I built two W6NL Moxon's. I have had them in the air for several years.
They work perfectly. Nothing changes when the wind blows.
The W6NL Moxon antenna has superior performance characteristics when
compared to the Cushcraft 2 ele 40 (which I used before the W6NL design).
I do constant comparisons between the W6NL two element antennas (in a stack)
and full size 4 ele OWA antennas (stacked). There are no surprises or free
lunches. The larger antennas have more gain and more front to back, as you
However, for a 2 element Yagi - on 40 meters, with a 22 ft boom - the W6NL
Moxon's forward gain, F/B pattern, feedpoint simplicity and wide VSWR
bandwidth - the combination is tough to beat.
[mailto:email@example.com] On Behalf Of Kevin Normoyle
Sent: Sunday, July 18, 2010 4:19 AM
To: Tower Talk List
Subject: Re: [TowerTalk] Beta match adjustment
K3LR recommended the W6NL moxons.
Yeah I had looked at the various W6NL variations, and decided against them.
In the end, I'm not convinced the extra aluminum is worth it, compared
to a regular moxon made of aluminum tubing? (it is more aluminum, right?)
I think it should have been compared to another moxon, not to a 2
element or 3 element yagi?
Also, since the tip coupling is critical, I would think the unconnected
tips would cause variance when they move?
That's why I set to build just a regular moxon initially.
I tried using W6NL's nec model. Using 4NEC2, it seemed to me to be tuned
for lower frequency?
Supposedly it's dialed in though, so something must be wrong for me..
I'd be curious if anyone can run W6NL's in EZNEC and do a freq sweep.
I think that's related to what happened with my 40M simulation. I was
optimized in too high in frequency.
So somehow, I'm missing something in my simulation.
Here are my .nec that ended up being high in frequency (my bent tip with
hairpin sim). I then did one optimized for lower frequency (6.9Mhz)
You can see the gain/fb/swr bandwidth though.
I'm a newcomer to simulating, and maybe someone out there can give me
It's got the right wire seg diameters for the taper I used.
download from here:
the first "built_5_16_bent2l_40m_233boom.nec" was my sim I built from
the elements are full length, bent tips, antenna at 55' (yeah, i had an
old wt-51 laying around too I put up..)
W6NL provided an AO file for his antenna here
I converted it to NEC and it's my site above also. called "W6NL40.nec"
I'd be interested in whether people simulate that and whether it appears
low in frequency or ?? (I see 6.8mhz center point) for the w6nl40.nec at
my site. I even tried adding a boom to see if there were some effects I
wasn't modeling, but couldn't get it better.
Maybe I need NEC-4 instead of NEC-2?
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