Review Exam 3 View the complete course at: ocw.mit.edu License: Creative Commons BY-NC-SA More information at ocw.mit.edu More courses at ocw.mit.edu
Video Rating: 4 / 5
Archive for month: April, 2012
Clip 5/7 Speaker: Malaysian Amateur Radio Emergency Service MARES 1. Introduction to Amateur Radio, History of Ham Radio in Malaysia 2. APRS Introduction 3. Communication with ISS, the amateur radio way 4. Emergency Communication For more information go to: bit.ly
Video Rating: 5 / 5
receiving psk-31 via pc microphone
U.S. Patents Awarded to Inventors in Arizona (April 19)
The abstract of the patent published by the US Patent and Trademark Office states: "In an exemplary embodiment, a phased array antenna comprises multiple subcircuits in communication with multiple radiating elements. The radio frequency signals are …
Read more on Targeted News Service (subscription)
First test with Arduino tuner. The Lock button on FT817 is used to tune the capacitor. On 20 and 40 meters (actually) there is a fast tuning function. On different frequencies all the capacitors course are analyzed to find better SWR. Arduino is used to drive the servo,read frequency,swr and lock command from FT817 and set FM mode for tuning.At the end of tuning procedure Arduino set again LSB or USB depending the frequency. Based on Alain De Carolis project (alain.it)
This is a new Palstar AT2K tuner that I purchased, and I hope for it to be the last antenna tuner I ever buy. So far it’s living up to that reputation flawlessly. The construction is top notch, the level of attention to detail that Palstar has put into this tuner is stellar, and I wouldn’t hesitate to recommend this tuner to anybody, even with the most demanding antenna tuner needs.
By Stan Horzepa, WA1LOU
Contributing Editor
This week, Surfin’ gets its feet wet with SDR by means of a bevy of online SDR receivers.
On the Software-Defined Radio (SDR) front, Tad Cook, K7RA, mentioned PA3FWM’s WebSDR in the K7RA Solar Update on April 13 and I mentioned it here back in June 2008. It is worth repeating because it is a very valuable online resource and it has expanded greatly since…
American Radio Relay League | Ham Radio Association and Resources
Test of the effects of radio frequency interference on the performance of digital pressure gauges.
Video Rating: 5 / 5
Solar activity revived over the past week, with a big increase in sunspot numbers. On Friday, April 20, the daily sunspot number reached 162; four days later on April 24, the number reached 169. This level of activity has not been seen since last fall, when the daily sunspot number reached 173 on September 16, 184 on October 21 and 208 on November 9.
The average daily sunspot numbers more than d…
American Radio Relay League | Ham Radio Association and Resources
Dial Knob casero para PowerSDR o Ham Radio deluxe para manejar equipos SDR o equipos convencionales
Video Rating: 0 / 5
Ham Radio Deluxe
In April, the FCC put out a Public Notice, requesting comments regarding a Congressional-mandated study to assess Amateur Radio’s role in emergency and disaster communications and the impact of private land use regulations on the amateur community’s ability to provide such communications. The ARRL asked the amateur community to forward comments directly to the ARRL so that it could use them to …
American Radio Relay League | Ham Radio Association and Resources
This is version 2 of my demo for an arduino antenna tuner. In this version I swapped the coil with a new, somewhat larger one, which has an extra connection about halfway. Using a relay (controlled by the Arduino) the inductance can be switched between half and full. In each position, the capacitor makes a full sweep, while the Arduino monitors the reflection (watch the right meter in the back!). After this, it puts the inductor and capacitor in the position with the lowest SWR. This demo is quite slow, I experimented with different speeds and was able to let it tune within 2 seconds! Details, pictures, schema and code: ernest.utreg.net
For the past 11 years, the US Office of Personnel Management has designated the ARRL to participate in the Combined Federal Campaign (CFC), the annual giving campaign for federal employees. In that time, this campaign for federal government civilian employees, US Postal Service workers and members of the military has generated almost $ 192,000 for ARRL programs. The CFC provides an easy way to s…
American Radio Relay League | Ham Radio Association and Resources
Yellowstone County siren test results
Ron Glass of the YARES organization, Yellowstone Amateur Radio Emergency Services , reported that people from their group were stationed at each siren. They reported that all sirens worked and rotated properly tonight at 6PM. The sirens are tested once …
Read more on KTVQ Billings News
WEEKEND: Other area events on North Olympic Peninsula
Those earning an entry-level license will be able to communicate with other hams worldwide and participate in the Amateur Radio Emergency Service. PORT ANGELES — The inaugural Port Angeles Cash Mob event will be held Saturday.
Read more on Peninsula Daily
Hustler QD-2 Antenna Quick Disconnect – Stainless Steel!
- Stainless Steel & Heavy Duty!
- For 3/8-24 base thread antennas!
- Quick Disconnect for Ham Radio & CB antennas!
Super Heavy Duty stainless steel quick disconnect for 3/8-24 thread antennas.
Amateur & CB Antenna use.
List Price: $ 23.98
Price: [wpramaprice asin=”B003H41MRQ”]
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NASA is now accepting proposals from US schools, museums, science centers and community youth organizations to host an Amateur Radio on the International Space Station (ARISS) contact between November 1, 2012 and May 1, 2013. To maximize these radio contact opportunities, NASA is looking for organizations that will draw large numbers of participants and integrate the contact into a well-develop…
American Radio Relay League | Ham Radio Association and Resources
Electro Magnetic Interference EMI10 Part-9
Video Rating: 0 / 5
Electro Magnetic Interference EMI10 Part-6
As part of the ARRL EXPO — part of the 2012 Dayton Hamvention® — the ARRL is pleased to present a plethora of DX activities. Visitors to the ARRL EXPO will see a lot of activities relating to DX, including DXCC card checking and a chance to drop off QSL cards for the ARRL Outgoing QSL Bureau, as well as representatives from the International Amateur Radio Union (IARU) and IARU Member-Societie…
American Radio Relay League | Ham Radio Association and Resources
Radio Frequency Interference Handbook
Price: [wpramaprice asin=”B001E3OV84″]
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Dayton Ohio 2008 Hamfest
Video Rating: 4 / 5
This is a video of my unboxing, building and installation of my Arrow Dual Band 2 Meter/70cm OSJ 146/440 Antenna. I purchased the antenna at: www.arrowantennas.com
Video Rating: 4 / 5
N7TFP un-boxes the OSJ144/440 Jpole from Arrow Antennas.
By Gary Hoffman, KB0H
Contributing Editor
I cleaned my shack this morning. Okay, that might not even be physically possible, but I certainly made a serious dent in the clutter. I removed everything that was keeping me from opening my file cabinets. I extracted a bunch of junk from behind them and moved them back so that there was more space in the shack. I untangled the mass of cables and wires t…
American Radio Relay League | Ham Radio Association and Resources
This video describes how to use CAMtastic to find PCB net antennas in Altium Designer’s PCB editor.
The ARRL has finalized its planning to bring its large exhibition — ARRL EXPO — to Dayton Hamvention, May 18-20. The ARRL EXPO has been a mainstay at Hamvention since 2005, serving as the centerpiece for most of the League’s activities at the country’s largest Amateur Radio convention. “Our goal is help represent the fullness of the ARRL membership programs and services at the convention,” sa…
American Radio Relay League | Ham Radio Association and Resources
Warning Coordination Meteorologist James Brotherton with the National Weather Service in Hanford, CA speaks about tornadoes in California and the importance of the Skywarn organization. Feb 3, 2011.
By Sterling Coffey, N0SSC
ARRL Youth Editor
n0ssc@arrl.net
Experienced hams knew it all too well. Volunteer Examiners expect it. And for some reason, newly licensed hams fear it. What could it be? As the title suggests, completing your first contact is a daunting — yet exciting — event for many. Why is that? What can we do to get over that lump-in-the-throat feeling known as “mic fright?”
You ma…
American Radio Relay League | Ham Radio Association and Resources
gm380 gm340 mtm700 mth800
Video Rating: 0 / 5
On April 14, a string of tornados swept through the Central US and Great Lakes Region, including an EF2 tornado in Creston, Iowa, causing severe damage to the Greater Regional Medical Center and the Southwestern Community College campus. Prior to the tornado, radio amateurs in Creston reported storm observations directly to the National Weather Service. After the storm forced the evacuation of …
American Radio Relay League | Ham Radio Association and Resources
Homemade setup with Arrow II satellite tracking antenna and tripod with 2 handheld radios.
Video Rating: 4 / 5
Just a quick overview of my 220 beam location and placement for WB2LOO this is how the beam is setup & the heading is approx S-SW
Video Rating: 0 / 5
By Stan Horzepa, WA1LOU
Contributing Editor
This week, Surfin’ loses the DIY blahs after learning about new ham radio modules that require hacking.
Sometimes I feel like a slug. I get enthused about building something new, buy what I need to build it, sometimes start building it, sometimes not. I never finish building it because life gets in the way or because I lose enthusiasm or because I am a …
American Radio Relay League | Ham Radio Association and Resources
Working w/ the 1213 kit to get it to work w/ the Ten-Tec Jupiter
Video Rating: 5 / 5
As promised in the April 19th edition of The ARRL Letter, this week’s bulletin features a report on recent solar activity and solar cycle progression from Carl Luetzelschwab, K9LA.
Both the solar flux and sunspot numbers reached a short term low on April 8-11, but they are now rising again. For the past week — April 12-18 — the average daily sunspot numbers more than doubled, compared to the p…
American Radio Relay League | Ham Radio Association and Resources
Get on the air this weekend and participate in the ARRL January VHF Sweepstakes! www.arrl.org VHFDX SHERLOCK www.vhfdx.info
Video Rating: 4 / 5
A look at my first SKN. I was slow but really enjoyed the experience.
Video Rating: 5 / 5
The ARRL Executive Committee met on Saturday, March 24 in St Louis, Missouri. The minutes from that meeting are now available on the ARRL website.
American Radio Relay League | Ham Radio Association and Resources
Ham Radio ARROW ANTENA Unboxing HRO www.hamradio.com ArrowAntennas.com www.arrowantennas.com
Video Rating: 5 / 5
After a life changing injury aboard the tugboat I captained, I was told I would never be able to return to the job I so loved. I felt like the whole world had just ended. After many months of recovery, I had to say my farewells and deal with the loss of the use of my right arm. I found myself beached for the rest of my life. So after the self pity finally wore off, I started a new adventure, Am…
American Radio Relay League | Ham Radio Association and Resources
It was easy to assemble, the instructions & parts are clear & concise no information is provided for antenna gain
Video Rating: 0 / 5
Thinking about using Amateur Radio and wireless technology in your classroom to help facilitate hands-on learning opportunities? The ARRL’s Education & Technology Program (ETP) offers two programs that can help make this happen, but the deadline to apply is fast approaching: The deadline for the 2012 Teachers Institute on Wireless Technology (TI) is May 15, while the deadline for equipment and …
American Radio Relay League | Ham Radio Association and Resources
Cobraworxshopz contacting the International Space Station’s (ISS, ARISS, RS0ISS-4, RS0ISS-11) Amateur Packet Radio Station, transmitting APRS & BBS AX.25 data on 145.825Mhz.
Robert L. (Bob) Shrader, W6BNB, author of 10 QST articles, died April 11 at age 98. He was a long-time resident of Sebastopol, California. His most recent QST article was “Using Mechanical CW Keys” in the February 2010 issue. A prolific author at an age when most settle into retirement, he also published articles in Ham Radio and CQ. He was inducted into the CQ Amateur Radio Hall of Fame in 200…
American Radio Relay League | Ham Radio Association and Resources
Session 4, Hot Chips 23 (2011), Thursday, August 18, 2011. The XMOS Arch and the XS1 Chips David May, XMOS The Worlds’ Fastest DSP Core: Breaking the 100 GMAC/s barrier Chris Rowen, Tensilica
Acting on a recommendation by ARRL Membership and Volunteer Programs Manager Dave Patton, NN1N, the ARRL’s Programs and Services Committee (PSC) adopted new rules for ARRL field card checkers. ARRL card checkers now may check QSL cards for those entities deleted from the DXCC list and, with certain exceptions, check cards for 160 meters. In addition, the PSC decided not to change the process by…
American Radio Relay League | Ham Radio Association and Resources
Portable APRS TX
Image by 3D King
The Micro Trak transmitter, this is the 8 Watt version, it has a version 3 tiny trak from Byonics on board making life so much easier. One day I will post the tracking box and radios I used to use…..
APhA Announces 2012 Postgraduate Best Paper Awards
WASHINGTON, DC – The American Pharmacists Association – Academy of Pharmaceutical Research and Science (APhA-APRS) today announced the recipients of the 2012 APhA Postgraduate Best Paper Awards. The recipients were chosen during the 2012 APhA Annual …
Read more on American Pharmacists Association, pharmacist.com
UConn ban prompts congressional response
Athletic director Warde Manuel said the men's basketball team had a perfect APR score last semester. Manuel said UConn supports tougher academic standards, but does not support applying them retroactively to scores that had been recorded before the …
Read more on Washington Times
As part of ITU Telecom World 2012 — scheduled for October 14-18 in Dubai — the conference will present the Young Innovators Program. With its theme of Youth Innovation for Development, the Young Innovators Competition is a chance for the next generation of young visionaries to demonstrate their ideas and innovations on this global stage and show how their fresh digital thinking can change the…
American Radio Relay League | Ham Radio Association and Resources
Use websdr.org to recieve PSK31 with digipan. Make sure the waterfall drive on digipan is set for stereo mix.
Video Rating: 5 / 5
A short PSK31 QSO demo using MIxW.
Video Rating: 4 / 5
Don Arnold W6GPS talks to Leo W6TWT (twit.tv guy) and Gordon West WB6NOA on Han Nation podcast. This was a condensed video taken from Ham Nation aired August 30, 2011. Leo just has gotten his ham radio license and is very excited about being part of the ham family. Ham Nation is a weekly podcast on Tuesdays 9pm EST on www.twit.tv podcast can be downloaded video courtesy of Ham Nation and www.twit.tv
Video Rating: 5 / 5
Super 8 mm scanned with the Müller HM73 Photo Framescanner an restored with DSP (Digital Signal Processor by HomeDVD.nl
Some problems are challenging to solve using traditional DSP techniques, but FPGAs can often provide an easier and more efficient solution. Examples of applications best suited to FPGA implementation range from simple digital filters through digital radio receivers to high performance video and imaging systems. Of course, there are many other advantages and disadvantages to the FPGA platform, but in many cases the net result is reduced development time, cost, and time-to-market.
Camb-Hams 2012 DXpedition to Mull
There will also be a 24 hour activation from Lunga, IOTA EU-108 using the callsign GS6PYE/P. This will most likely take place at the start of the DX'Pedition from Sunday 29th until Monday 30th April – weather dependent. Martin Lynch and Sons have …
Read more on Southgate Amateur Radio Club
By H. Ward Silver, N0AX
n0ax@arrl.net
Spring marks the transition of the contest seasons, as the big DX contests give way to summer’s domestic and VHF+ activity. See if you’re ready to put some QSOs in your log with radiosport recreation in these April, May, and June on-the-air events! To help you complete the quiz, you can find contest calendars on the ARRL website and the WA7BNM Contest Calenda…
American Radio Relay League | Ham Radio Association and Resources
VX7-R not long since arrived at my QTH and I’ve been very impressed so far. 6/2/70 transmit and wideband receive. 73s Jon
Video Rating: 5 / 5
K2FR Doing a video on programing your Yaesu VX-8R with the software and cable.
Video Rating: 4 / 5
The beginning of a series of ham radio shack video tours, on this first tour, I pay a visit to Matt Arthur, KA0PQW. More shack tours will be added in the future as time allows.
Video Rating: 5 / 5
Finally got my power supply installed and fixed up all the wiring. Finished painting the walls last week, and just finished setting up my desk today. So, everything is set! Come take a look in!
Video Rating: 5 / 5
Using 2 motors for elevation and azimuth and parallax basic stamp BS1. Anyone out there write basic for me for AO 51 tracking? More pic’s at geocities.com
Video Rating: 5 / 5
Reception of the ITUpSAT1 cubesat beacon using the Funcube Dongle receiver and an Arrow II hand-held satellite antenna. Quisk software defined radio receiver running on Ubuntu Linux 10.10 64bit. ITUpSAT1 is transmitting with 100 mW FM CW. The Funcube Dongle is a USB stick SDR receiver for 64 MHz – 1.7 GHz by Howard Long G6LVB, see www.funcubedongle.com Video recorded by Alexandru Csete OZ9AEC www.oz9aec.net
Clip 3/7 Speaker: Malaysian Amateur Radio Emergency Service MARES 1. Introduction to Amateur Radio, History of Ham Radio in Malaysia 2. APRS Introduction 3. Communication with ISS, the amateur radio way 4. Emergency Communication For more information go to: bit.ly
Video Rating: 5 / 5
The Federal Aviation Administration (FAA) is deploying a new generation of Common Air Route Surveillance Radar (CARSR) that has some implications for the use of the 1240-1300 MHz (23 cm) band by amateurs. The Amateur Service allocation in this band is on a secondary basis, with aeronautical radionavigation and several other services primary in the United States Table of Frequency Allocations. T…
American Radio Relay League | Ham Radio Association and Resources
This video is slightly under two minutes and demonstrates how a contact is completed on the HF band during a radio contest. This video was shot during the 2002 Field Day event sponsored by the American Radio Relay League (ARRL). There were two clubs that were involved with this Field Day: the Central Ohio Amateur Radio Emergency Service (COARES), and the Voice of Aladdin Radio Club. The callsign used was W8FEZ.
This video will show you how to connect DV-Dongle and install the software, check your sound.
Video Rating: 5 / 5
On April 3, 2012, perfect conditions conducive to tornado activity converged on North Texas. A slow moving front, combined with abnormally warm temperatures and moist air coming in from the south, produced large hail, numerous funnel clouds, and tornados. As the weather worsened, hams in North Texas activated ARES® and RACES nets. Spotters reported their observations to their local Emergency Op…
American Radio Relay League | Ham Radio Association and Resources
Video Rating: 5 / 5
ARRL Reports 2012 Growth Of 30% in Amateur Radio Licensing
The first quarter of 2012 (January-March) saw a high level of Amateur Radio license exam sessions, producing an elevated influx of applications for new licensees. According to ARRL VEC Manager Maria Somma, AB1FM, these numbers outpaced the 2011 first quarter results by 30 percent. This uptick does not only apply to new applications; there was a 6 percent increase in the number of upgrades, too. “Statistics over the last 13 years reveal that these are the highest numbers that we’ve ever seen for the total number of US amateurs,” Somma said. “Now there are more than 704,000 radio amateurs in the US.”
Amateur Radio Breaks 700,000 Barrier
Somma said that there are currently 704,236 licensed Amateur Radio operators in the US. “We broke the 700,000 barrier in October 2011 for Amateur Radio,” she explained, “and the numbers continue to progress higher. Broken down by license class, at the end of March there were 14,352 Novices, 343,597 Technicians, 161,220 Generals, 57,393 Advanced and 127,674 Amateur Extra licensees. It’s an all-time high for Technician, General and Extra class licensees, as well. Additionally, our total number of licensees across all three classes has grown each year.”
For the first quarter of 2012, Somma said that the ARRL VEC test session statistics are the highest first quarter results since the FCC’s restructuring of the license requirements in 2007: “Our exam session activity and exam elements administered are elevated. As the total number of licensees across all three license classes continues to grow each year, the demand for Amateur Radio exam sessions also grows. In turn, the number of amateurs who want to be Volunteer Examiners and who want to teach Amateur Radio classes is also rising. The ARRL VEC has seen a spike in the number of applications from General and Extra class radio amateurs who want to give back to their community by serving as examiners and instructors. This is a positive trend in Amateur Radio that we expect will continue over the coming months.”