Message-ID: <002e01c85f17$613a33f0$3d7136d2@SN2941077064>
From: "gboorerzl3pn" <gboorerzl3pn@xtra.co.nz>
To: <rsgb_lf_group@blacksheep.org>
Date: Fri, 25 Jan 2008 18:58:58 +1300
MIME-Version: 1.0
Subject: LF: phasing lf antennaes
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Here in new-zealand a number of lf hams used or have used  a phased wire or=20=
rod to alter the reception patterns to reduce man made and natural atmospher=
e noise ..on lf...they could north only sensitivity or throw a switch and li=
sten south only..not used of course on transmitting..havnt used that system=20=
my self as i am in a quiet country style setting on southern edge of timaru.=
....but in early days 14years ago i was blocked by  s9plus 40 powerline carr=
iers on lf band..they were generated on north side of timaru city...i built=20=
a 16ft square loop tuned to lf..the sharp null of the loop was aimed at the=20=
direction of the ham signal i wanted.  the big vertical was used as main gen=
eral recieve antennae..the noise picked up by the loop was fed out of phase=20=
with the vetical in a mixing amp..because the loop had its null on the ham s=
ignal it couldnt be phased out...was published in our breakin mag..i got so=20=
good the s9+ power carriers were just a faint dribble . after  a while they=20=
shut the power line system down..i believe they now use OLD DOCTOR FINDLAYS=20=
modern methods   hihi george  that all do now  ..a bed time story for lfers=20=
  bye for now

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<DIV><FONT face=3DArial size=3D2>Here in new-zealand a number of lf hams use=
d or=20
have used&nbsp; a phased wire or rod to alter the reception patterns to redu=
ce=20
man made and natural atmosphere noise ..on lf...they could north only=20
sensitivity or throw a switch and listen south only..not used of course on=20
transmitting..havnt used that system my self as i am in a quiet country styl=
e=20
setting on southern edge of timaru.....but in early days 14years ago i was=20
blocked by&nbsp; s9plus 40 powerline carriers on lf band..they were generate=
d on=20
north side of timaru city...i built a 16ft square loop tuned to lf..the shar=
p=20
null of the loop was aimed at the direction of the ham signal i wanted.&nbsp=
;=20
the big vertical was used as main general recieve antennae..the noise picked=
 up=20
by the loop was fed out of phase with the vetical in a mixing amp..because t=
he=20
loop had its null on the ham signal it couldnt be phased out...was published=
 in=20
our breakin mag..i got so good the s9+ power carriers were just a faint=20
dribble&nbsp;. after&nbsp; a while they shut the power line system down..i=20
believe they now use OLD DOCTOR FINDLAYS modern methods&nbsp;&nbsp; hihi=20
george&nbsp; that all do now&nbsp; ..a bed time story for lfers&nbsp;&nbsp;=20=
bye=20
for now</FONT></DIV></BODY></HTML>

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