I got a measly 1304 miles with my 1w beacon and a North/South pointing loop
this winter. The receiving station was Southwest of me to boot. I followed
Bill's advice and it works. You have to follow his advice to the exact word
or forget it as it will work like crap. Heck Bill even made a loop that was
25 feet by 25 feet and it still made it several hundred miles on less than a
watt. Series resonate it and run the right ferrite cored transformer. No
exceptions.
Imagine if Bill was running 1000w or more, he would have one heck of a
signal. Yea high current, but he runs copper water pipe for conductors. High
current can be dealt with just like tree burning high voltages can so that
isn't an excuse for not using a loop if you live around many trees.
Mike>WE0H
http://www.we0h.us/lf
-----Original Message-----
From: [email protected]
[mailto:[email protected]]
On Behalf Of Ashlock,William
Sent: Monday, March 31, 2003 1:11 PM
To: '[email protected]'
Subject: LF: RE: GAIN
Hi Ole Buddy!
I measured the gain today between my 90 metre perimiter vertical loop
resonated on 137 khz and
my vertical system. The vertical has a 20 db gain over the loop measuring
the noise floor. Using the Decca RF pre amp with
the loop gets close to the vertical performance but with the disadvantage
of being only bi-directional. Measuring a signal
above the NF indicates the same 20 db gain by the vertical. The band is
quiet with no environmental or locally generated
noise problems.The vertical is way ahead of the loop at this QTH. The loop
is not worth considering as a TX
antenna given the above results. This recent test confirms previous
observations.
I see your still having problems with understanding how to connect up to
that loop - transformer ratios and all. Don't give up; you'll figure it out
one of these days.
Bill Ashlock
PS: I have to admit my TX loop didn't set the record distance over here this
season........... but my 1785 miles came within 35 miles of it !
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