receivers available on line << We can use the reverse beacon network. RBN, select DX spot HF > 160m http://www.reversebeacon.n
On 10/25/2012 11:51 AM, Tom W8JI wrote: Qualitative or Quantitative...Let me get this straight. If I call CQ and the band is open to Europe on 160 and nobody replies after a couple of hours with my T
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
nowadays, I don't raise a skimmer in EU for several weeks, JA, ZL or VK since August. Keep in mind that both of the Skimmers in ZL have very poor reception on 160. ZL2RV is using a short active ante
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?>>> Only
The experience here during the stations contest days of the 90's was with a high inverted V at 160-180' (added 20' to the tower after a lightning hit) along with a pair of 1/4 wave verticals with 32
I stand by my remarks. This still does not substitute for the lack of confirming data at farther distances. If there is data contradicting NEC4 out at distances like 50 km, bring it on. We would all
I'm intrigued by the number of comments on this thread. I'll offer my two cents as if there are a few who might concur. Size matters only in the length and density of the ground plane elements. Elect
Presumably the above text was meant to read "So far NEC4 has _NOT_ predicted any real measurements, regardless of operator skill." Some may not recall the comparison of groundwave fields calculated b
In my first post of this date I wrote, "Another important observation to be made from that NEC data is that space-wave radiation from elevation angles below ~2 degrees equals the radiation in the gro