{OT} Alexloop Walkham Antenna

[RICHH]

Hi Stan
    I own an AlexLoop  and a few of us hams went into a park and did some
 signal comparisons on  20 meters.   We compared an
Alexloop,  a full size vertical with four radials, and a 1/2 wave  end fed
for 20 meters.
I used an a/b switch on receive and transmit.
The vertical beat out the other antennas by less than an  an s unit.   The
Alexloop was almost as good as the full size vertical.  The only drawbacks
I see with this antenna is that it needs to be in the clear.   It also has
a very narrow bandwidth maybe  30Khz.
On a SOTA activation  making phone contacts on 20 meters was quite doable
with 10 watts last year.   You will need an SWR meter with a needle to
catch the quick dips as you tune the loop.

 bye Richard
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[Doug Turnbull]

Dear OMs and YLs,
     When using the AlexLoop one always at a minimum starts out with the
antenna tuner bypassed and normally you leave it that way.   I have had
occasion to use the AlexLoop mounted atop a steel reinforced concrete wall
and found that the minimum SWR was not good enough so I used the KX3 tuner.
The location was very good and I still made some good QSOs.   Without doubt
I should have moved but the location was convenient as I had use of a part
bench looking out over the considerable height of Monticatini Alto in
Tuscany ( Italians please forgive my spelling).    

     With the AlexLoop or any magloop close by you can tune it and the
narrow band properties are not a big deal.   It certainly is easier to shift
form 20M to 40M with an AlexLoop than with a portable vertical type antenna.

                      73 Doug EI2CN

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of
Richard Donner
Sent: 13 July 2016 04:15
To: [hidden email]; [hidden email]
Subject: [Elecraft] {OT} Alexloop Walkham Antenna

Hi Stan
    I own an AlexLoop  and a few of us hams went into a park and did some
 signal comparisons on  20 meters.   We compared an
Alexloop,  a full size vertical with four radials, and a 1/2 wave  end fed
for 20 meters.
I used an a/b switch on receive and transmit.
The vertical beat out the other antennas by less than an  an s unit.   The
Alexloop was almost as good as the full size vertical.  The only drawbacks
I see with this antenna is that it needs to be in the clear.   It also has
a very narrow bandwidth maybe  30Khz.
On a SOTA activation  making phone contacts on 20 meters was quite doable
with 10 watts last year.   You will need an SWR meter with a needle to
catch the quick dips as you tune the loop.

 bye Richard
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Help: http://mailman.qth.net/mmfaq.htm
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