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Showing posts with the label Amateur Radio

Simple Ham Radio Antennas--A Simple Wire Antenna Tuner. Post #325.

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If you're looking for a basic, simple antenna transmatch ("tuner") for that "long wire" or random length wire connecting your transceiver to the "ether", you've found the right place. Stan Gibilisco (W1CV) provides an easy to understand tutorial on how to build a random wire antenna "tuner" for your QTH or for that portable operation on the weekends. The "tuner" can also work with end-fed half-wave antennas. It's important to have a good ground or radial system with this type of antenna. I built a similar antenna transmatch during my Novice License years (1977-1979) and got a lot of enjoyment and contacts with it. As I recall, I was using a Heathkit HW-101 transceiver attached to a 100-ft/30.48 meters wire strung up in a tall Norfolk Pine Tree. My radial system consisted of an 8-ft/2.43 meters copper ground rod with four, 33-ft/10.06 meters radial wires attached and buried about 1 inch/2.54 cm below the lawn. My feed

Ham Radio Tutorial - Intro To The HF Bands. Post #324

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While this excellent tutorial by N7TFP is aimed at newly licensed General and Amateur Extra Class licensees, it contains valuable refresher material for those of us who've been out of the hobby for a while and need to catch up on some basic principles. Much of the tutorial is spent on explaining the differences between VHF and HF operations, including propagation, antennas, frequencies, and modes available for the new General and Amateur Extra Class license holders. The discussion centers around two popular amateur HF bands--80 and 20 meters. The conversation and discussion of these bands is brief, but unhurried. This would be a nice video for "elmers" (mentors) helping newly licensed amateurs get on the air. For the latest in Amateur Radio news and events, please check out the blog sidebars. These news feeds are updated daily. Aloha es 73 de Russ (KH6JRM).

Simple Ham Radio Antennas: A 2 meter VHF Handheld Ground Plane or Tiger Tail Antenna. Post #322.

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Most of the " rubber duckie" antennas that come with 2 meter handheld transceivers leave a lot to be desired. You can get better performance out of your HT by either buying a commercially-made telescoping 1/2 wave or 5/8 wave metal rod antenna or by simply adding the missing half of the antenna by attaching a " tiger tail" counterpoise wire to the base of your stock "rubber duckie" antenna. This video does a fairly good job of describing how to make an inexpensive "tiger tail" that helps your "rubbie duckie" antenna perform better. I made one of these "tiger tails" for my old Kenwood TH-21A HT. When I'm in Hilo, Hawaii , I can now reach all East Hawaii repeaters with the low power setting (.1 of a watt) on the old Kenwood HT. I soldered a ring connector to a 19-inch/48.26 cm length of #22 AWG hookup wire and attached the ring to the base of the screw-in "rubber duckie" antenna. With the "tiger

Simple Ham Radio Antennas: A Portable HF Ham Radio Antenna. Post # 321.

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Helpful video by Dave (W0ZF) on how to build a simple portable antenna for the amateur radio bands .  The antenna, whether it be for 20 meters, or some other band , is simple, inexpensive, and easy to build.  I've built several 20 and 40 meter versions following Dave's general example.  All have worked very well with powers in the QRP range (1-10 watts).  I got my speaker wire from Radio Shack , the pole was a telescoping fiberglass fishing pole I found at The Sports Authority , and the nylon string, insulators, and coax I had around the shack.  Although you can get by with just a vertical element and a "counterpoise" wire lying on the ground, you will get better performance if you use several elevated radials below the base of the vertical element.  I have a 40 meter version of Dave's antenna which is erected in the backyard of my one-acre property.  I used a 33-ft/10.06 meters MFJ telescoping fiberglass pole, 32-ft/9.75 meters of #18 gauge speaker wire f

Simple Ham Radio Antennas: The End Fed Halfwave Vertical. Post #320.

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A curiously fascinating "shoot out" between a 135-ft/41.15 meters OCF dipole antenna mounted 40-ft/12.19 meters above ground versus a 31-ft/9.45 meters halfwave vertical sitting on an apartment deck. The empirical "test" of Tony's (W1ZMB) OCF dipole and Stan's (WB2LQF) halfwave vertical shows that the simple vertical halfwave antenna performs almost as well as the OCF. The halfwave vertical has a few advantages over its fully extended OCF dipole cousin: It has a high feed point impedance which makes it efficient; it's simple to build and relatively inexpensive to assemble; it's versatile for both home and portable use; it doesn't require a ground radial system; and it can be used in a variety of configurations--sloper, inverted "L", or horizontal. All you need is a 31 ft/9.45 meters telescoping fiberglass pole (Jackite or MFJ), a homebrewed 9:1 balun, enough wire for a half wavelength vertical at your favorite frequency, a convenien

Simple Ham Radio Antennas: Dipole and Inverted V Basics. Post #316.

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Sometimes, simple is best. In the case of amateur radio antennas , an easily constructed dipole or inverted v antenna will get you on the air quickly at minimal cost. Dave Turlock 's video is a basic, well-explained tutorial on how dipoles and inverted v antennas work. Dave covers construction techniques, mounting of the antenna, and tuning of this simple, yet effective antenna. For monoband use, use a good grade of 50 ohm coaxial cable for your feedline. If you wish multi-band capability, use 300 ohm TV twin lead or 450 ohm ladder line for the feedline. This type of feeder must be used with a balanced antenna tuner or fed into a 4:1 balun and then connected to your antenna transmatch ("tuner") with a short piece of 50 ohm coaxial cable. Either way, your new dipole should be mounted as high as you can without endangering your safety. My last inverted v was designed for 40 through 10 meters by cutting the radiating segments to my lowest preferred frequency (7.

Simple Ham Radio Antennas: A portable HF vertical antenna for 20 meters. Post #314.

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.If you need an emergency or portable antenna for 20 meters, then this video by Dave (W0ZF) will get you on the air quickly and inexpensively. The only materials I had to buy were some nylon rope and a telescoping fiberglass fishing pole from the Hilo " Sports Authority " outlet. The pole cost me $30.00. I followed Dave's instructions and soon had a light weight portable antenna that performed well in a local beach park I used for testing. The vertical element should be a quarter wavelength for the 20 meter frequency of your choice. I chose 14.200 MHz and cut my vertical element and my radial wires to a length of 16.47 feet (16 feet, 5.6 inches)/5.02 meters. My coaxial feedline was 50 feet/15.24 meters of RG-8X coaxial cable with UHF connectors. I used a spare Budwig Hi-Que center coax connector to attach the antenna elements, with the + side connected to the vertical element and the - side connected to the ground radial system. My antenna wire and radials wer

Simple Ham Radio Antennas: A Ham Radio 10 meter ground plane antenna. Post #311.

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Another great video tutorial from antenna guru Dave Tadlock. This time, Dave designs, builds, and uses a simple ground plane antenna for 10 meters. Although Dave says his design can be ground mounted, a true ground plane antenna is always elevated to decouple the radials from the actual ground to eliminate ground losses. Dave's instructions are clear, precise, and often humorous. I've built several ground plane antennas following Dave's lead. The hardest of the lot was for 40 meters. In order to get the radial system off the ground, I had to use a slingshot and a length of weighted nylon rope to shoot the vertical element to a branch about 40 ft/12.19 meters above ground. With the bottom of the vertical element at 7 ft/2.13 meters above ground, it was easy to attach four, sloping quarter wave radials to the coax connector and tie them off at pre-positioned stakes. It's a lot easier to build a 10 meter ground plane. If you chose a frequency of 28.400 MHz (in t

Getting started on Ham Radio 2M FM, Part 2. Post #309.

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Here's part 2 of Randy's (K7AGE) series on getting started on Ham Radio 2 meter FM . In this easy to follow video, Randy shows you how to program the popular ICOM IC-V80 Sport HT, how to get on the air quickly, and to how to use the basics of FM operating to your best advantage. Randy's videos can be used as basic a basic 2 meter tutorial for newly-licensed hams or to refresh the memories of some of us old timers who don't use 2 meters as often as we should. Overall, Randy has done a good job of covering the essential operating protocols for the 2 meter Amateur Radio band. For the latest Amateur Radio news and events, please check out the blog sidebars. These news feeds are updated daily. You can follow our blog community with a free email subscription or by tapping into the blog RSS feed . Until next time,Aloha de Russ (KH6JRM).

Getting started on Ham Radio 2M FM, Part 1. Post #308

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Are you a newly licensed amateur radio operator and want to get on 2 meter FM with a minimum of hassle and problems? Then, this well-produced video by K7AGE is for you! Even though I've been an amateur radio operator since 1977, I always learn something new about the hobby by consulting hams who've been in the hobby for many years. K7AGE is an excellent "elmer" (mentor) and takes you step by step into the world of 2 meter FM using the popular Icom IC-V80 Sport VHF hand held transceiver. This is part 1 of a three-part study of 2 meter FM. For the latest Amateur Radio News and Events, please check out the blog sidebars. These news feeds are updated daily. Aloha es 73 de Russ (KH6JRM).

Simple Ham Radio Antennas: M0VST's 50 meter longwire antenna set up. Post #307.

This short video by M0VST covers most of the basics involved in making an effective longwire antenna, covering the amateur radio bands between 160 to 10 meters . I've built several of these "longwire" antennas and have found that an ATU ( antenna tuner ) and a good counterpoise system really help to produce a quality signal. Unlike M0VST's "longwire antenna", my version was cut to a length of 67-ft/20.42 meters, enough to cover amateur radio bands between 80 and 10 meters. My counterpoise system was a compromise arrangement consisting of four, quarter wave radial wires for each band of use (80, 40, 20, 15, and 10 meters). I also attached a "quarter wave radial bundle" to the ground lug of my trusty Drake MN-4 ATU. I used approximately 60 ft/18.29 meters of 450 ohm ladder line as the antenna feed line. The ladder line was attached to a W9INN 4:1 balun. A 6-ft/1.82 meters length of RG-8X with UHF connectors ran from the balun to the wi

Simple Ham Radio Antennas: A $4.00 Ham Radio Satellite Antenna. Post #305..

I admit it. I tend to procrastinate too much these days, always delaying a simple project because something else gets in the way. But not today. I've been looking for a simple, inexpensive hand-held 2 meter/70 cm yagi satellite antenna for working the SO-50 and other FM radio satellites. With the number of microsats, Cubesats, and edu-sats in orbit these days, there is no excuse for not building your own antenna for these "birds". Most modern handhelds can be used to contact these satellites with a decent antenna. So, following some of the advice given by Dave Tadlock in this video, I decided to collect the necessary materials for this ultra simple antenna. Fortunately, I had most of the materials at the QTH and was lucky enough to have a neighborhood True Value store not far from my home. The antenna works quite well when I can time the passes correctly. At times, my arm gets a bit tired, but that issue can be solved with a camera tripod or some other device

Simple Ham Radio Antennas: The Extended Double Zepp Antenna. Post #304

This historical amateur radio antenna is becoming a bit more popular these days because it delivers modest gain over a horizontal dipole (about 3 dB) and is simple to build. This video by Stan Gibilisco covers all of the basics of this antenna and its construction. While it is perhaps best to use two supporting masts for the antenna, it can work reasonably well configured as an inverted vee. According to Stan, the EDZ antenna is basically "a collinear array of two 5/8 waves in phase." So, each antenna element will be a bit longer than the dipole most of us are accustomed to building. Also, the usual dipole formula, 468/f(MHz), doesn't apply here. After consulting several texts and antenna books, I chose to use the formula 585/f(MHz) for my EDZ Antenna. My last EDZ was cut for 20 meters and it worked very well. This time around, my property is a bit larger and I thought a 40 meter EDZ configured as an inverted vee would fit within my property without being seen by

Simple Ham Radio Antennas: A Portable 2 meter/70 cm Ham Radio Antenna. Post #303

KF7ETX has built an easily assembled portable VHF/UHF antenna system that can be set up most anywhere, from your home to an emergency station in the country. All it requires a painter's pole support mast , three paracord guy ropes , a dual-band 2 meter /70 meter antenna, and some low-loss coaxial cable. I have a similar arrangement at my QTH, where I use a homebrewed 5/8 wavelength 2 meter antenna supported by a 33-ft/10.06 MFJ telescoping fiberglass mast. The mast is secured by clamps on the side of my garage. I feed the antenna with 50-ft/15.24 meters of RG-213 coaxial cable. The mast can also be broken down for portable use. The antenna works very well from my rural location. The antenna used in this video by KF7ETX can be made from locally available materials from the nearest hardware or home improvement outlet. This is a simple, effective antenna that will give you hours of fun at your favorite park, beach, or mountain top. Have fun. Aloha es 73 de KH6JRM.

Simple Ham Radio Antennas: Stealth Amateur Radio Antenna System (7 MHz to 1.3 GHz) AKA HDTV antenna. Post #302.

Here's a curious design for a stealth antenna from Jim Whitaker . The antenna appears to be a type of Off Center Fed Dipole ( OFCD ) capable of working on 40, 20, 15, 10, 6 meters . The antenna functions as a discone for 6 meters, 2 meters, and 70 cm. I've built a few OFCD antennas , but they didn't look like Jim's. You may want to test Jim's idea if your antenna space is limited or discouraged by HOAs and CC&Rs.For the latest Amateur Radio News and Events, please check the blog sidebars. These news feeds are updated daily. Aloha es 73 de Russ (KH6JRM).

Maximize 2 Meter HT or Dual Band Radio Performance With This Easy Tip. Post #301.

Are you dissatisfied with the performance of your HT? Perhaps the cause of your concern is the "rubber duckie" antenna supplied with your radio. Larry Shaunce (WD0AKX) shows how adding a simple counterpoise wire to the base of your HT's antenna can supply the missing half of a dipole antenna. This simple addition can add just enough "push" to hit that distant repeater without resorting to higher power or an amplifier. I tried Larry's idea on my old Kenwood Th-21A FM transceiver. I kept the old "rubber duckie" antenna and added a 19-inch/48.26 cm length of #22 AWG hookup wire as a counterpoise. With this cheap, easily made modification, I was able to hit all of the 2 meter repeaters in the Hilo, Hawaii area with full quieting. This antenna is sometimes called a "Tiger Tail". You can find variations of this antenna on several web sites. Larry's explanation is excellent and down-to-earth. Great video. For the latest Amateur

ARRL National Centennial Convention 2014 - FEMA Administrator Craig Fuga...

This is post #298. Fugate spoke before some 800 guests at the Friday evening ARRL Centennial Convention banquet in Hartford, Connecticut. Earlier that day, he and ARRL President Kay Craigie (N3KN), signed a memorandum of Agreement (MOA) aimed at enhancing cooperation between the ARRL and FEMA in the area of disaster communication. In his remarks at the banquet, Fugate said that before he even became FEMA administrator, it became clear to him that Amateur Radio could support ad hoc and innovative communication without relying on conventional telecommunications systems. In his remarks, Fugate noted that "The more sophisticated our systems become, the more fragile they become...the relevancy of ham radio only grows...Amateur Radio is taking that hobby and turning it into saving lives." Earlier, Fugate upgraded to the General Class Amateur Radio License. After Fugate's talk, President Craigie presented him with the ARRL Medal of Honor. Aloha de Russ (KH6JRM).

Simple Ham Radio Antennas. The Open-Wire Dipole (Doublet). Post #293

I'm still in the process of restoring my "antenna farm" after the passing of Tropical Storm Iselle on 07-08 August 2014.  I lost a few trees on my Orchidland Estates property, most of which were supporting several HF wire antennas.  I salvaged most of the wire and the 450 ohm feedline from the storm.  While I cleaned up the mess, I erected a simple multiband vertical antenna using a tall Norfolk Pine Tree as an antenna support. Next on the list is the restoration of my approximately 134-ft/40.85 meters  center-fed horizontal dipole.  The antenna is fed with 450 ohm ladder line which goes into a W9INN 4:1 balun and then via a short length of RG-8X coax into a MFJ 941E Versa Tuner II.  This feed arrangement allows multiband coverage from 3.500 MHz through 29.000 MHz. Although the antenna requires two tall supports (trees or masts), construction of the antenna is simple and the dipole doesn't require a ground radial system. Using the general formula, 468/f(

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

Hawaii County Mayor declares Amateur Radio Week in Hawaii County. Post #281.S

Source:   Hawaii Tribune-Herald , 14 June 2014. Reporter:  Bob Schneider (AH6J), ARRL Pacific Section Manager. In tribute to Hawaii Island hams who provide emergency communications for Hawaii County during times of natural or man-made disasters, Hawaii County Mayor Billy Kenoi has declared 23-29 June 2014 as "Amateur Radio Week" in Hawaii County.  Mayor Kenoi has urged the public to support the American Radio Relay League 's (ARRL) Field Day events set for Saturday, 28 June 2014, when amateur radio club members will set up and demonstrate emergency communications equipment and skills. In Hilo , the public is invited to activities hosted by the Big Island Amateur Radio Club (BIARC) from 8 a.m. to 5 p.m. at Walmart.  A Field Day station will be operational from 8 a.m. Saturday until 8 a.m. Sunday at the Wailoa Visitor Center in Hilo.  During that 24-hour period, local ham operators will contact other amateur radio operators across the Pacific and North America.