Please elaborate! The LF stations you are likely to receive would all be from Europe or Mediteranean countries in N. Africa. From your location, I wonder how you would get enough directivity to separ
Much much closer to home for us Pacific NW'ers: https://maps.google.com/maps?q=40+43+24+n,+141+19+44+e&hl=en&ll=40.72308,141.328892&spn=0.003313,0.006968&sll=40.723876,141.329155&sspn=0.026507,0.0557
Neither do I. It's quite common practice for distributors to have their own part numbers. Witness DigiKey - here is their ferrite page : http://www.digikey.com/product-search/en/inductors-coils-choke
There is some published research in this area, mostly from the BBC using MW stations as the signal source. I'd start with BBC report 1968-45, now available online. Chuck _________________ Topband Ref
Jim: Digital sidebands for AM stations only extend +/- 15 kHz from the carrier. If noise is being heard 317 kHz above the carrier, it's not due to IBOC usage. Chuck _________________ Topband Reflect
Their description (to me at least) indicates an elliptic filter with a stopband peak of -40 dB at 1 MHZ and ranging to infinity (in theory) elsewhere in the stopband. In other words, 40 dB is the max
To focus any discussion, could you be specific? It's rather hard to react to such a broad statement. Chuck _________________ Topband Reflector Archives - http://www.contesting.com/_topband
Jim - Sorry, there was no link included in your response. I bet you mean your RFI tutorial. If so, please be specific about what part of the document is relevant. Giving a link to a large document to
You might want to take a look at some technical reports from the BBC Engineering Department. Two in particular: RA-25 titled "Influence of Ground and Sea on MF Propagation" and 1975-32 titled "LF and
W3RE : Apparently you missed the references I cited for BBC Engineering reports.Apparently everyone else did also, as they've not been mentioned since. And as for only hams being aware of seaside gai
Guy: This I do not understand. As a Beverage is a travelling wave antenna, it has no resonance. Chuck <CLIP> _________________ Topband Reflector Archives - http://www.contesting.com/_topband
Frank: I believe there is a large influence of height above ground on VF. This was experimentally verified in the Litva and Rook report from the CRC (Canada), and compared with theoretical results. T
I think this is a wording issue. We all understand the difference between VF in the transmission line and VF in free space. What caused difficulty was the term "arriving at". I took this to mean "at
And for those that like to be closer to a lot of power while producing arcs: https://www.youtube.com/watch?v=bNawh4faZM8 Chuck ________________________________________ From: Topband <topband-bounces@
Bruce: The solar storm was fairly minor. Both the SF and DC outages were confirmed as caused by a equipment failure and sunsequent fire in a substation. Chuck ________________________________ From: T
Can you be more specific about "deterioration"? - front to back? - front to side? -gain? It's my feeling that lengthening a BOG past .5 wavelength or so may bring a bearing into a null and move other
The commercially available Beverage transformers I have seen are like the W8JI model: 2 primary turns on a BN73-202 core. My calculations say 4 turns are needed at 630 m. Does anyone know of commerci
Tim: Thanks for digging that out. It makes me worry much less about using BN73-303's with 2 or 3 turns in the primary at 630m. My only problem is that I don't understand why the low end is so good fo
Yes, I think we all agree on the meaning of the 4X rule and the other basics. The mystery to me remains that a 1 turn transformer was good to 270 kHz in the Clifton data. I calculate at 500 kHz: 1 tu