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Locked New Loop Antenna
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Michael Stevenson
¿ªÔÆÌåÓýMy new magnetic loop antenna for shortwave is now
fully finished and in use. It's performance is extremely impressive and out
performs my 15 and 17 metre longwires. This is an active loop with a pre-amp and
tunes from below 2.3 MHz all the way up to 17.9 MHz, all with full remote
control.
I will be posting full details and photos to this
group in the next few days with a review of it's performance.
Best regards!
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Michael Stevenson,
Australia. |
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Michael,
Hey! It's finished! I am really looking forward to seeing the pictures. Did you use the remote volume control motor for tuning? 73, 'Bear' NH7SR --- In loopantennas@..., "Michael Stevenson" <portstevos@t...> wrote: My new magnetic loop antenna for shortwave is now fully finishedand in use. It's performance is extremely impressive and out performs my 15 and 17 metre longwires. This is an active loop with a pre-amp and tunes from below 2.3 MHz all the way up to 17.9 MHz, all with full remote control. I will be posting full details and photos to this group in the nextfew days with a review of it's performance. Best regards! |
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Michael Stevenson
¿ªÔÆÌåÓýHey Bear,
Yes sir, you bet I did and it works great, also
used the relay to switch in the second tuning gang and additional 450 pf of
fixed capacitance ( a total of 1350 pf) to tune down to below 2.3 MHz. What I
love about this loop is it's signal strength equals or slightly betters my
longwires (because I adjusted the output level control on the pre-amp to be that
way through 23 metres of RG-58CU co-ax), it's performance is just so much better
in being much less noisier including TVI and thunderstorm static crashes, it
also suffers less fading of the signals. It is very high "Q" requiring
re-peaking or tuning every 50 KHz or so which is good for the receiver (or
pre-amp) where only a narrow band of frequencies is fed to the pre-amp and
receiver. I used a 1/5 sized RG-58CU co-ax Faraday Shielded coupling loop which
seems to work extremely well. It is mounted a loop and a half diameter above the
ground. It is rather directional too requiring more rotating than I thought it
would on some signals to maximise signal strength and get the best signal to
noise ratio.
It has all come together very well and It is
performing far better than I expected which is really great, I am very happy
with it.
Will be posting details, diagrams and photos as
soon as I finish the sheets which should be in a few days.
Best regards from a happy down under
person!
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Michael Stevenson.
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