Hi Jim, Thanks, and I have shared a lot of documents with the folks that cover the major points your section on variable speed drives covers, but found that I still had to make a recommendations list
Hi Jim, You might want to check out my website that shows my builds of the W7IUV preamp and the URL is http://sites.google.com/site/rxpreamps/. You can download my simple artwork for the circuit boar
Oops. Forgot to include the link. Here is the link. http://sites.google.com/site/lwmwbandrejectfilter/ 73, Don (wd8dsb) _________________ Topband Reflector Archives - http://www.contesting.com/_topba
Hi Rob (and gang), I would like to make one point that should be considered in this discussion. A true vertical which is what I use (not an inverted L) on 160 meters is sometimes horrible on 160 mete
Hi Tom, You said "Compared to a vertical, there could be 10-30 dB difference in favor of a low dipole (less than 150 ft high) within a few hundred miles.", and I was pretty much trying to make the sa
Hi Hank, The case I'm currently working on sounds very similar to yours but at 8 Khz separation and it's due to an AC servo drive on an injection molding machine 0.5 miles away (a visiting ham in my
Hi Jim, Check out the following review by Guy (K2AV) that was on the topband reflector back in September of 2012. http://lists.contesting.com/archives//html/Topband/2012-09/msg00177.html 73, Don (wd8
Tim, $3.18 a piece at McMaster-Carr (18-8 stainless), part number 91862A318 <http://www.mcmaster.com/#91862A318>. Don (wd8dsb) _________________ Topband Reflector Archives - http://www.contesting.com
Hi Mark, I modeled your antenna last night, and have some comments. There is almost as much reactance as resistance at the feedpoint of your EWE based on your dimensions and termination resistor, but
Especially on 160 meters I don't think the S in RST has a lot of scientific value since there is no real numerical standard as it relates to true signal strength. In my own mind I have come up with a
Hi Kris, If you belong to the shared apex loop Yahoo Groups click on the file tab and then look for my call sign. You will see plots that I generated looking at the front to back ratio versus elevati
I was holding back on posting a comment on this topic of continuous calling (I actually typed out a response but deleted it twice yesterday) but thought I would finally hit the send key in an attempt
Larry said "propagation was interesting" and Tree said "W4ZV reported on the topband chat page that the signal seemed to be coming in from the North!" in regards to VP8STI last night. At times I coul
Hi Lou and gang, Lou thanks for the link to your K5P recording, and below is a link to a youtube video I made on Jan 16 while copying K5P on 160 meters that also includes comparison of my approximate
K5P was very strong on 160 meters this morning around 0830 UTC and QRN was very low (no static crashes due to the lack of thunder storms in the US), and I finally got into their log running my 100 wa
Hi Gary, I previously was amazed at some loud stations (like 20 or 30 dB over S9) that could not hear my 100 watt station, and I thought it was due to the fact that they were using directional RX ant
Hi Gary, As far as I can tell, it's all lightning related (regardless time of year). I suggest you look at one of the world wide real time lightning maps on the Internet (if you don't already) and th
Hi Carl, Does not appear anyone has answered you, so let me give it a quick shot while between flights in Japan. I'm somewhat confused with your final L network configuration because you mentioned on
Hi Rick, I would also think that peak radiation angle of the RX antenna versus the arrival angle of the desired signal is also a big variable that would not allow the relationship you heard on the we