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LF: phasing lf antennaes

To: <[email protected]>
Subject: LF: phasing lf antennaes
From: "gboorerzl3pn" <[email protected]>
Date: Fri, 25 Jan 2008 18:58:58 +1300
Reply-to: [email protected]
Sender: [email protected]
Here in new-zealand a number of lf hams used or have used  a phased wire or rod to alter the reception patterns to reduce man made and natural atmosphere noise ..on lf...they could north only sensitivity or throw a switch and listen south only..not used of course on transmitting..havnt used that system 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 carriers on lf band..they were generated on north side of timaru city...i built a 16ft square loop tuned to lf..the sharp null of the loop was aimed at the direction of the ham signal i wanted.  the big vertical was used as main general recieve antennae..the noise picked up by the loop was fed out of phase with the vetical in a mixing amp..because the loop had its null on the ham signal it couldnt be phased out...was published in our breakin mag..i got so good the s9+ power carriers were just a faint dribble . after  a while they shut the power line system down..i believe they now use OLD DOCTOR FINDLAYS modern methods   hihi george  that all do now  ..a bed time story for lfers   bye for now
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