Links-<TBD>
HL9AVT
Amateur Radio Operations in South Korea.
Korean
War Museum - Located in Seoul, the Capital of South Korea, a
must see.
Korean Links - In
English.
My Apartment HF Antenna
Living in an
apartment I did not have room for a big antenna, but I was up 10
stories so that helped some. My first antenna was basically a
random wire antenna with a MFJ tuner installed right at the feed
point. Grounding consisted of using the metal rail and a
counterpoise wire.
With winter coming I found it too much
of a hassle to go out in the cold and tune the antenna so I
replaced the MFJ tuner with a SGC-237 tuner mounted in a kitchen
food storage box. The SGC auto tuner works great, and tunes
fast!
MFJ tuner and random wire antenna about 35 ft
long.
Station
upgrade, SGC 237 autotuner ( shown mounted in plastic box, back
view) with antenna wire coiled up.
The
wooden pole is a toilet plunger that fits into the flag pole
holder on the hand rail. A coat hanger is used to get the wire
away from the building.
Shown
below is the hand rail and flag pole holder (antenna mount) and
grounding for SGC tuner. I also ran to 25 ft radials off the
railing. The ground strap cost less than a dollar at a local
Korean amateur swap meet.
Grounding
attached to SGC 237 tuner. Not shown ,I also ran a total of four
25 foot radials from the same ground lug along two the wall boards
(two along each wall). With the Radials I found you don't need the
ground strap on the rail at all and the VSWR is actually better
(lower).
This
is the final installation. weather proof and ready to operate.
This is nice, no more going outside to tune the antenna in the
cold.
When
not in use, I would bring the whole unit inside the
apartment.
Below is a picture of the quick disconnects
used. One is for the RG58, providing RF to the SGC antenna tuner
the other is providing a few milliamps at 12.8VDC to the SGC
tuner. The split bead torrid is used to help keep any RF off the
power line. 
Hope this helps others in similar situations see how to implement the SGC 237 tuner.
Copyright © 2003-2009 J. Lauben. All rights reserved.