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From: "DENNIS EASTERLING" <dennis.easterling@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
References: <BAY154-W46E722A4D4B5201E7F854DD3C30@phx.gbl>,<66E491BAB91C48AF81191F4022525A14@DennisPC> <BF4A524700075746A6467658DFC7102CB0B489A4F0@ICTS-S-EXC2-CA.luna.kuleuven.be> <6FE757960E6C447781689D4F19A315AE@DennisPC> <4EC2C6EB.2080201@iup.uni-heidelberg.de>
In-Reply-To: <4EC2C6EB.2080201@iup.uni-heidelberg.de>
Date: Wed, 16 Nov 2011 09:20:02 -0000
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Subject: LF: Re: 8970 Hz transmissions, soon again here
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Hello Stephen

Wonderful things do sometimes happen.   I will try the impossible, and =
receive your VLF transmission here in Biggleswade. - Good luck with it.

73 Dennis M0JXM
  ----- Original Message -----=20
  From: Stefan Sch=E4fer=20
  To: rsgb_lf_group@blacksheep.org=20
  Sent: Tuesday, November 15, 2011 8:09 PM
  Subject: VLF: 8970 Hz transmissions, soon again here


  VLF,

  Am 15.11.2011 17:03, schrieb DENNIS EASTERLING:=20
    [...] I also have a mini-whip, but this has been extended for
    VLF purposes. [...]

  ...which is good since soon there will be some activity again on 8970 =
Hz. If you like you can join in to the group of successful listeners on =
the 33 km band.=20

  Yesterday i carried my TX coil to the fixed antenna here. Also the PA =
and variometer part of course. I do inted to use the fixed antenna.
  I did some calculations about the radiation resistance and losses and =
power at maximum voltage (50 kV rms on the wire) and found that the ERP =
will be about 10 dB higher than expected, i.e. i could radiate something =
in the range of many 100 uW up to 1 mW or theoretically up to 2 mW. We =
will see and measure.=20

  Paul Nicholsen reported about a very senistive receiver in USA that =
allows long time integration, i.e. not producing a spectrogram but =
integrating a given TX time into a single bin, like Paul usually does.=20
  Here on the fixed antenna i could do night transmissions. 500W TX =
power key down for 24h is no problem (as long as there is no rain).

  So i am optimistic and looking forward to some new work on the =
dreamers band!=20

  Also i would be interested if there is (still) some interest in VLF in =
this group. For Paul, a endless straight "carrier" would be the optimium =
while a radio amateur may like to have some true ID and maybe a message =
to be read and displayed. What about the grabber runners and new =
prepared VLF receiving stations?

  Probably i will start next week but may do some spontaneous tests =
before...

  73, Stefan/DK7FC

  PS: I would like to see other VLF transmitting stations as well. What =
about G3XIZ, DF6NM, OE3GHB, OE5ODL, OK2BVG, DJ8WX? We all could leave =
some common traces again in the excellent dark spectrogram backgrounds!



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<HTML><HEAD>
<META content=3D"text/html; charset=3DISO-8859-1" =
http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 9.00.8112.16437"></HEAD>
<BODY bgColor=3D#ffffff text=3D#000000>
<DIV><FONT size=3D2 face=3DArial>Hello Stephen</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2 face=3DArial>Wonderful things do sometimes =
happen.&nbsp;&nbsp; I=20
will try the impossible, and receive your VLF transmission here in =
Biggleswade.=20
- Good luck with it.</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2 face=3DArial>73 Dennis M0JXM</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><B>From:</B>=20
  <A title=3DStefan.Schaefer@iup.uni-heidelberg.de=20
  href=3D"mailto:Stefan.Schaefer@iup.uni-heidelberg.de">Stefan =
Sch=E4fer</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Drsgb_lf_group@blacksheep.org=20
  =
href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org=
</A>=20
  </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, November 15, =
2011 8:09=20
  PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> VLF: 8970 Hz =
transmissions, soon=20
  again here</DIV>
  <DIV><BR></DIV>VLF,<BR><BR>Am 15.11.2011 17:03, schrieb DENNIS =
EASTERLING:=20
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    <DIV><FONT face=3DArial>[...] I also have a mini-whip, but this has =
been=20
    extended for</FONT></DIV>
    <DIV><FONT face=3DArial>VLF purposes.=20
  [...]</FONT></DIV></BLOCKQUOTE><BR>...which is good since soon there =
will be=20
  some activity again on 8970 Hz. If you like you can join in to the =
group of=20
  successful listeners on the 33 km band. <BR><BR>Yesterday i carried my =
TX coil=20
  to the fixed antenna here. Also the PA and variometer part of course. =
I do=20
  inted to use the fixed antenna.<BR>I did some calculations about the =
radiation=20
  resistance and losses and power at maximum voltage (50 kV rms on the =
wire) and=20
  found that the ERP will be about 10 dB higher than expected, i.e. i =
could=20
  radiate something in the range of many 100 uW up to 1 mW or =
theoretically up=20
  to 2 mW. We will see and measure. <BR><BR>Paul Nicholsen reported =
about a very=20
  senistive receiver in USA that allows long time integration, i.e. not=20
  producing a spectrogram but integrating a given TX time into a single =
bin,=20
  like Paul usually does. <BR>Here on the fixed antenna i could do night =

  transmissions. 500W TX power key down for 24h is no problem (as long =
as there=20
  is no rain).<BR><BR>So i am optimistic and looking forward to some new =
work on=20
  the dreamers band! <BR><BR>Also i would be interested if there is =
(still) some=20
  interest in VLF in this group. For Paul, a endless straight "carrier" =
would be=20
  the optimium while a radio amateur may like to have some true ID and =
maybe a=20
  message to be read and displayed. What about the grabber runners and =
new=20
  prepared VLF receiving stations?<BR><BR>Probably i will start next =
week but=20
  may do some spontaneous tests before...<BR><BR>73, =
Stefan/DK7FC<BR><BR>PS: I=20
  would like to see other VLF transmitting stations as well. What about =
G3XIZ,=20
  DF6NM, OE3GHB, OE5ODL, OK2BVG, DJ8WX? We all could leave some common =
traces=20
  again in the excellent dark spectrogram=20
backgrounds!<BR><BR><BR></BLOCKQUOTE></BODY></HTML>

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