Message-ID: <4DD833C6.1010201@telus.net>
Date: Sat, 21 May 2011 14:51:02 -0700
From: Scott Tilley <sthed475@telus.net>
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Subject: Re: LF: Volcano eruption on my VLF-grabber
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Hi Halldor & group

Interesting!  I can see the stationary blip on the WWLLN plot over=20
Iceland, I guess that's your volcano.    I have the VLF loop aimed north=
=20
and will be leaving it that way for awhile. I can see TFK very weakly=20
all day long now...  For some reason that bearing produces the most=20
interesting natural radio phenomenon and is quieter than all the rest.

The levels on my VLF grabber have changed significantly as I changed the=
=20
opamp in the preamp from an NE5534 to at LT1028.  The LT1028 has a much=20
lower noise characteristic and seems to produce more gain in my preamp=20
design as I needed to throttle back the soundcard gain a fair amount to=20
avoid overloading it...

BTW  - for Canadian types looking for a cheap solar panel.  Canadian=20
Tire has the 1.8W battery maintainers on sale for $10.  I bought a=20
couple more as my original one works very well even on cloudy days to=20
keep the preamp battery charged (12V 2.7AH).  Even with some kind of=20
pulse circuit in it it doesn't create QRM on VLF or LF.   Strange but true=
.

73 Scott
VE7TIL



On 5/21/2011 12:54 PM, Halld=C3=B3r wrote:
> Hi all,
>
> Looks like that the new eruption in Iceland is showing up on my
> VLF-grabber.  Static activity started as soon as the eruption got
> through the ice around 19:15 and ash began to fall. Lightnings are
> always in the ash cloud. Activity is building up. More ash means more
> lightnings. It will be interesting to follow this activity next days.
>
>
> 73
> Halldor
>
>
>