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From: "Dave G3WCB" <ganymede444@btopenworld.com>
To: <rsgb_lf_group@blacksheep.org>
Date: Sat, 2 Jun 2007 22:16:05 +0100
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Subject: LF: [500] 500 Khz Portable Results
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Hi Colin, Geoff and LF.

You put an enormous signal into this location today...599+. I measured -59
to -57 dBm. Jim M0BMU was also very strong....-56 dBm. I had a QSO with
Brian G3UNT but you had gone QRT by then...so...better luck next time!

Got a couple of big-ish *.WAV files if you are interested.

73, Dave G3WCB IO91RM Iver nr Windsor
  -----Original Message-----
  From: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of G3vtt@aol.com
  Sent: 02 June 2007 16:59
  To: rsgb_lf_group@blacksheep.org
  Subject: LF: 500 Khz Portable Results


  Good afternoon,

  A collective reply to all of your e-mail's.

  Firstly sincere thanks to all of the stations who came on, particularly
those who called but we could not hear.

  Reports were G3UNT 599plus, G3XAQ 599, MoBMU 579, G3KEV 579. Nothing heard
from Adrian G4GDR or Dave G3YMC as we had a 10 Kw broadcast station at Hoo
breaking through into our DC receiver. The receiver was an NE602 mixer
oscillator feeding an LM386 and the transmitter was a two transistor,
BC108/BFY51 driving an IRF510 with 10w output. This was link coupled, 16
turns, into a series atu using 300 turns of wire on a 1.5 inch plastic pipe
and 1000pf series tuning. Two delta kites were used to lift the wire at 45
degrees and the counterpoise was 200 feet of wire laying on the beach and
going into the Thames.

  The battery supply was an alarm system gel battery and the whole lot was
forced marched from my house down the hill and across the marsh to Egypt Bay
which is almost opposite Canvey Island in the mouth of the Thames. It is
around an hour in both directions in the blazing sun.

  Putting the wire into the river (salt water) caused the aerial current to
fall. Using the wire as a true counterpoise laying on the beach gave a
significant increase in current. We are convinced we would copy all stations
with a better receiver. Geoff G3YVF has returned to base to modify the rig.

  Thanks again, we will repeat the exercise as soon as we can.

  We saw no sign of any Ofcom inspectors despite informing the local Field
Office........

  73 all Colin G3VTT & Geoff G3YVF

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3DUS-ASCII">
<META content=3D"MSHTML 6.00.2800.1458" name=3DGENERATOR></HEAD>
<BODY id=3Drole_body style=3D"FONT-SIZE: 10pt; COLOR: #000000; =
FONT-FAMILY: Arial"=20
bottomMargin=3D7 leftMargin=3D7 topMargin=3D7 rightMargin=3D7>
<DIV><SPAN class=3D384163620-02062007>Hi Colin, Geoff and =
LF.</SPAN></DIV>
<DIV><SPAN class=3D384163620-02062007></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D384163620-02062007>You put an enormous signal into =
this=20
location today...599+. I measured -59 to -57 dBm. Jim M0BMU was also =
very=20
strong....-56 dBm. I had a QSO with Brian G3UNT but you had gone QRT by=20
then...so...better luck next time!</SPAN></DIV>
<DIV><SPAN class=3D384163620-02062007></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D384163620-02062007>Got a couple of big-ish *.WAV =
files if you=20
are interested.</SPAN></DIV>
<DIV><SPAN class=3D384163620-02062007></SPAN>&nbsp;</DIV>
<DIV><SPAN class=3D384163620-02062007>73, Dave G3WCB IO91RM Iver nr=20
Windsor</SPAN></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
  <DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT=20
  face=3DTahoma>-----Original Message-----<BR><B>From:</B>=20
  owner-rsgb_lf_group@blacksheep.org=20
  [mailto:owner-rsgb_lf_group@blacksheep.org]<B>On Behalf Of=20
  </B>G3vtt@aol.com<BR><B>Sent:</B> 02 June 2007 16:59<BR><B>To:</B>=20
  rsgb_lf_group@blacksheep.org<BR><B>Subject:</B> LF: 500 Khz Portable=20
  Results<BR><BR></FONT></DIV><FONT id=3Drole_document =
face=3DArial><FONT=20
  id=3Drole_document face=3DArial>
  <DIV>Good afternoon,</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>A collective reply to all of your e-mail's.</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>Firstly sincere thanks to all of the stations who came on, =
particularly=20
  those who called but we could not hear.</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>Reports were G3UNT 599plus, G3XAQ 599, MoBMU 579, G3KEV 579. =
Nothing=20
  heard from Adrian G4GDR or Dave G3YMC as we had a 10 Kw broadcast =
station at=20
  Hoo breaking through into our DC receiver. The receiver was an NE602 =
mixer=20
  oscillator feeding an LM386 and the transmitter was a two transistor,=20
  BC108/BFY51 driving an IRF510 with 10w output. This was link coupled, =
16=20
  turns, into a series atu using 300 turns of wire on a 1.5 inch plastic =
pipe=20
  and 1000pf series tuning. Two delta kites were used to lift the wire =
at 45=20
  degrees and the counterpoise was 200 feet of wire laying on the beach =
and=20
  going into the Thames.</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>The battery supply was an alarm system gel battery and the whole =
lot was=20
  forced marched from my house down the hill and across the marsh to =
Egypt Bay=20
  which is almost opposite Canvey Island in the mouth of the Thames. It =
is=20
  around an hour in both directions in the blazing sun.</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>Putting the wire into the river (salt water) caused the aerial =
current to=20
  fall. Using the wire as a true counterpoise laying on the beach gave a =

  significant increase in current. We are convinced we would copy all =
stations=20
  with a better receiver. Geoff G3YVF has returned to base to modify the =

  rig.</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>Thanks again, we will repeat the exercise as soon as we =
can.</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>We saw no sign of any Ofcom inspectors despite informing the =
local Field=20
  Office........</DIV>
  <DIV>&nbsp;</DIV>
  <DIV>73 all Colin G3VTT &amp; Geoff=20
G3YVF</DIV></BLOCKQUOTE></FONT></FONT></BODY></HTML>

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