Pages Of Interest
- 403 CHEAP DIY Homebrew Wire Antennas for Ham Radio
- Amateur Radio Parity Act – Watch Video And Help Get This Law Passed!
- Attic AMSAT Antenna – Working the Ham Radio Satellites With A Rotatable Computer Controlled Yagi Attic Antenna
- Cheap Computer Controlled TV Rotor for AMSAT Satellites
- CrimperGate – When the Coax Crimper Jaws Won’t Crimp Close – A Mystery
- First Portable Solar Setup For Ham Radio – Bioenno Solar Charge Controller SC-4830JUD and ALLPOWERS 100W Solar Charger AP-SP-012-BLA Portable Solar Panel Kit
- For Sale: NOOELEC RTL-SDR with NOOELEC Ham It Up V1.3 – Includes Metal Enclosure And SDR Connector Cable For SDR.
- Ham Radio Deluxe – Last Free Version Available for Download Here
- Ham Radio RFI – How To Track Down and Find RFI and Noise Affecting Your Ham Station
- Ham Radio Satellite Antenna Dilemma – In Search Of A Solution
- Ham Radio Shack For Sale – Two Yaesu FT-991 / Yaesu ATAS-120a / Heil Pro 7 Headset / LDG Z11 Pro Tuner / Yaesu FH2 – Hamvention Sale!
- Ham Radio Station – Kilo Three Triple R – The K3RRR Anomaly
- K3RRR Tweets – Follow Me At @K3TripleR
- MARC Club Station
- MFJ-1786 Loop Antenna – My Stealth Antenna Installations
- Privacy Policy
- QSL Cards Received
- SDR – Get Maximum Decodes When Your Levels Are Right – Software Defined Radios for Digital Communications
- Signalink and Other USB Digital Interfaces Huge Bug Fix for Amateur Radio Digital Modes
- Technoweenie’s JT-65 HF Presentation – JT65 HF HB9HQX And JT Alerts – Video and PowerPoint
- Terms Of Service
- Update: SignaLink and Other USB Digital Interfaces – Huge Bug + Permanent Fix for Amateur Radio Digital Modes
- Winlink – HF and VHF Radio Email For Emergencies and SHTF
- Wire Antennas – 287 Different Wire Antennas To Choose From
- K3RRR Yaesu ATAS 120a Antenna Mobile / Portable and Fixed Station
- El Cheapo AZ EL Satellite Antenna
- QTH of K3RRR – Potomac Maryland and Washington DC Area
- Fifteen Milliseconds Of Techno-Weenie Fame
- Personal Profile
- QRZ – Contact K3RRR
Recent Posts
- Ham Radio QRN: Have S7 to S9 Noise Problem on HF? Here’s My Solution
- Ham Radio QRN: “The End of Daytime HF?” AMSAT BBS Posting By Robert Bruninga WB4APR
- 20151115_site_visit-8907
- Latest RTTY News
- Latest Amateur Radio News
- Nice Amateur Radio photos
- Nice APRS photos
- Cool Ham Radio images
- Nice Amateur Radio photos
- 671B3621: Sim/KD4REE
- K7FE
- Nice Amateur Radio photos
- Willemstad-6615
- Nice ARRL photos
- Cool Ham Radio images
Pages
- 403 CHEAP DIY Homebrew Wire Antennas for Ham Radio
- Amateur Radio Parity Act – Watch Video And Help Get This Law Passed!
- Attic AMSAT Antenna – Working the Ham Radio Satellites With A Rotatable Computer Controlled Yagi Attic Antenna
- Cheap Computer Controlled TV Rotor for AMSAT Satellites
- CrimperGate – When the Coax Crimper Jaws Won’t Crimp Close – A Mystery
- First Portable Solar Setup For Ham Radio – Bioenno Solar Charge Controller SC-4830JUD and ALLPOWERS 100W Solar Charger AP-SP-012-BLA Portable Solar Panel Kit
- For Sale: NOOELEC RTL-SDR with NOOELEC Ham It Up V1.3 – Includes Metal Enclosure And SDR Connector Cable For SDR.
- Ham Radio Deluxe – Last Free Version Available for Download Here
- Ham Radio RFI – How To Track Down and Find RFI and Noise Affecting Your Ham Station
- Ham Radio Satellite Antenna Dilemma – In Search Of A Solution
- Ham Radio Shack For Sale – Two Yaesu FT-991 / Yaesu ATAS-120a / Heil Pro 7 Headset / LDG Z11 Pro Tuner / Yaesu FH2 – Hamvention Sale!
- Ham Radio Station – Kilo Three Triple R – The K3RRR Anomaly
- K3RRR Tweets – Follow Me At @K3TripleR
- MARC Club Station
- MFJ-1786 Loop Antenna – My Stealth Antenna Installations
- Privacy Policy
- QSL Cards Received
- SDR – Get Maximum Decodes When Your Levels Are Right – Software Defined Radios for Digital Communications
- Signalink and Other USB Digital Interfaces Huge Bug Fix for Amateur Radio Digital Modes
- Technoweenie’s JT-65 HF Presentation – JT65 HF HB9HQX And JT Alerts – Video and PowerPoint
- Terms Of Service
- Update: SignaLink and Other USB Digital Interfaces – Huge Bug + Permanent Fix for Amateur Radio Digital Modes
- Winlink – HF and VHF Radio Email For Emergencies and SHTF
- Wire Antennas – 287 Different Wire Antennas To Choose From
- K3RRR Yaesu ATAS 120a Antenna Mobile / Portable and Fixed Station
- El Cheapo AZ EL Satellite Antenna
- QTH of K3RRR – Potomac Maryland and Washington DC Area
- Fifteen Milliseconds Of Techno-Weenie Fame
- Personal Profile
- QRZ – Contact K3RRR
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Video 7.wmv
It was relatively quiet last night to the wee hours of the morning (0300 Eastern) with a few bursts like the pulsing just couldn’t quite get started. Today 12 noon Eastern “It’s back!!!!” and this time I’m getting a recording of the pulsing nature of this RFI – Radio Frequency Interference.
Video Rating: 0 / 5
Nice Single Side Band photos
A few nice Single Side Band images I found:
Latest Ham Radio News
Help promote amateur radio around the world
You are invited to help spread the word about this wonderful hobby amateur radio to a global radio audience! You are invited to call into a live radio show tomorrow Saturday November 12, 2011 between 4 PM Central and 10 PM Central. …
Read more on Southgate Amateur Radio Club
Ham Radio in James May TV show
The BBC TV show 'Man Lab' featured an item on High Altitude Balloons with shots of some of the Amateur Radio equipment used. The balloon item starts 1:06 into the show. At 09:55 James May dives into a pursuit vehicle equipped with two Amateur Radio …
Read more on Southgate Amateur Radio Club
Experiences of a young radio amateur during HST
I have just finished writing an article about HST in our national amateur radio journal Radioamatööri. I hope that this sector of Amateur Radio will become more popular in Finland and of course everywhere in the world. Next time there will be more …
Read more on Southgate Amateur Radio Club
Attempt at a loading coil at the bottom of the mast
A few nice Antenna tuner images I found:
Attempt at a loading coil at the bottom of the mast
Image by Richard Corfield (M0RJC)
Adding inductance lowers the resonant frequency of the antenna – great! It also increases the Q or sharpness, so reducing the frequency range it can be tuned over – not so great. This worked quite well on 6m, but I had better luck on HF without the coil.
Kenwood TS-430 Amateur Radio Setup
Image by mrbill
Kenwood TS-430S amateur radio transceiver along with the AT-250 automatic antenna tuner (on the left) and PS-430 power supply (on the right). This equipment dates from the early to mid 1980s.
I got it for cost-of-shipping from a friend; having a minor problem fixed and a full tuneup done will cost me around 0 but I’m still out out less money than if I’d bought a new radio.
KEMET Offers HiQ-CBR Series Surface Mount Multilayer Ceramic Capacitors for …
KEMET Offers HiQ-CBR Series Surface Mount Multilayer Ceramic Capacitors for …
Typical applications include critical timing, tuning, bypass, coupling, feedback, filtering, impedance matching, and DC blocking. Field applications include wireless and cellular base stations, wireless LAN, subscriber-based wireless services, …
Read more on Sacramento Bee
Myryad MT 100 FM stereo tuner
This is followed by a discrete class-A push-pull output buffer amplifier, which provides low output impedance and high drive capability. The MT 100 has eight separate power supplies. The signal-strength meter combines the signal-strength output from …
Read more on Stereophile Magazine
U.S. Patents Awarded to Inventors in Oregon (Nov. 11)
11 — Electro Scientific Industries, Portland, Ore., has been assigned a patent (8054085) developed by Brian Johansen, Hillsboro, Ore., and Brandon John McCurry, Portland, Ore., for a "programmable gain trans-impedance amplifier overload recovery …
Read more on Targeted News Service (subscription)
RTTY – Weather forecast on shortwave
Radio: Icom R8500 Antenna: Diamond WD-330S Software: TrueTTY
Video Rating: 4 / 5
What Is Amateur Radio (Ham Radio)
A not so short video on what amateur radio (aka ham radio) is all about. I tell you how to get started in the hobby and show you around my ham shack. If you have questions about ham radio feel free to ask. If I get enough questions I may do a follow up video. Sites worth checking out: www.arrl.org www.arrl.org www.arrl.org Places to study to become a ham: www.qrz.com www.hamradiolicenseexam.com Ham radio Youtube channels: www.youtube.com www.youtube.com www.youtube.com www.youtube.com www.youtube.com www.youtube.com www.youtube.com Thanks for taking the time to watch. 73s Jay
Sony ICF-SW7600GR AM/FM Shortwave World Band Receiver with Single Side Band Reception
Sony ICF-SW7600GR AM/FM Shortwave World Band Receiver with Single Side Band Reception
AM (LW/MW/SW) & FM stereo reception / 10-key direct access tuning / World time clock with dual alarm / 100 station memory presets
List Price: $ 199.99
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Nice Ham Radio photos
Check out these Ham Radio images:
NYC Marathon 09 – Ham Radio Volunteer Group
Image by Whiskeygonebad
NYC Marathon 09 – Ham Radio Volunteer Group alongside the Amateur Radio precursor vehicle @ Mile 11. L to R: Anthony WW2W, Phyllis KC2DKD, Robert KB2PSM [holding Noah with Julianne front], Frank WB2BXO, Howard N2GOT & Communication Volunteers. Logistic, emergency Support.
The L-network 238B antenna tuner – Part 1
The L-network 238B antenna tuner, vs. T or Pi network tuners
Video Rating: 4 / 5
This is a big random wire antenna tuner for amateur radio.
Video Rating: 5 / 5
Cool ARRL images
Check out these ARRL images:
Split Rock ARA Field Day 2007
Image by bigtowers20
Split Rock Amateur Radio Association ARRL Field Day 2007
Horseshoe Lake, Roxbury Township, NJ
Split Rock ARA Field Day 2007
Image by bigtowers20
Split Rock Amateur Radio Association ARRL Field Day 2007
Horseshoe Lake, Roxbury Township, NJ
ARRL’s Extra Q&A
ARRL’s Extra Q&A
Upgrade to an Extra Class Ham Radio License NOW! It’s Quick and Easy with this study guide and the convenient question and answer format.
ARRL’s Extra Q & A is your authoritative guide to every question in the Extra question pool–everything you need to pass the top-level Amateur Radio license exam! With more than 700 questions included in the question pool, using ARRL’s Extra Q & A is the best way to review for the exam with confidence.
Upgrade to an Extra Class Ham Radio Lic
List Price: $ 9.99
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Related ARRL Products
T100 Vector Impedance Analyzer – Phase Plot
Using the phase plot feature of T100 Vector Impedance Analyzer to find out the resonance frequency of an antenna.
Video Rating: 0 / 5
Plotting the impedance (Z) of an antenna from 100MHz to 170MHz with T100 Vector Impedance Analyzer.
Nice Amateur Radio Emergency Service photos
Some cool Amateur Radio Emergency Service images:
DSC04113
Image by Kyle Fox
The 6 meter radio, not used.
VE7RVA repeater site on Sumas Mountain near Abbotsford, British Columbia. This repeater is maintained by Fraser Valley Amateur Radio Emergency Service Society.
VHF 146.610 + Tone 110.9 (IRLP Node 1461)
UHF 442.025 + Tone 110.9
DSC04099
Image by Kyle Fox
Another shot of Loial on the tower.
VE7RVA repeater site on Sumas Mountain near Abbotsford, British Columbia. This repeater is maintained by Fraser Valley Amateur Radio Emergency Service Society.
VHF 146.610 + Tone 110.9 (IRLP Node 1461)
UHF 442.025 + Tone 110.9
DSC04089
Image by Kyle Fox
Tuned cavity duplexer for the 440 repeater.
VE7RVA repeater site on Sumas Mountain near Abbotsford, British Columbia. This repeater is maintained by Fraser Valley Amateur Radio Emergency Service Society.
VHF 146.610 + Tone 110.9 (IRLP Node 1461)
UHF 442.025 + Tone 110.9
Back view of the dish
Some cool AMSAT images:
Back view of the dish
Image by csete
OZ2ABA working on the dish
Image by csete
OZ2ABA working on the dish
Image by csete
Bandspeed Video Demo of Interference Avoidance.wmv
Wi-Fi access point with an Embedded AirMaestro RF Signal Analyzer from Bandspeed automatically changes channels to avoid RF interference to resume video transmission. Advanced RF spectrum displays with WLAN channel quality information and interference classification provides visibility into the RF environment.
Video Rating: 0 / 5
Kokomo – Single Side Band Radio
Video Rating: 0 / 5
Cross Band repeater z TM-D710
Jak przełączyć Kenwooda TM-D710 w tryb cross band repeater.
18:40-18:50 approx English Time 437.800MHz and 145.800MHz Using Yaesu FT8800E & Diamond X300 collinear.
Video Rating: 4 / 5
Latest ARRL News
Plano Amateur Radio Klub honored
For more information contact Ted Gurley (KD5VFB), VP for PR with PARK, kd5vfb@arrl.org or Jo Via, Executive Director of the Plano Balloon Festival, jovia@planoballoonfest.org. PARK is a non-profit 501c3 organization. The organization supports public …
Read more on Southgate Amateur Radio Club
BRIEFLY: Oct. 21
Purchase the book, Technician Questions and Answers 5th edition publication #0847 by ordering online at arrl.org click on arrlstore or call 860-594-0200. Book is $ 17.95 plus handling and shipping. Exam fee is $ 15 to be paid on day of exam. …
Read more on Wicked Local
AMSAT to celebrate 50 years in space at symposium
ARRL Laboratory Test Engineer Bob Allison, WB1GCM, will also be speaking at the Symposium, accompanied by a refurbished prototype of OSCAR 1. With help from Ginner and other AMSAT members, Allison and W1AW Station Manager Joe Carcia, NJ1Q, …
Read more on Southgate Amateur Radio Club
Part 2: DAIWA CNW 518 Antenna Tuner Tuning Procedure
The DAIWA Model CNW-518 is rated @ 2.5 kW RF PEP output for the Ham Bands of 3.5 to 30 mHz. This antenna tuner has be modified to include some of the out of band frequency in the upper bands from 20 meters to 10 meters. This mode was probably made for MARS operation. This mode does not include 11 meters. This video clip shows tuning the tuner into a Cushcraft R5 vertical antenna (20 to 10 meters coverage) The RF is being supplied by an Yaesu FT-890 Transceiver.
Video Rating: 5 / 5
Here is a creation built by Dave – VO1TTU nearly 10years ago, and it works just as good today as the day the tuner was built.
Video Rating: 5 / 5
ARRL EME CONTEST FROM JAMESBURG DISH WORKING G4CCH
AD6IW, Goran working G4CCH, Howard on 1296 MHz. by bouncing signals off the moon using the 97 foot Jamesburg Dish in Carmel Valley, California
An apps-free portable TV
An apps-free portable TV
It's a personal digital TV with a 4.3-inch screen, built-in TV tuner, stereo speakers and rechargeable lithium battery. In consumer tests, it received an average of 34.25 channels, and the battery lasted 90 minutes. The little screen's high resolution …
Read more on Chicago Tribune
Mazda 2 GX tuner feels big, but drives small
There's also the extreme rear wing ($ 384.95) which was painted in a contrasting colour, side skirts ($ 475), 16-inch alloy wheels ($ 991.80) and a stub antenna ($ 22.53). Fog lights have also been added ($ 435.87). On the inside, the tuner adds a Pioneer …
Read more on Montreal Gazette
The world's leading magazine and events company for information technology in …
Building on the technology of the previous BB90 version, the MT-BB100 gathers locking information is from an internal tuner, the satellite modem and the AGC (automatic gain control) level. The antenna is constructed of carbon fibre and weighs less than …
Read more on Digital Ship
Paraph of Bone & Other Kinds of Blue (APR Honickman 1st Book Award) Reviews
Paraph of Bone & Other Kinds of Blue (APR Honickman 1st Book Award)
APR First Book Prize winner. Energetic language and mature presence mark this beautiful, disturbing debut.
List Price: $ 23.00
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Fanatic Digital HDMI-to-HDMI Cable Ultra Clarity 6′
HDMI is a data superhighway for digital video and audio. For the best high definition experience, use an HDMI cable that delivers all the picture and sound data your HD components require. . This cable is optimized for the next generation performance of HDTVs and game consoles that will require 1080p resolution with Deep Color technology. . Advanced High Speed HDMI cable with a bandwidth at a maximum of 10.2 Gbps. Specially designed for home theater enthusiasts who also want the best i
List Price: $ 0.01
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Packet Radio, including: Morse Code, Samuel Morse, Q Code, Sos, Cqd, Telegraph Key, Alfred Vail, Z Code, Cq (call), 500 Khz, Signal Lamp, American … Code Abbreviations, Instructograph, Psk31
Packet Radio, including: Morse Code, Samuel Morse, Q Code, Sos, Cqd, Telegraph Key, Alfred Vail, Z Code, Cq (call), 500 Khz, Signal Lamp, American … Code Abbreviations, Instructograph, Psk31
Hephaestus Books represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Hephaestus Books continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human knowledge. This
List Price: $ 30.75
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Quantized Radio Modulation Modes, including: Orthogonal Frequency-division Multiplexing, Radioteletype, Automatic Link Establishment, Direct-sequence … Burst Transmission, Phase-shift Keying, Psk31
Hephaestus Books represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Hephaestus Books continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human knowledge. This
List Price: $ 22.75
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Radio Frequency Interference: How to Find It and Fix It (Radio Amateur’s Library, Publication No. 149.)
Radio Frequency Interference: How to Find It and Fix It (Radio Amateur’s Library, Publication No. 149.)
Great reference book for the amateur radio operator in your life.
List Price: $ 18.00
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Amateur Radio Rig
Check out these Amateur Radio images:
Amateur Radio Rig
Image by Joshua Fuller
Love this shot. It came out well considering the lighting conditions.
About the FT-897:
The FT-897D is a rugged, innovative, multiband, multimode portable transceiver for the amateur radio MF/HF/VHF/UHF bands. Providing coverage of the 160-10 meter bands plus the 6 m, 2 m, and 70 cm bands, the FT-897 includes operation on the SSB, CW, AM, FM, and Digital modes, and it’s capable of 20-Watt portable operation using internal batteries, or up to 100 Watts when using an external 13.8-volt DC power source.
ISO 10534-1:1996, Acoustics – Determination of sound absorption coefficient and impedance in impedance tubes – Part 1: Method using standing wave ratio
ISO 10534-1:1996, Acoustics – Determination of sound absorption coefficient and impedance in impedance tubes – Part 1: Method using standing wave ratio
Specifies a method for the determination of the sound absorption coefficient, reflection factor, surface impedance or admittance of materials and objects. The values are determined by evaluation of the standing wave pattern of a plane wave in a tube, which is generated by the superposition of an incident sinusiodal plane wave with the plane wave reflected from the test object.
List Price: $ 109.00
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Cool Backscatter images
Some cool Backscatter images:
Flashy Rain
Image by Caro’s Lines
Airborne Trans-pacific Sydney to Los Angeles
Image by brewbooks
This is a Glory (optical_phenomenon) which can be seen from aircraft in the direction opposite the sun, which was the case here.
i041607 079
Airborne Trans-pacific Sydney to Los Angeles
Image by brewbooks
This is a Glory (optical_phenomenon) which can be seen from aircraft in the direction opposite the sun, which was the case here.
i041607 083
Cool Amateur Radio Emergency Service images
Some cool Amateur Radio Emergency Service images:
DSC04117
Image by Kyle Fox
Bank of batteries.
VE7RVA repeater site on Sumas Mountain near Abbotsford, British Columbia. This repeater is maintained by Fraser Valley Amateur Radio Emergency Service Society.
VHF 146.610 + Tone 110.9 (IRLP Node 1461)
UHF 442.025 + Tone 110.9
DSC04140
Image by Kyle Fox
View from the tower.
VE7RVA repeater site on Sumas Mountain near Abbotsford, British Columbia. This repeater is maintained by Fraser Valley Amateur Radio Emergency Service Society.
VHF 146.610 + Tone 110.9 (IRLP Node 1461)
UHF 442.025 + Tone 110.9
DSC04144
Image by Kyle Fox
View from the tower.
VE7RVA repeater site on Sumas Mountain near Abbotsford, British Columbia. This repeater is maintained by Fraser Valley Amateur Radio Emergency Service Society.
VHF 146.610 + Tone 110.9 (IRLP Node 1461)
UHF 442.025 + Tone 110.9
Latest Electro-Magnetic Interference News
Lenawee County wind turbine proposal could interfere with airport safety
The turbines would cause electromagnetic interference on the airspace, and would be a hazard to air navigation. The Interstate Informed Citizens Coalition, which has been fighting for tighter restrictions on the turbines, says that this affects 63 of …
Read more on WTOL.com
GTRI opens radar/antenna measurement range
The new facility, which is shielded against electromagnetic interference, will be used for GTRI's defense-related research projects and collaborations with outside organizations. Located in GTRI's midtown Atlanta campus, the facility has a test zone …
Read more on Test & Measurement World
Nice AMSAT photos
Check out these AMSAT images:
Heavy duty antenna rotator
Image by csete
Heavy duty antenna rotator made in DDR.
Heavy duty antenna rotator
Image by csete
Heavy duty antenna rotator made in DDR.
Made in DDR!
Image by csete
Heavy duty antenna rotator made in DDR.
Toledo museum features film, art sale
Toledo museum features film, art sale
6 from 11 am to 4 pm in the Seneca County Opportunity Center, 780 East Co. Rd. 20 south of Tiffin. In addition to Tiffin Glass, dealers will sell fine glassware and collectibles. Admission is $ 3. Tiffin Glass Museum at 25 South Washington St. in …
Read more on Toledo Blade
Entertainment listings
$ 30/$ 16, 604-780-0331, http: //fugue.biz A Broadway playwright, his producer and his actress wife plot to guarantee their new play will succeed by faking his suicide. By John Nassivera, presented by Metro Theatre Company. …
Read more on Vancouver Sun
Collegamento con la stazione spaziale ISS al Curcio di Ispica
Collegamento con la stazione spaziale ISS al Curcio di Ispica
La diretta dell'evento sarà trasmessa in streaming sul canale AMSAT Italia di LiveStream a questo indirizzo a partire dalle ore 11 (ora locale). Alle ore 13,03 gli studenti si metteranno in contatto con gli astronauti ai quali porranno delle domande. …
Read more on Ondaiblea
La Aecid destinará 51 millones a mejoras en agua y saneamiento en América …
Los proyectos en Perú son, uno, de la Asociación de Municipalidades de la Cuenca del Río Santo Tomás-Amsat-Perú (8,7 millones), para ampliación y mejora de servicios de agua, saneamiento, gestión de residuos sólidos y afianzamiento hídrico de cuencas …
Read more on Diario Siglo XXI
The Rtty Listener Issues 1-25
The Rtty Listener Issues 1-25
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THE NEW RTTY
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More RTTY Products
Palstar AT2K Antenna Tuner – Video Review
Video Review of a Palstar AT2K Antenna Tuner Tuner Details: Max Rated Power Handling – 2kW Designed for 160-6m Feature two variable capacitors and a roller inductor Relay controlled inductor for extra inductance on 160m Two coax outputs plus balanced line output and long wire output Various active power meter adjustments Check out the eHam reviews… www.eham.net
Video Rating: 4 / 5
Antenna tuners that were built by Dave – vo1dv
Video Rating: 5 / 5
ARISS ham radio contact planned for children's hospital in Switzerland
ARISS ham radio contact planned for children's hospital in Switzerland
ARISS offers an opportunity for students to experience the excitement of Amateur Radio by talking directly with crewmembers onboard the International Space Station. Teachers, parents and communities see, first hand, how Amateur Radio and crewmembers on …
Read more on Southgate Amateur Radio Club
Showing how to use the Crossband Repeater on the Yaesu Ft 8900R
Showing how to turn down the power on the Ft8900 and Cross band repeat. Warning Do this at your own risk.
Video Rating: 4 / 5
Demostration of the IC-2350H Cross Band Feature.
Preliminary study of a shunt substitution method of measurement of antenna impedances at frequencies from 20 to 400 MC, (Mineola)
Preliminary study of a shunt substitution method of measurement of antenna impedances at frequencies from 20 to 400 MC, (Mineola)
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Amateur Radio Organizations, including: American Radio Relay League, Amateur Radio Emergency Service, Amateur Auxiliary, Field Day (amateur Radio), … National Traffic System, Official Observer Reviews
Amateur Radio Organizations, including: American Radio Relay League, Amateur Radio Emergency Service, Amateur Auxiliary, Field Day (amateur Radio), … National Traffic System, Official Observer
Hephaestus Books represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Hephaestus Books continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human knowledge. This
List Price: $ 28.75
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Dutch Customs deploy Z Backscatter
Dutch Customs deploy Z Backscatter
1 (UPI) — The Netherland's Customs Administration is using Z Backscatter mobile X-ray screening system by American Science and Engineering Inc. to check aircraft cargo. The system will scan in real-time a variety of aircraft to reveal organic threats …
Read more on UPI.com
Did the TSA Ignore Early X-Ray Scanner Cancer Risks?
So how did 250 X-ray "backscatter" scanners, which potentially increase cancer rates, land in American airports? Because the TSA insists they're safe. As it turns out, The Food and Drug Administration is only responsible for regulating medical X-ray …
Read more on Gizmodo
APRS Tracker
Check out these APRS images:
APRS Tracker
Image by mightyohm
Testing the GPS with a MAX232 RS-232 level shifter
Future APRS Igate
Image by VA5LF
This is a stack of an Arduino, the Radio Shield from Argent Data Systems, and an Ethernet shield. I plan to make this setup into a small low power consumption Igate and digipeater for temporary operations.
APRS Tracker
Image by mightyohm
Configuring the GPS
keizer of amsat
my driver sweet lover
Rouend TV 02/20/10 02:35PM – Captured Live on Ustream at www.ustream.tv with the Ustream Mobile App
Backscatter
BACKSCATTER – interactive visuals, music, performance by Wetcircuit (Holly Daggers). Premiered at ReVISION by Forward Motion Theater January 14th, 2011 Backscatter technology is used by the TSA — a division of Homeland Security — to perform random full-body scans of airline passengers. The scanners create “ionizing radiation”, X-rays powerful enough to strip molecules in the body of their electrons. Charged particles launch from the skin back into the scanner, producing a ghostly nude image that is literally created from body matter. Fourth Amendment rights are forfeit when passengers consent to the search.
Video Rating: 5 / 5
Backscatter Removal – Photoshop Magic Tools for the Underwater Photographer
Video Rating: 4 / 5
Split Rock ARA Field Day 2007
Some cool ARRL images:
Split Rock ARA Field Day 2007
Image by bigtowers20
Split Rock Amateur Radio Association ARRL Field Day 2007
Horseshoe Lake, Roxbury Township, NJ
Split Rock ARA Field Day 2007
Image by bigtowers20
Split Rock Amateur Radio Association ARRL Field Day 2007
Horseshoe Lake, Roxbury Township, NJ
Health Professionals Style Manual
Health Professionals Style Manual
“This [book] is a guide to improving writing, with a major focus on demonstrating proper English grammar and composition .This is a must have reference to be kept at the writer’s side.” Score:100, 5 stars –Doody’s
List Price: $ 42.00
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Latest RTTY News
Latest RTTY News
Modem Hamcom
Image by lu6fpj
IOTA News
Activity will be on 160-10 meters using CW, SSB and RTTY. Since their activity will be taking place in the autumn, a special emphasis will be placed on the lower bands. Operations on 160m and 80m will be run on alternate sunrise and sunset. …
Read more on Southgate Amateur Radio Club
Deutscher Wetterdienst auf der HANSEBOOT 2011 in Hamburg
Vorgestellt werden Informationen, die kostenfrei im Internet und als Funkausstrahlungen des DWD-eigenen Senders Pinneberg (NAVTEX, RTTY und Faksimile) verfügbar sind. Besucher des DWD-Stands können sich zudem über IT-gestützte Informationssysteme, …
Read more on Dorfinfo.de
Latest Amateur Radio News
Space station to Overland High: 'I'm ready to talk to the kids'
Kavya Ganuthula, 12, waits in line to ask astronaut Mike Fossom questions via wireless technology during an Amateur Radio on the International Space Station contact event held Oct. 27 at Overland High School in Aurora. Fossom responded to questions …
Read more on The Aurora Sentinel
Mercer County seeks radio operators to assist in emergencies
The Mercer County Emergency Management Agency is recruiting amateur radio operators to become a part of the Mercer County Amateur Radio Response Team, which will lend support to the Tri-County Medical Response Corps. The amateur radio group will assist …
Read more on Quad City Times
Small Antennas:Miniaturization Techniques & Applications
Small Antennas:Miniaturization Techniques & Applications
Next-generation small antenna design techniques This authoritative text provides the most up-to-date methods on the theory and design of small antennas, including an extensive survey of small antenna literature published over the past several years. Written by experts at the forefront of antenna research, Small Antennas: Miniaturization Techniques & Applications begins with a detailed presentation of small antenna theory–narrowband and wideband–and progresses to small antenna design met
List Price: $ 99.95
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Antenna impedance in the ionosphere
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Cool Backscatter images
A few nice Backscatter images I found:
Glory – Darwin to Sydney
Image by brewbooks
this is a Glory (optical_phenomenon) which can be seen from aircraft in the direction opposite the sun, which was the case here.
i090508 031
HF Antenna Tuner for Amateur Radio Tranceivers – 300W 1.8-60Mhz – MFJ-945E
HF Antenna Tuner for Amateur Radio Tranceivers – 300W 1.8-60Mhz – MFJ-945E
HF Radio Antenna Tuner matcher for HF frequencies between 1.8-60Mhz.
* Requires Optional Patch cable with PL-259 connectors for hookup to transceiver.
* Features Cross-needle SWR/Power meter ( 300W & 30W scales), meter illuminates if hooked up to 12Vdc.
* 300W max input. SO-239 input for antenna. With instructions.
List Price: $ 124.95
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Sherwood RX-4109 2 x 100 Watt RMS Stereo Receiver (Black)
The Sherwood RX-4109 receiver is designed and built in-house with the same quality and attention to detail we have been bringing to our audio gear for the last 50 years.
List Price: $ 179.95
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UV-3R Dual-Band Pocket Two Way Radio Walkie Talkie – DealExtreme
More detail information on Pocket Two Way Radio Walkie Talkie: www.dealextreme.com – 1.4″ LCD display – Frequency range: VHF136~174, UHF400~470 MHz – 99 Channels – 5/6.25/12.5/25KHz – Working voltage; 3.7V – Battery: 1500mAh – Frequency Stability: -30 ~ +60 degree Celsius – Antenna impedance: 50 ohm – RF Power Output: 2W – S/N ratio: 45dB/42dB – FM range: 87~108MHz
Testing of a newly-built 160 metre AM transceiver at Chelsea on Port Phillip Bay near Melbourne. The receiver featured in a previous video. The transmitter is similar to the one presented here: www.angelfire.com It is crystal controlled on 1843 kHz. A centre-tapped 15 volt 1A power transformer is used for modulation. Efficiency is quite high – total Tx power consumption is 1A for approx 7 watts out on peaks. The IRF510 final stage does however need to be presented with an acceptable antenna impedance otherwise distortion can appear on the output, as happened here (the switched inductor in series with the antenna has since been replaced). The transmitter’s circuit is described in ‘Lo Key’ September 2011 – published by the CW Operators QRP Club.
Video Rating: 5 / 5
U.S. Patents Awarded to Inventors in Pennsylvania (Oct. 21)
U.S. Patents Awarded to Inventors in Pennsylvania (Oct. 21)
The abstract of the patent published by the US Patent and Trademark Office states: "An electrical switching apparatus comprises: a first terminal; a second terminal; separable contacts electrically connected between the first terminal and the second …
Read more on Targeted News Service (subscription)
U.S. Patents Awarded to Inventors in Maryland (Oct. 29)
The charger controller may set the output current level by adjusting gain of an operational amplifier having a negative feedback configuration with the feedback signal input to a non-inverting input terminal of the operational amplifier, …
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Running Windows on a Mac, part 3: The complete how-to
Open a Terminal window and run "diskutil list". Determine which device node matches your USB thumb drive (eg this could be "/dev/disk4"). 2. Unmount this disk by typing in "diskutil unmountDisk /dev/diskX" (where X stands for the number of your USB …
Read more on PC Advisor
“ZBV” – Z Backscatter Van
This tech has been around for a while, but with DHS making more grants to local police departments in the next 24 months, you need to be aware of this. Uses for this tech allow the police to see what you have. Whether they use it to peek at what you own as a ‘preview’ in preparation for requesting a warrant, assuming they go through those motions, would allow them to add additional details to the warrant… again, assuming that they do that. So many agencies today don’t even bother because the Constitution is being ignored wholesale, especially by federal agencies. Suppose the ATF uses this to scan your conveyance, your domicile, your storage shed or garage. The abuses of this agency is not merely legendary, it is infamous. Did you buy your guns privately (without papers), or through proper channels? If you did it privately so as to avoid registration (which is legal in many states), ATF may have a ‘heightened interest’ in your property. This van’s stated capabilities also include scanning for specific elements such as nitrogen and oxygen, or sulfur, or aluminum, or silver or gold. Should the government know whether you have silver/gold coin? Should the government know if you own machine tools such as a lathe? Or whether you make things using press-form technology and powdered aluminum, etc? The purpose of this technology is to identify private citizens who possess the resources, materials, and equipment that would be valuable to a resistance movement. This technology is …
Texas Instruments Makes HPC Play with New Multicore DSP Chips
Texas Instruments Makes HPC Play with New Multicore DSP Chips
When Texas Instruments (TI) added floating point smarts to its new digital signal processor (DSP) to support the fourth-generation wireless standard, it found itself with a commercial chip that had some of the most impressive flops/watt performance on …
Read more on HPCwire
Axxcelera Broadband Selects Freescale Processors to Power Next Generation LTE …
The Axxcelera eNodeBs will incorporate one of Freescale's QorIQ Qonverge systems on chip and the six-core MSC8157 digital signal processor (DSP). The QorIQ Qonverge device is a base station-on-chip based on a common architecture. …
Read more on MarketWatch (press release)
Latest Amateur Radio News
Mercer County ham radio operators needed to assist in emergencies
By Chuck Gysi Mercer County's amateur radio operators are needed to provide communications assistance in emergency and disaster situations. The Mercer County Emergency Management Agency is recruiting hams to become a part of the Mercer County Amateur …
Read more on Aledo Times Record
Local amateur radio club honours 150th birthday of Dr. James Naismith
This occurred nine years later (1900) when Reginald Fessenden – born in East Bolton (Canada's Eastern Townships) – transmitted speech by radio waves. This weekend (Nov. 5-6) the Almonte Amateur Radio Club (AARC) will commemorate the 150th anniversary …
Read more on EMC Almonte/Carleton Place
Cool APRS images
Some cool APRS images:
aprs terminal arduino pro
Image by mpechner
aprs terminal callsign entered
Image by mpechner
aprs terminal arduino pro
Image by mpechner
APRS VX-8R K2FR Setting up APRS
Me setting up my new HT for APRS. I went over this pretty quick, will probably do more videos about the radio in the near future.. Stay tuned
Measuring output from the FoxTrak, adjusting RV1
Some cool AFSK images:
Measuring output from the FoxTrak, adjusting RV1
Image by Richard Corfield (M0RJC)
Yaesu specify an input of 5mV into a 2K load. Here I have a 2K resistor across the radio connector. When I first set this up I pushed the resistor ends and the probe into the pins of the DB9 socket.
The FoxTrak has been commanded to output a mixed signal using its configuration program.
Certain disturbing sounds really do make your arm hairs stand up
Certain disturbing sounds really do make your arm hairs stand up
The same listeners then rated the pleasantness or unpleasantness of the sounds while researchers measured physical indicators of distress: the listeners' heart rate, blood pressure, and the electrical conductivity of their skin. …
Read more on Toronto Star
Space Tech Takes Bat Signal to Sea
When someone is lost at sea, the distress transmitter connects with the Cospas-Sarsat Search and Rescue system — satellites in space that listen around the clock for activated beacons in the 406 – 406.1 MHz frequency band. …
Read more on Fox News
A study aims to pinpoint why we hate certain sounds
The same listeners then rated the pleasantness or unpleasantness of the sounds while the researchers measured physical indicators of distress: the listeners' heart rate, blood pressure, and the electrical conductivity of their skin. …
Read more on Bend Bulletin