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Showing posts from August, 2014

Simple Ham Radio Antennas: Antenna Basics. Post #291

One of the joys of being semi-retired, is the ability to attend a few more face-to-face meetings with your amateur radio friends.  Such was the case today, Thursday, 28 August 2014.

My xyl had a substitute teaching assignment today, while I didn't.  That gave me some time to go shopping, do the laundry, take care of a few commercials for this weekend's Labor Day Drag Races (I'm the tower announcer and report back to several Hilo radio stations with race results), and meet up with a few ham friends who gather daily at the Hilo Jack In The Box Restaurant.

The meetings are quite informal, with most of the discussion centered around antennas, homebrew projects, and various communications issues.  Despite having 37 years of amateur radio experience "under my belt," I always find something new and interesting at these meetings.

One of the things that has always bothered me is the amount of misunderstanding surrounding antennas, both homebrewed and commercial.  It's ha…

Simple Ham Radio Antennas: A 3 Band Delta Loop. Post #290.

While I was looking for some loop antenna ideas to try out at my new QTH, I came across this article. Great video which contains numerous approaches to designing and building a multiband delta loop antenna. I will try a variation of this antenna for 40-10 meters using 450 ohm ladder line as the feed line. Aloha, Russ Roberts (KH6JRM).

The Pine Tree HF Stealth Vertical Antenna. Post #289.

Now that Tropical Storm Iselle has left the state of Hawaii, those of us on Hawaii Island can complete the massive task of clearing roads, restoring power, and, in some cases, rebuilding our homes.

Damage to my home was minimal with only fallen trees and "disassembled" wire antennas to be cleared from the property.  Our subdivision in the Orchidland Estates area of the Puna District escaped serious damage with only power interruption and blocked roads presenting major difficulties.

When I surveyed the damage after the passing of the storm (07-08 August 2014), it soon became apparent that most of my "antenna farm" would have to be rebuilt.  The only antennas left intact were the 40/15 meter inverted vee and the NVIS 40 meter loop, which were lowered before the storm.  My 135-foot/41.15 meters doublet lodged in a 45-foot/13.71 meters tall eucalyptus tree was torn to shreds by windblown branches and fallen debris.  I did salvage the 450-ohm ladder line, a few insulators…

Back From the Dead. Tropical Storm Damage Repaired. Antenna Blog Returns. Post #288

July and August 2014 have proven to be exciting and somewhat terrifying months for those of us who call Hawaii Island our home.

Earlier, I announced that this antenna blog would relocate to my amateur radio news site (http://kh6jrm.com) until I worked out some issues with my ISP and the continuing move to my new QTH in the Orchidland Estates area of the Puna District.  I transferred all antenna articles to that site, as well as keeping the original articles here.

Things turned upside down when Tropical Storm Iselle came ashore on 07 and 08 August 2014.  Many homes in the Puna and Ka'u Districts were cut off by fallen trees and loss of utility poles.  One of those houses was mine, but thankfully, the only loss was the temporary cut in electric power (restored after 3 days) and the removal of fallen trees from my access road.  At the time of the storm, I was working as a reporter from the Hawaii County Civil Defense Office for my former employer, Pacific Media Group, the owner of 4 ra…