[600MRG] SID - Sudden Ionospheric Distrubances

[Bart Lee]

Hi Mike,

Welcome to the VLF Interest Group!

Go to www.californiahistoricalradio.com and join up -- $30 a year I think.
Put in your e-mail in the box at the bottom right, and you'll get weekly
reports mostly about our renovation of an old TelCo building (1901) into a
communications museum, but lots of other matters of interest. (And we did
salvage two old TelCo grounds for our system).

I'll see if I can get you John Staples articles.

Our initial focus was SAQ on 17.2 KHz; we found that "weak signal" VLF can
be a challenge. Now 2200m and 630m are calling...

I have but have not yet fired-up an Elad 2. How much internal noise do you
see?

73 de Bart, K6VK ##

-- --
Bart Lee, K6VK, CHRS, AWA, ARRL
RETIRED Attorney at Law
Bar Status Inactive

Cell Phone 415 902 7168

www.bartlee.com
{This e-mail address is:
Bart(dot)Lee(dot)K6VK(at)gmail(dot)com}
<http://www.lawforhams.com/>


On Wed, Apr 4, 2018 at 4:38 PM, MICHAEL ST ANGELO <mstangelo at comcast.net>
wrote:

> 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
>
> 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> 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>
> 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
> >
> > ---
> > This email has been checked for viruses by Avast antivirus software.
> > https://www.avast.com/antivirus
> >
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