Dipole and Inverted V Antenna Basics

One of the first antennas I rebuilt after the passing of Tropical Storm Iselle (o7-08 August 2014) was my trusty 80-10 meter inverted v.  The previous inverted v was torn up badly by 60-65 mph winds from the storm.  I managed to salvage most of the 450 ohm ladder line and a good portion of the antenna segments.  While I was researching for better ways to “harden” my wire antennas, I came across this helpful article by Dave Tadlock on the construction, mounting, and tuning of dipole and inverted v antennas.  While I incorporated much of Dave’s ideas, I elected to keep the inverted v as a multiband antenna, covering 80 through 10 meters.  With 450 ohm ladder line fed into a 4:1 current balun and using a short length of RG-8X coax to connect the balun to my trusty Drake MN-4 transmatch or the standby MFJ 941-E Versa Tuner II, I had an antenna capable of serving these amateur radio bands.  Each antenna element was 67-feet/20.42 meters long, giving me resonance at approximately 3.500 MHz.  With the ladder line, balun, and transmatch combination, I was able to get a 1:1 SWR on all amateur radio bands between 80 and 10 meters.  Dave’s video is well organized and loaded with many valuable hints.

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Until next time,

Aloha de Russ (KH6JRM).

Ham Radio: Portable Antennas on Saddleworth Moor.

1st outing on the moor as an Intermediate licence holder, trying out a couple of different portable antennas.

Source: www.youtube.com

Nice video from a new intermediate license holder in the UK.  He tries a variety of portable antennas on a brief trip to the moors.  Lots of valuable antenna dos and don’ts in this video.  Part of the fun in amateur radio is experimenting with antennas.  Each time we build an antenna, we learn something.  Good video.  Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

KH6JRM’s Amateur Radio Antenna Topics: Simple Ham Radio Antennas. The Open-Wire Dipole (Doublet). Post #293

Open-Wire Dipole Antenna (Doublet). (Simple Ham Radio Antennas. The Open-Wire Dipole (Doublet).

Source: kh6jrm.blogspot.fr

Here’s the latest article from my Amateur Radio Antenna Topics Blog (http://kh6jrm.blogspot.com).  This time, I build a simple open-wire dipole or doublet fed by 450 ohm ladder line.  This antenna replaces the one destroyed by Tropical Storm Iselle on 07-08 August 2014.  I have several antenna replacement projects in progress, thanks to the storm.  I’ll keep you posted.  Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

N3ATS.com — Antennas for Amateur Radio

N3ATS – Wire antennas for HF amateur radio and SWL.

Source: n3ats.com

Steve Weiss (N3ATS) has opened a new web store specializing in “all coax-fed antennas.”  On this post, Steve features a 4-band antenna, “which is only 42 feet (12.80 meters) long, yet is resonant on 30, 20, 15, and 10 meters if hung at 30 feet (9.14 meters).  For more information, visit http://n3ats.com.  Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

The 10 Minute Dipole.

http://www.youtube.com/watch?v=uQ4FRZ02uua).  Time:  8 min, 30 sec.

Do you need a cheap, easily erected, and effective dipole for emergency or portable use?  This video from Scott (W4PA) of Ten-Tec has all the information you need to build a simple, inexpensive dipole that will get you on the air.  It’s just a matter of “cut, solder, and tie it off.”  I built one of these antennas after Tropical Storm Iselle leveled my “antenna farm” at my new QTH in the Orchidland Estates area of the Puna District.  The antenna isn’t fancy, but it works.  I found all of the materials in my garage. Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

Dipole and Inverted V Antenna Basics.

http://www.youtube.com/watch?v=fyOWRTWdKM).  Time:  48 minutes, 39 seconds.

As many of you know, Tropical Storm Iselle did considerable damage to the Puna and Ka’u Districts of Hawaii Island.  My new QTH in the Orchidland Estates area escaped major damage, but I did lose several tall trees which were being used to support dipoles, inverted vees, and loop antennas.  I’m now in the rebuilding phase of my “cleaned out” antenna farm. One of the first antennas I’ll build is a multi-band inverted v fed with ladder line, covering 80-10 meters.  I found this helpful youtube video from Dave Tadlock.  Dave covers most of the important issues relating to inverted v antennas, including construction tips, mounting of the antenna, and tuning. Nice, well-paced video.  Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

Simple amateur radio antenna

job description amateur antennas for HF and VHF bands (RT @wire_antennas: Ham radio antennas http://t.co/KV1WtAI7Mm)

Source: www.2dipol.com

Another one of those intriguing antenna designs from our amateur radio friends in the Russian Federation.  I can’t vouch for the claimed 21.4 dB gain claimed in the article.  But, the antenna is interesting and would probably be fun to build and work with.  Aloha de Russ (KH6JRM).

See on Scoop.itKH6JRM’s Amateur Radio Blog

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