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Author Topic: Magnetic loop on 6 meters  (Read 1964 times)
TTOMAS59
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« on: October 03, 2012, 01:36:35 PM »

Most magnetic loop antennas are rated up to 10 meters in frequency. What prevents them from use on 6 meters? A loop made from a five foot  (1/4 wave) one inch diameter copper pipe would be inexpensive.

Tim
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N3OX
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« Reply #1 on: October 03, 2012, 01:45:20 PM »

I suspect it's because most people want a magnetic loop that covers down to 20 or 17m.  A very wide tuning range with a magnetic loop is hard to achieve.

If you're lucky you might be able to make a 17m-6m magloop but I bet it would be more like 15m-6m, and it's only in the past few years that 15 and up have been any good this cycle.

So you can certainly build a 6m magloop if you're looking for a small 6m antenna. 

The sort of 6m Halo antenna with added capacitance is like a magloop but often out of the of the "small loop" regime:

http://www.nx7u.net/HiPar.html

If you want smaller loops, just scale the plates up. 
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73,
Dan
http://www.n3ox.net

Monkey/silicon cyborg, beeping at rocks since 1995.
VE3WMB
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Posts: 288




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« Reply #2 on: October 03, 2012, 08:26:16 PM »

Here is a 6m one built by Alex, PY1AHD (designer of the AlexLoop) :

http://www.alexloop.com/artigo31.html

Michae VE3WMB


Most magnetic loop antennas are rated up to 10 meters in frequency. What prevents them from use on 6 meters? A loop made from a five foot  (1/4 wave) one inch diameter copper pipe would be inexpensive.

Tim
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TTOMAS59
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« Reply #3 on: October 04, 2012, 12:53:25 PM »

I tried to load up an MFJ-935B loop tuner on 6 meters using a 4 foot long loop but I would not tune properly. Minimum swr on the radio corresponded with minimum output and vice versa.

Tim
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