Skip to main content

KH6JRM's Amateur Radio Blog

Another week at the KKBG-FM/KHLO-AM news
room is just about over.  There has been plenty of
events to keep this new hound busy--from that BP
oil leak to the latest crisis in the Middle East.  After
the morning shift, I'm more than ready to head for
the shack for some quality radio time.  The 20-
meter vertical dipole is working well.  The antenna
is supported by a 31-foot "jackite" mast and fed
with 450-ohm balanced line.  I've put a bit of top
and bottom loading to compensate for the short-
ness of each element (about 1 1/2 feet).  The
dipole fees well and the old Drake MN-4 seems
to match everything up.  The antenna is usable on
20, 15, and 10 meters.  The performance on 40
leaves a lot to be desired, but I have a separate
40 meter vertical elsewhere in the yard, so that
band is not a problem.  Getting on 80 meters is
a tad difficult from my postage stamp lot, but
perhaps I can erect a homebrew vertical helix
tuned for 80 meters to take care of that band.
The 40-meter loop under the house works very
well for local contacts--its original purpose.  My
antennas are mostly invisible, since I can swivel
the verticals to ground level when they are not in
use. None of these skyhooks will break a pile-up,
but I do manage to get a good signal on the air and
have some fun.  The beam will have to wait until I
get the house built on a 2-acre property south east
of Hilo.  I then will have room to erect some decent
antennas.  For now, I operating and that's good
enough for now.  Have a good weekend, 73 and
Aloha from the Big Island.  KH6JRM.


Popular posts from this blog

G5RV Multi Band HF Dipole Antenna. Post #1555.

If you can't see the video, please insert this title URL into your browser search box: This well-produced and richly illustrated tutorial on the classic G5RV HF Dipole Antenna was presented to the Brandon Amateur Radio Society in Brandon, Florida in 2017 by Bernie Huth (W4BGH).  Bernie does an excellent job of  explaining the pros and cons of this popular HF antenna from the late Louis Varney (G5RV).  Although Varney envisioned his design primarily as a 3/2 wavelength antenna for the 20 meter Amateur Radio band, radio amateurs have used the antenna for multiband use.  The G5RV is an excellent choice for the 20 meter band.  Performance on other HF Amateur Radio bands is good enough to qualify as stand alone HF antenna if you can only erect one HF antenna. For the latest Amateur/Ham Radio news and information, please visit these websites: (a wee

Amateur Radio Bicycle Mobile Setup. Post #1554.

If you can't see the video, please insert this title URL into your browser search box: Here's a way to use Amatuer/Ham Radio while you work on shedding a few pounds in useful exercise.  Why not equip your bicycle for 2 meter/70 cm mobile operation? In this short, well-made video, "taverned" shows us how he used a mag mount antenna, a simple C clamp, and a basic ground system to convert his mountain bike into a mobile station.  The project is straight forward, simple, and gives you emergency communications while you peddle down the road. For the latest Amateur/Ham Radio news and information, please visit these websites: (a weekly podcast which is updated each Friday afternoon). (Amateur Radio News & Information).

An 80-Meter Vertical Helix

Like many amateur radio operators, I live on a small lot surrounded by neighbors, utility lines, and civic-minded citizens concerned about the "attractiveness" of my community.  Whether by design or outright fear, I've adopted the "stealth" approach to ham radio antennas.  It's the old "out of sight, out of mind" idea applied to amateur radio antennas. The amateur radio press is full of articles describing the struggle of amateur radio operators to pursue their hobby under the burdensome regulations of CC & Rs, HOAs, and other civic minded citizens who object to antenna farms.  So far, my modest verticals, loops, and inverted vees have blended well with the vegetation and trees bordering my small backyard.  Vertical antennas have always been a problem because of the limited space for a radial system.  There are times, however, where a shortened vertical for the lower HF bands (such as 80/75 meters) is necessary where horizontal space is lack