Hi Rick As I told in the webinar it is a measured practical result, not a math calculation.. I have a DDC SRD and several receiving antennas in a very clean environment, only one TX antenna detuned,
Hi Carl Yes, the concept is assuming equal density noise spread uniform. However there air point everybody wants to hide. Vertical polarized antennas based on phasing elements does change directivity
Hi Frank I agree with you. I'm near Fort Lauderdale in a city lot, directivity from my Vertical WF did help me a lot on 160, some rare DX like 4W6 was possible only direct and using the vertical WF.
Hi Bruce, I am missing something here, can you elaborate on that statement? 73 JC N4IS _________________ Topband Reflector Archives - http://www.contesting.com/_topband
Hi Folks I have been working to improve my RX systems for several years. I ?ve got good results using good practice on grounding shielding and detuning my TX antennas. I heard this several times from
Hi Don I think my preamplifier does not agree much with that. My PC LCD monitor screen was causing several noises I could hear on 160m and actually I could see them on the SDR waterfall. When I put t
input during RX mode' ?<< There are several reasons why it is necessary to detune the TX antenna during RX, however disconnecting the center of the TX coax during RX on 160m is a MUST. If you don't
Hi Top band lovers Doug NX4D just reach a milestone on topband DX. #300 worked countries on 160m from 1/5 acre lot. Doug wants to motivate people about what is possible with dedication and good pract
My two cents Few weeks ago I requested VK0EK QSL card using Online QSL Request System (OQRS), with a modest donation. I checked LOTW and my confirmation was not there, I forgot to upload my log updat
Hi Guys The issue with noise is growing fast and the only way to improve signal to noise ratio is more directivity and when possible filter the man made noise with a horizontal loop. My last presenta
Correct link for the pdf file, It has more slides not covered during the time limited webinar http://wwrof.org/wp-content/uploads/2016/03/WWROF-WEBNAIR-RX-Antennas-for-aSmall-Lot-.pdf JC Hi Guys The
SORRY am not getting into this PR.. PIXEL loop is a low RDF and LOW performance receiving antenna, it is really snake oil. I'm out of this discussion. Regards JC In tests, the Pixel magnetic loop pro
Hi folks The Waller Flag is a high performance antenna, however the station should be well grounded. Using toroid chokes it is possible to know down common mode noise. N8PR is working hard to clean a
"I assumed that this was normal propagation for 160 but I have never observed anything consistently as good as it was in the 1980's. Anyone else found this to be true? What was different about the so
Some headphone can isolate noise very well. I like the Sennheiser HD280 , it provide 36db isolation, but the best one I have is the MC5 from Etymotic ear plug that can reach 42 db isolation. 73' JC N
My TX antenna is 60ft from my vertical WF and my horizontal WF is at the top of my TX antenna. I am using a Folded Unipole configuration, it is a skirt with 3 wires forming a cage. The skirt detune t
Your feedline is about 350 feet. That is (with RG213 -velocity 0,66-) close to 1 wavelength. With 1 wavelength feedline, the TX antenna is floating when the feedline is open in the shack. I'm sorry t
Your feedline is about 350 feet. That is (with RG213 -velocity 0,66-) close to 1 wavelength. With 1 wavelength feedline, the TX antenna is floating when the feedline is open in the shack. Just wrong
Hi Don Measuring noise figure below 1 db is a very complicated work. First you need to remove all common mode noise, your noise floor should be better than -135 dBm at least with a 40 db preamp conne
Hi topband lovers I would like to share with the group my experience living in a city lot and working on 160m. Florida Power Light used to fix power line noise in few week, but one noise just started