Sawa, JR3TVH writes:
have been seen your site since you started your site
here and have been just looked at many experimenter's
reports from many countries included the Mr.Cebik's
data. I have been tried many types of Moxon for years,
and since I found out this antenna works very reliable
beyond my SIM designs and believe something as below
at my IOTA operations from remote islands. As though
I love a fishing rod -vertical every operation and vertical
dipole like SVDA recently. Here is a review of my MVAP:
Just from my experience, Moxon Vertical Arrays
I arranged some Moxon vertical arrays of the participants
here published, that performs similar to the normal
vertical dipole arrays, SVDA and much more effective
to the vertical dipole or better shortened vertical
dipole from 40 to 10m.
MVAP is just a simple and light weight to install
and collapse within 5 minute even rainstorm condition.
Simulation is convenient to be done by AC6LA Dan's MoxGen
sometimes additional arrange is needed.
VMAP has a below 20 degree vertical angle and more than
5dBd as the same as 2ele Yagi and F/B ratio is the greatest
over 27dB because it has a null point becasue it has
a pattern of Cardioid. Designed his formula and checked
at any places with MFJ-259B analyzer once or twice.
Everybody could stuff one more rig or battery
and water bottles into a backpack or a waterproof box
or could reduce some pounds so that could protect even
the risk of life on the island.
As the construction is very simple with NO matching
unit but has a sophisticated performance at the height
of some feet on the reef or soils. Two fishing rod,
ropes, pegs and light, thin wires for your band expected
those ar just pre-installed last night for example(
w/wo a 1:1 bulun.) I designed for the impedance is optimized
at 50ohm without any matching unit. But some adjustment
was needed at some places near the fence or blocks,
some materials as common issues.
I believe the beamwidth is like a normal vertical Yagis
so not very sharp but.. its beam angle at the sea side
should be very low and has null point then is very effective
when I hear DX signals and get them effectively. so
this antenna works the best for DX and local use as
a long Es prop for high bands (See the attached photos
shown are the MVAP demonstration at the local club JH3YKV
field meeting last month and some member enjoyed over
1500 km Es-QSO on 18m and even using it for 15m Es prop
w/ FC-30 ATU and FT-897). Recently I took every
island operation with some wires, 3-4mm dia. PP ropes,
RG58AU or 3D2V coax cable and fishing pole as my portable
antenna set. This antenna is designed for the place
at the seaside or on the sand, soil installations. Installation
time is within 5 miniutes and a quick-QRV on any places
because you just change to your required band wire to
hang, fix at the square corner clips.
this MVAP or Moxon vertical may be optimized for DXing.
I achieved many DXs logged in and this is inferior NVIS
or local QSO to DXing.
am one of JA-IOTA enthisiasts I would like to have some
advices to make more light weight or smaller but effective
Moxon. So Please talk about this antenna information.
I will use it at the beach or reef of Okinawa or remote
islands or archipelago.