I am curious about the use and design of an unusual high power, low band antenna which I saw recently while cycling in France. I wonder if anyone knows anything about it. The site is close to N89, ab
Photos of the mystery antenna were graciously posted by Kirk here: http://www.k4ro.net/k3na/ Thanks, Kirk! Maybe this will help the curious figure out what this system is all about. 73, -- Eric K3NA,
The DXZone quotation of the International Radio Regulations cited in WA4FKI's message is obsolete. The summary of regional allocations is also over-simplified. The current version of the applicable p
A number of factors are at work, and each person's abilities/sensitivity vary. Depending on the situation, a lower or higher pitch will be more appropriate for a particular operator. 1. Pitch Discrim
Personally I would really like to get the Stew Perry contest out of the end-of-year holiday period. It is almost impossible for me to manage end-of-year workload and family obligations such that I ca
Hello everyone -- My 160m experiences at 3B7C were fun but also often frustrating. Highlights were the long/skew path QSOs with stations in zone 3 around 1400z. I was the operator every afternoon (ou
The Contesting Compendium wiki now contains the 160m frequency allocation table developed by K0CKD and K8ND. The table contains two parts: -- A listing by frequency, so that you can see which countri
I'll be glad to answer question, Luis. In general the design goal for the matching network was to achieve an extremely low SWR (for 75 ohm cable). An excellent match means the feedline can be used as
Hi Luis -- I tried to answer your questions inter-linea. -- Eric on 2010 Jun 20 16:04 Luis Mansutti IV3PRK said the following: I dug back into my lab notebooks for 2007 Jun 26. For 160m I built and m
I thought about lumped components for the delays. I did not have time to evaluate a lumped-component system for maintaining the desired phasing over the entire band. Did you look into this aspect, Ri
on 2010 Jun 21 10:38 Richard (Rick) Karlquist said the following: In the mathematical model of the matching network R1 was needed. In the as-build prototype, it was not. I suspect the core loss in th
Grant KM5KG (SK) had a Windows program for impedance matching network design that provided current and voltage levels for each component in the system, based on the power passing through the network
Hi Frank, everyone One does not need another person to be harmed by the intermod on 1940 kHz AM broadcast regulations include a very strict bandwidth mask for any form of radiated spurious signal mor
To Georges point: This site is definitely in the complex category. Both stations change patterns between day and night, meaning they have a lot of (expensive) phasor hardware and high-current switche
I found the 4-station site: Tri-County in Sauk Rapids MN: 7 towers, 4 stations, all with different day/night patterns. A report is here <http://www.mwpersons.com/articles/2013/four-am-stations/four-s
Let me know if this 1940 spur still exists. If yes, Ill make some inquiries by other routes Eric _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
Being so close to the transmitter site. it's quite possible that you are experiencing receiver front end overload, and your receiver is generating some of these signals. You might wish to try the AM
The PDF that Ken provided is the more comprehensive version of the NCJ article. The attached also discusses some of the design considerations at VP6DX (2008). 73, Eric K3NA _________________ Searchab