I am a satisfied M2 user. I've had lots of experience with most of their
stuff.
I have a four high stack of the 6 el 15 meter Yagis mounted on Rohn 55.
The one element comes close to the tower but doesn't touch. You'll be OK.
On interaction between other antennas and the 40 LLDD. Out at KH6 I had
the 40 mounted about 10 feet below a KT36XA and noticed a little different
SWR on that XA on 15 . As I would rotate the one antenna (sidemount) I
could see the SWR change maybe .2 on 15. I noticed no interaction on the
other
bands.
I have the same configuration on a rotating tower. The 40 meter Yagi is
at 100 feet and I have a stack of XAs at 90/60/30. I notice very little
difference on the antenna at 90 and the one down at 60 for 15 meters.
That being said, I'm sure there is some degradation on the 15 pattern.
Given a choice I would keep the 15 meter Yagi at least a 1/4 wavelength away
for the 40. those two never make a great combo.
As far as people complaining about the 40 LLD... I don't understand why.
I have three of them here. Two I got out in KH6 in 2007 and had them up
for four years with no problem. I put them up here in FL and have had no
problems with them. The third I got used and replaced some rusty hardware and
have had that one up for three years. Again, no problems.
Beware on the 15meter 6 el Yagi. The boom is spongy. I would suggest
putting a pair of side trusses on that one.
Finally, the K4XS superstation will be changing hands to a new owner on
April 10. Where ever I head off to, getting M2 antennas will be a strong
consideration. Mike has some quality stuff.
K4XS/KH7XS
In a message dated 4/4/2015 1:02:11 A.M. Coordinated Universal Time,
rxdesign@ssvecnet.com writes:
I’m thinking of a 2 stack of the M2 15M6DX. Both antennas would be mounted
across the face of Rohn 55 (rotating tower)... unfortunately their manual
doesn’t say what the distance is to the mast/balance point and it looks
rather close to D2. I asked the factory what the distance was and even though
its been in production for years – they basically said they didn’t know
and didn’t have a CAD drawing for it! Seems very odd to me ... so instead I’
m here asking if anyone has one of these up and if they know what the
approximate distance is from the balance point to the closest element?
I’m also considering a 40M4LLDD (although the comments by some about
linear loading tend to worry me – the reviews from those that are using it are
all positive – albeit without a direct A/B comparison we all know how
relative it all is) ... and was wondering if anyone has one of these close to
either a 20 and/or a 15. I’m planning on ~12’ from the 20 to the 40 and ~31’
from the 40 to the top 15... looking to see if there’s any interaction at
all. I can move the 40 to a different tower with a bit more work IF indeed
there is some interaction noted.
Thanks to those that own one for their comments.
Gary K9RX
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