ARRL

Secure Site Login

Forum Home - Rules - Help - Login - Forgot Password
Members can access, post and reply to the forums below. Before you do, please first read the RULES.

Are mag loops for real or hype?

Dec 17th 2016, 20:23

KJ6BQM

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
I shelled out some serious money for a mag loop antenna. I saw a website from a british ham saying that he had worked antartica on 2 watts CW from inside his house. I'm not getting anything like that. What is other peoples' experience?

So far I got one response from a local ham that I was putting out a very weak signal on 40 meters with my YouKits w/ a nominal 5 watts.
Dec 18th 2016, 03:53

W1VT

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0

I've worked a bunch of portable stations at National Parks who use magnetic loop antennas. These days, 40M is more of a daytime band if you are running QRP, though you might get lucky and work some DX just after sunrise or around sunset when the band is really long.

http://www.arrl.org/propagation
Here are some propagation charts for choosing when to operate on the different bands.

Zack Lau W1VT
ARRL Senior Lab Engineer
Dec 18th 2016, 23:57

KJ6BQM

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Thanks. i can tune the mag loop antenna to get max sound and I hear stations well. I hooked up an antenna analyzer and the best SWR I could get was 4 something. Any ideas on what ( if anything) is wrong? I am using a YouKits H1-B1 into a chameleon mag loop with the aluminum tube option.
Dec 19th 2016, 18:43

W1VT

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
http://www.worldwidedx.com/threads/review-of-the-chameleon-cha-f-loop-portable-antenna.192105/
As this review points out, indoor operation can be expected to compromise the SWR. You may try different locations to see if you can find a spot where the interaction with nearby objects in minimized.

Zack W1VT
ARRL Senior Lab Engineer
Dec 20th 2016, 01:30

KJ6BQM

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Thank you Zack. That review was very helpful. The tuning procedure for the antenna says to adjust the SWR after you tune the anrenna for max noise. The H1-B1 model I have lacks an SWR meter. I bought a little SWR meter from YouKits today ( YouKits makes the H1-B1) I hope that will help. Finally I figured out ( the documentation wasn't clear ) that you can't set it up on 80 meters with the aluminum radiator and the coax. I will see how that works.
73's

Back to Top