Performance


This antenna seems immune to noise. It is the quietest antenna I have. It nulls out completely my power line noise. It is quite directional to the east and west.

I have worked many stateside contacts with this antenna on sideband and PSK. I have worked a lot of both DX and local QSO's with very good reports.

My log shows the results, along with a comparison to the 30 degree version. The 30 degree loop is about 1 s unit stronger.

CALL
W4LIX
W0YWP
ES1WN
G0WSB
9J2AM
CR8A
ZK3DX
OH7M
R1MVZ
KH7R
OH8LQ
OT9T
DATE
8/13/99
8/13/99
8/14/99
8/14/99
8/25/99
9/19/99
10/13/99
10/31/99
10/31/99
10/31/99
10/31/99
10/31/99
TIME
2024
2030
0430
0511
0540
2354
0400
0355
0358
0401
0419
1802
FREQ
14070
14213
14267
14070
14214
14
14195
14
14
14
14
14
MODE
PSK
A3
A3
PSK
A3
A3
A3
A3
A3
A3
A3
A3
POWER
40
200
200
40
200
200
200
200
200
200
200
200
SIG
599
5x9
5x9
599
5x9
5x9
5x9
5x9
5x9
5x9
5x9
5x9
QTH,NOTES
Hagerstown, MD, Cam
Mt.Hamel, IA, James (Resource on loops)
Estonia, August
South Hampton,England,Mike
Zambia, Aki
Portugal QSL CT1EEB
Tokelou 30 deg loop
30 deg loop - 1 S unit more on 30 deg than 20 deg
Contest - 30 deg loop
30 deg loop
30 deg loop
30 deg loop


I use the magnetic wire loop a lot when there is snow or rain static on the big beam. It is located very near the power lines but it does not pick up line noise. I always receive at least 5X9 reports. On receive I can tell about 1 s unit difference (down) between this and my beam at 105' but the signal-to-noise is much better with this loop.

For DX contacts this antenna works for the easy stuff but does not compare with a beam at 105' for the far out DX. It would be a great stealth antenna to nest up against a 6' privacy fence. Antennas that don't work well for me are soon taken down and this one has lasted almost 2 years now so that is a good testimonial of how well it works.

2008 Update: Clarification is probably in order for the glowing signal reports. The beam is much higher and thus capable of more energy at lower radiation angles. That makes the beam the workhorse for DX. The loop is a good performer because of it's immunity to rain static, snow static, and power line noise but it is not a very good dx antenna. It works some dx but not like the beam.

Also I should mention that the 30 degree antenna had significant line noise, unlike the 20 degree. I suspect orientation with respect to the line noise source. Just luck because I didn't have much choice as to where I could put up the antennas. One nulls out the line noise and the other doesn't.

Both loops are history by now. I am using the posts to support a 40m NVIS dipole. Now we are waiting for the solar cycle to come back up because NVIS antennas only work when the critical frequency is higher than the antenna frequency. Right now the critical frequency on a typical day is 5Mhz.

Mark - W0QL

email: w0ql -at- hotmail.com



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