[600MRG] SID - Sudden Ionospheric Distrubances

[MICHAEL ST ANGELO]

Bart,


I'm interested in the CHRS VLF Interest Group. How can one join?


Mike N2MS

 

> On April 4, 2018 at 2:25 PM Bart Lee <bart.lee.k6vk at gmail.com> wrote:
> 
>     Roger Graves is exactly right: "What you see will depend on how good the attached antenna is how low [the SDR's] noise is."
> 
>     I have been using a WinRadio G33 SDR since 2012. It is a wonderful machine (fancy-named the "Excalibur Pro"). So far, lots of 630m signals and at least one 2200m signal.
> 
>     Vertical antennas work best for me on VLF, because they escape the 60 cycle harmonics the loops pick up from nearby power-lines, although the big loop, many square meters capture area, is more sensitive.
> 
>     The internal noise on the frequency of interest is an issue with the G33 for SAQ on 17.2 KHz.  WinRadio says its new G65 solves the problem.
> 
>     John Staples, W6BM has had great success with tuned loops (and a Collins 389). Their directionality helps.  We (the CHRS VLF Interest Group) are hoping that what we've learned will translate to 2200m.
> 
>     We have written several related articles for the California Historical Radio Society Journal. I'll send PDFs to anyone in the 600m Group who wants one. Several of us, including John Stuart, KM6QX have logged all three Russian Alpha stations from 11.904 KHz to 14.881 KHz, and lots of other VLF stations including experimental licensees.
> 
>     73 de Bart, K6VK ##
> 
>     -- -- 
>     Bart Lee, K6VK, CHRS, AWA, ARRL
>     RETIRED Attorney at Law 
>     Bar Status Inactive
> 
>     Cell Phone 415 902 7168 
> 
>     http://www.bartlee.com/
>      
>     {This e-mail address is:
>     Bart(dot)Lee(dot)K6VK(at)gmail(dot)com}
>      
> 
> 
>     On Wed, Apr 4, 2018 at 10:46 AM, Roger Graves <ve7vv at shaw.ca mailto:ve7vv at shaw.ca > wrote:
> 
> 
>         > > The Kiwi SDR’s go to 10 kHz. What you see will depend on how good the attached antenna is how low their noise is. The one at VE7AB is quite good on VLF.
> > 
> > 
> >         > On Apr 4, 2018, at 10:18 AM, Kenneth G. Gordon <kgordon2006 at frontier.com mailto:kgordon2006 at frontier.com > wrote:
> >         >
> >         > On 4 Apr 2018 at 17:16, Mel Farrer wrote:
> >         >
> >         >> Just a thought, any SDRs site go that low?
> >         >>
> >         >> Mel, K6KBE
> >         >
> >         > Hmmm....good question. I have no idea.
> >         >
> >         > Others may.
> >         >
> >         > Ken W7EKB
> >         >
> >         > ---
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