Jim, Might it have something to do with this presentation on "Receiving Antenna Metrics" by OH6LI? http://wwrof.org/webinar-archive/receiving-antenna-metrics-with-examples/ Dan, AC6LA _______________
Interesting paper, lots of stuff to absorb. The discussion of receiver noise figure brings up a topic that has bothered me for a long time: the use of excessively high gain external antenna preamps (
On 7/7/18 12:41 PM, Richard (Rick) Karlquist wrote: Interesting paper, lots of stuff to absorb. The discussion of receiver noise figure brings up a topic that has bothered me for a long time: the use
My comments here are about the relationship between noise coming in on the antenna and circuit noise. FWIW, I know this material well, but find the way the material is presented difficult to follow.
Another question about the presentation is the validity of the noise data -- how recent is it? Hoping to answer my own question, I tried to load the referenced document. Although the reference appear
That document was superseded by: (pick your own language and encoding) https://www.itu.int/rec/R-REC-P.372-13-201609-I/en -Doug, W6DSR Hoping to answer my own question, I tried to load the referenced
Doug responded: The correct link for the English version can also be found on the "Noise Margin" tab of the Excel workbook (spreadsheet) associated with the OH6LI presentation. A slightly revised and
My comments here are about the relationship between noise coming in on the antenna and circuit noise. FWIW, I know this material well, but find the way the material is presented difficult to follow.
Another question about the presentation is the validity of the noise data -- how recent is it? Hoping to answer my own question, I tried to load the referenced document. Although the reference appear
Another question about the presentation is the validity of the noise data -- how recent is it? One issue with the strategy in the nice presentation is that they are taking the ITU noise and assuming
1) do you have a broadband(ish) preamp (perhaps with band select filters) and bring coax back to the shack where you digitize it 2) Do you put the digitizer out at the antenna, and bring the samples
1) do you have a broadband(ish) preamp (perhaps with band select filters) and bring coax back to the shack where you digitize it 2) Do you put the digitizer out at the antenna, and bring the samples
There are a number of contesters legally operating remote stations over the internet. John KK9A Just something else to worry about: Buried in the boilerplate of contest rules is something to the effe
John KK9A This is a confusing topic. Maybe I didn't make myself clear. A station with a remote receiving site, not colocated with the transmitting site, is not legal for DXCC or many/most contests. T