Bob Bruninga, WB4APR, led a group of radio amateurs earlier this month to Mammoth Cave — the world’s longest known cave system — at Mammoth Cave National Park in Kentucky to test how the Automatic Packet Reporting System (APRS) can be used as a means to extend radio communications underground. “When used underground, VHF and UHF radios can only work within a few hundred feet of each other and…
American Radio Relay League | Ham Radio Association and Resources
Tutorial sulle trasmissioni digitali (parte prima)
Open Ukraine RTTY Championship Contest.
Video Rating: 0 / 5
After spending 143 days in space, Expedition 34 Commander Kevin Ford, KF5GPP, Russian Soyuz Commander Oleg Novitskiy and Russian Flight Engineer Evgeny Tarelkin (both of the Russian Federal Space Agency) will begin their voyage home to Earth on Thursday, March 14, marking the end of Expedition 34 on board the International Space Station (ISS). The trio will undock their Soyuz spacecraft at 8:30…
American Radio Relay League | Ham Radio Association and Resources
RV3DHC/P Part No.2/3 – DX-Pedition to RDA MO-81 – 12.06.2010-14.06.2010. QTH: village Babenki nr Troitsk (10km to south)
Video Rating: 0 / 5
Club President “MrDx” vk2ir working some friends from Greece sv8 & sv1 plus EU pile ups on 20mtrs . www.haraoa.com
In addition to an increase in postal rates in January 2013, the US Postal Service introduced a new Global Forever First-Class Mail International stamp. Priced at $ 1.10 each and offered in a pane of 20, the new stamp offers a single price for any First-Class Mail International 1-ounce letter to any country in the world, as well as 2-ounce letters to Canada. The stamp is available online, at post…
American Radio Relay League | Ham Radio Association and Resources
2 meter sideband contacts made during a awesome sporadic E opening from South Dakota. Running 50 watts and a vertical omni-directional antenna which is the wrong way from what most 2m SSB guys run.
After more than 20,000 ARRL members had their arrl.net and arrl.org e-mails blocked by Microsoft, the issue has been resolved. According to ARRL Information Technology Manager Michael Keane, K1MK, Microsoft told the ARRL that the mail blockage from ARRL servers to Microsoft domains (including msn.com, hotmail.com, live.com and outlook.com) was mitigated as of Sunday, March 10. Microsoft caution…
American Radio Relay League | Ham Radio Association and Resources
This is a review of the Current and most used Digital modes in ham and SWL radio and the free software and simple setup to get you on them
Video Rating: 0 / 5
Dallas Standing Wave Construction December 2010.
Video Rating: 0 / 5
Standing Wave Ratio explainedby Pulsecommunications17395 views; Standing Wave Pattern AnimationSWR 016. Watch Later Standing Wave Pattern AnimationSWRby meyavuz11963 views; Making standing waves 443. Watch Later Making standing wavesby froudedude214066 views; Standing Waves Part I Demonstration 438. Watch Later Standing Waves Part I Demonstrationby James Dann25325 views; Scary Massive waves on huge road bridge send Volgograd drivers asphalt surfing 047 …
Video Rating: 0 / 5
147 QSL CARD Over 125 DXCC country
EA5URB/P EB5GG
Video Rating: 4 / 5
Ham Shack
How to build and tune a 40 meter Inverted V wire dipole HF antenna.
Video Rating: 4 / 5
Price: [wpramaprice asin=”B0028PQNRY”]
[wpramareviews asin=”B0028PQNRY”]
More ATAS-120 Products
X200-V USB ADAPTER.. – DSP and echo cancellation functionality eliminates VoIP latency and background noise – Designed specifically for VoIP, speech recognition and softphone applications where voice quality is of the utmost importance – 1-touch answer/end call features improve user productivity (dependent on softphone applications) – For use with professional-grade headsets (sold separately) – In-line volume and mute controls for quick and easy call adjustments – Wideband audio for rich, natura
List Price: $ 92.25
Price: [wpramaprice asin=”B00BGMQD8Y”]
[wpramareviews asin=”B00BGMQD8Y”]
Broadband RFI source between 20 and 28 MHz local to neighborhood. Discussions on the RFI list seemed to indicate this may one of those backyard video bulbs that sends the signal back to the receiver via the house wiring. Notice how the signal is _not_ in synchronism the same way NTSC video is _not_ in synch with 60 Hz line voltage. Both scope and Spectrum Analyzer are set to trigger from 60Hz line source.
Video Rating: 0 / 5
Both the averages of daily sunspot numbers and solar flux rose, with the sunspot numbers up nearly 36 points to 93.3, and the solar flux up nearly 12 points to 112.6. The most active geomagnetic day was Friday, March 1, when the planetary A index was 27 and the mid-latitude A index was 23; Alaska’s high latitude College A index was a whopping 64.
Sunspot numbers for February 28-March 6 were 63, …
American Radio Relay League | Ham Radio Association and Resources
The Gerbil enjoys chewing the uncollected QSL’s he can do 25 a day. This recycles them into bedding it would be better if they were collected though! G4OWT
Video Rating: 4 / 5
This is a multi-communications amateur ham radio antenna. This amateur ham radio antenna deployment system was created by Gary Stapleford an amateur ham radio user. My amateur ham radio call sign is N1PB0.
Video Rating: 3 / 5
The ARRL IT staff has been notified that Microsoft is blocking e-mail to the more than 20,000 members who use the arrl.net e-mail forwarding service to forward e-mail to Microsoft domains (hotmail.com, msn.com, live.com and outlook.com). In addition, the blockage is also affecting those members of the ARRL’s Field Organization and other ARRL volunteers who use an arrl.org alias e-mail address t…
American Radio Relay League | Ham Radio Association and Resources
Here’s a video I took at the Joplin Hamfest. Typical hamfest activity with a little fun.
Video Rating: 5 / 5
The first video of the 2011 National Hamfest organised by the Lincoln Short Wave Club in association with the RSGB at the Newark Showground. This video shows the outside car boot area and the bring and buy tent. See my other two video’s showing the main hall. Thanks to the organisers for arranging it again. Please also see my other radio rally and G8T video’s, de g4shf.
Video Rating: 0 / 5
Part 1of 2 I took this video showing the antenna in action and how directional it is. (Which is what you need to concentrate the radios power in one direction). In the video it shows me in my back yard transmitting 5w (146.835mhz) to a repeater that is located about 40 miles away at 6300′ elevation. I am located at about 1400′ elevation and there are hills directly between the repeater and me, so with a rubber duck I would not have been able to make contact. Buy one of these awesome super-portable light weight antennas for only .95 on eBay! Check out the link below (to eBay) for further info. cgi.ebay.com
Well time to sell it!!! Like my facebook page: www.facebook.com
Video Rating: 3 / 5
After a day of exploring the Green Swamp Wildlife Management Area — which covers 50,692 protected acres in Florida’s Lake, Polk and Sumter Counties — with his grandson, Joe Cody, KE4WDP, of Winter Haven, Florida, saw that the roads were flooding and becoming hazardous. As he tried to drive out of the area, Cody’s small pick-up truck got bogged down in the mud. Since he was out of cell phone r…
American Radio Relay League | Ham Radio Association and Resources
Incredible
Four new poll questions have just been published on the QuickStats page on the ARRL website. Let your voice be heard!
Questions in this month’s QuickStats poll:
American Radio Relay League | Ham Radio Association and Resources
Here is an (obviously) unrehearsed excursion into 10 meter QRP. With about average solar conditions (WWV#’s=104/3/1), I turned the power down to 4 watts on my Elecraft K2 (to tribander @ 36ft), flipped on my web cam and commenced to do a bit of search and pounce during the ARRL 10 meter contest. Starting at the bottom of the band and tuning my way to 28.023, I worked 9 stations in N and S America in about 10 minutes.* NOTE*: As Jorge’s comment points out: I mistakenly gave CW5W’s call as “CW4W” – one of several errors in my video narrations – ’tis one of the drawbacks of posting unedited clips.. I have some nice keying fumbles as well, “WYSIWYG”.
Receiving US stations on a Yaesu FT-990 and trapped dipole for 40-80-160m only 6m over ground.
Video Rating: 0 / 5
Hubo 5 allanamientos en tres barrios con 11 personas detenidas
… dos de ellos menores, y fueron secuestrados equipo de comunicaciones de radiofrecuencia como los utilizados por la Policía de Santa Fe, marca Vertex y dos pulsadores marca Yaesu, además de motopartes correspondientes a diferentes motovehículos.
Read more on Agencia Fe
Los bomberos de Ceibas recibieron equipos de comunicaciones
11/02/13 |El Cuartel Central de Bomberos Voluntarios de Ceibas, Regional IIIª FEABV, ha adquirido 11 equipos de mano (handies), marca Yaesu FT 270R/E, como parte del plan de reequipamiento del personal de la Institució. La adquisición se hizo …
Read more on Diario El Argentino
Демонстрация работы встроенного GPS приёмника в трансивере KENWOOD TH-D72
Video Rating: 0 / 5
RTL-SDR + SDR# in direct sampling mode and MixW32 decoding RTTY on 147 kHz. No downconverter plugged in. Wire is directly soldered to pin 1 of RTL2832.
Video Rating: 0 / 5
1st attempt with signal present fails- Indicator in lower left shows “LISTEN CHANNEL”, then immediately fails with “STOPPING” due to busy channel detection. Cut back on RF gain so no signal is present. Transmits after “LISTEN CHANNEL” with “CALLING” indicator Third attempt with signal again fails immediately after LISTEN CHANNEL
By Stan Horzepa, WA1LOU
Contributing Editor
This week, Surfin’ chases meteors at the Radio Meteor Observation Bulletin website.
Mike Schaffer, KA3JAW — this week’s guest surfer — wrote the about following meteors.
Several thousand meteors enter Earth’s atmosphere each day. The vast majority of these occur over oceans and uninhabited regions, and many are masked by the sunlight. Those that occur a…
American Radio Relay League | Ham Radio Association and Resources
North Kansas City Hamfest
Image by N0SSC
First of two hamfests in two weeks, this one was a blast. Didn’t walk away with anything other than some N connectors and a bunch of pictures.
The winners of the February QST Cover Plaque award are John White, VA7JW, and Ken Tapping for their article “The Penticton Solar Flux Receiver.” Congratulations John and Ken! The QST Cover Plaque Award — given to the author or authors of the best article in each issue — is determined by a vote of ARRL members on the QST Cover Plaque Poll web page. Cast a ballot for your favorite article in th…
American Radio Relay League | Ham Radio Association and Resources
Signal of KP4AO from Arecibo (Portorico) reflected by the Moon on April, 18 2010 and received in North-East Italy. Our equipment was: Yaesu FT-817 and 10 elements Yagi. KP4AO equipment was about 400 Watts output and the famous 305 mt dish antenna of the Arecibo observatory. Mode: digital JT65.
Video Rating: 5 / 5
Compiled by S. Khrystyne Keane, K1SFA
ARRL News Editor
news@arrl.org
This feature — including convenient web links to useful information — is a concise monthly update of some of the things the ARRL is doing on behalf of its members. This installment covers the month of February.
Packets for the 2013 ARRL Field Day are now available.
The International Telecommunication Union is offering a free dow…
American Radio Relay League | Ham Radio Association and Resources
This video is about High Frequency (HF) antenna tuners.
Video Rating: 5 / 5
This past week, there was a decline in the solar and geomagnetic indices: The average daily sunspot number dropped nearly 21 points to 57.7, while the average daily solar flux softened by 4.7 points to 100.9 and the average daily planetary A index declined 6.4 points to 5.1. This isn’t much of a change, but geomagnetic activity was low already, and this is even lower.
Sunspot numbers for Februar…
American Radio Relay League | Ham Radio Association and Resources
Price: [wpramaprice asin=”B00A0ZZFAA”]
[wpramareviews asin=”B00A0ZZFAA”]
Find More Radio Frequency Interference Products
This is my yaesu FT-1000D, the antenna is an Optibeam OB12-4W. Thanks for looking.
AMATEUR RADIO YAESU FT-901DM TRANSCEIVER NICE OLD RADIO LONDON,ONTARIO NOV.2009.
Video Rating: 4 / 5
