N2MH Information for Rovers
N2MH/R Photo Scrapbook - Tri-Cities Hamfest, Gray, Tennessee,
Some views of the "Lighthouse Rover", N2MH/R, at the Rover
Gathering at the Tri-Cities Hamfest in Gray, Tennessee, on October 16,
1999. There are also views of the three other Rovers who came to the
hamfest and set up their stations:
- N4OFA - "The Red Rover" - Greg, KB4NVD and Mike, N4OFA
- NT4L - "Buttercup" - Robin, KB4IDC and ..., ....
- KD4MYE - Roger, KD4MYE
|Karen and Mark, N2MH, assemble the 2-element 6 Meter Moxon
Rectangle Antenna. The antenna is constructed from 3/4" aluminum
|The "Iwo Jima" shot... Mark, N2MH, and Karen placing the 2-element
6 Meter Moxon Rectangle Antenna mast into the tripod stand. To the
right, on top of the Jeep, can be seen the 5 element yagi for 144
MHz, and the 8 element yagis for 222 and 432 MHz.
||Success! The Moxon Rectangle is up and in the air! Notice the
competition next door to the left.
|Ooops... Need some more work! Stablilizing the 6m Moxon Rectangle.
The parking lot had a slight slope and the antenna tended to tip
over. Bracing it to a pole on top of the Jeep took care of the
|A used TV ENG truck can do wonders for a Rover! This vehicle belongs
to Roger, KD4MYE. The 2m vertical is about 40 feet above the roof of
the van. The rovers on either side look puny in comparison.....
|How big is that thing really going to be???
||This is "Buttercup", the pride and joy of Robin Midgett, KB4IDC,
one half of the NT4L Rover team. You should notice antennas covering
50 through 1296 MHz as well as a droopy dipole for HF.
As shown, the antennas are in their full upright position. When
lowered, the mast telescopes together leaving about 6 inches spacing
between antennas and providing enough clearance to go under
overpasses, trees (mostly), etc.
|A view of all four Rovers who attended and set up their wares. From
the left, "Buttercup", NT4L/R, "Red Rover", N4OFA/R, KD4MYE/R, "The
Lighthouse Rover", N2MH/R.
||Another portrait of the four rovers who displayed their rigs.
|Karen (YL of N2MH), Greg, KB4NVD, and another ham discuss various
|Karen (YL of N2MH), Robin, KB4IDC, and Greg, KB4NVD discuss additional
pressing Rover things.
|Mike, N4OFA, in front of his "Red Rover". Red Rover covers 50 through
||Another view of the "Lighthouse Rover", N2MH/R. All antennas are
home-brew and are (from top to bottom):
- A 6-Meter Moxon Rectangle
- An 8-element "Elephant Gun" yagi for 432 MHz
- An 8-element "Elephant Gun" yagi for 222 MHz
- A 5-element shortened "Elephant Gun" for 144 MHz.
The 8-element yagis were measured at the Enfield, Connecticut, VHF
conference on their Sunday morning antenna range to have 10.3 dBd of
gain on their respective bands. K4VX originally designed the Elephant
Gun yagi for 10 meters (where it was 55 feet long!). I took his design
and his yagi software and scaled it for 222 and 432.
The Moxon Rectangle is constructed from 3/4" aluminium angle, 3/4"
square lumber, and 1" PVC pipe, all from The Home Depot. Design ideas
came from L.B. Cebik, W4RNL. The
beams are constructed from 1x2 lumber and 1/4" copper tubing
(straightened out), again from The Home Depot. The mast material is
chain-link fence post tubing. The roof rack on the Jeep is made from
1x2 lumber and 3/4" square lumber. The 3" PVC pipes are used for
transporting the wooden yagi booms and the 10 foot long masts. The
tripod is a heavy-duty tripod stand from Radio Shack and was suitably
reinforced to prevent sagging. Finally, the rotator is a Radio Shack TV
rotator and is powered by an inverter in the Jeep.
The Home Depot
- my favorite antenna store!
Almost all materials for the beam antennas came from The Home Depot:
- 1"x2" wood for the booms, antenna spacers, and roof rack
- 1/4" copper tubing for the elements and gamma match
- small hose clamps for the gamma match
- 3/4" aluminium angle stock
- various 1/4"x20 hardware to keep the whole thing together
- 1" and 1-1/4" PVC pipe to transport elements
U-Bolts, rotator, and the foam wire for the gamma match came from
This page last revised on September 7, 2000.
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