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Updated: 3 min 28 sec ago

Experiments Look to Leverage Low-Latency HF to Shave Microseconds off Trade Times

6 hours 51 min ago

Experimental operations now under way on HF appear aimed at leveraging low-latency HF propagation to shave microseconds from futures market trades and gain a competitive edge in a field where millionths of a second can mean winning or losing. Bloomberg on June 18 reported on a secretive antenna facility near Maple Park, in Kane County, Illinois, and speculated that futures traders might be looking to take advantage of lower-latency HF propagation over state-of-the-art microwave links and undersea cables, where even the slightest path delay could compromise a transaction. The facility is not far from a major futures data center. As the Bloomberg article explained, “Rapidly sending data from there to other important market centers can help the speediest traders profit from price differences for related assets. Those money-making opportunities often last only tiny fractions of a second.”

Radio amateur Bob Van Valzah, KE9YQ, said in a May blog post that he recently stumbled onto the first evidence of HF radio futures trading at a site in West Chicago, Illinois. There, he spotted HF log-period dipole arrays on a pole, and a microwave dish he determined was aimed at a Chicago Mercantile Exchange (CME) data center. Additional research led him to the antenna facility in Maple Park, Illinois, which also sported a microwave dish that appeared aimed in the direction of the CME data center. Two approximately 170-foot towers on the site support a directional wire array for HF. Van Valzah is a performance engineer on leave from the high-frequency — no pun intended — trading field.

Bloomberg said the company behind the Kane County project is New Line Networks, LLC, a joint venture of Chicago-based Jump Trading, LLC, and New York-based Virtu Financial, Inc. While no FCC Part 5 Experimental license appears to have been assigned to New Line Networks, WH2XVO is assigned to partner Virtu Financial, which assumed the license from Services Development Company LLC.

Sites listed on the license are Aurora and Chicago, Illinois, in addition to Homer, Alaska, and Secaucus, New Jersey — home to several financial firms and right across the Hudson River from many more in New York City. Part 5 Experimental license WI2XAJ has been assigned to Toggle Communications, which is using the West Chicago site and appears to be experimenting with a similar system from other sites. Other entities may also be conducting similar experiments.

The Experimental licensed systems use a variety of frequency shift-keying modes, including FSK, AFSK, QPSK, and 8-PSK, on frequencies ranging from about 6 MHz to 24 MHz and power levels from 20 kW ERP to nearly 50 kW ERP, depending on the Experimental license in question. Van Valzah pointed out in his blog post that, while HF is low bandwidth, unreliable, and expensive, “you can’t beat it for latency.”

Speculation is that the systems are taking advantage of software-defined radio (SDR) techniques and technology. Transmitter equipment information on the Experimental license application for WH2XVO was redacted from the public filing.

ARRL reached out to the point of contact listed on the WH2XVO application but has not heard back. — Thanks to Southgate Amateur Radio News for some information

Source:ARRL

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News Experiments Look to Leverage Low-Latency HF to Shave Microseconds off Trade Times June 20, 2018 No comments

Experimental operations now under way on HF appear aimed at leveraging low-latency HF propagation to shave microseconds from futures market trades and... Read more

Amateur Radio Honored in Advance of Field Day 2018 on June 23 – 24 June 20, 2018 No comments

Each year as ARRL Field Day approaches, state and local governments traditionally take advantage of the opportunity to honor Amateur Radio in the form... Read more

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Retevis RT83(GPS) 10W IP67 DMR Digital UHF Radio

8 hours 22 min ago
    1. Retevis RT83 with digital and analogue mode two way radio.

 

    1. Using TDMA technology, designed with Tier II,AMBE++ vocoder, compatible with mototrbo etc. DMR two way radio.

 

    1. IP67 waterproof and dust-proof function allow you use them anywhere without worrying the surrounding environment.

 

  1. The color display allows the user to check at a glance on operating status, including battery level, and caller identity etc.

Main feature:

  • IP67 waterproof
  • GPS function
  • Digital and analogue mode
  • 2 slot TDMA
  • 2 time slot direct mode (DCDM)
  • 1024channels/64zone(max 16 channels Per Zone)
  • Single/group/all call
  • High/Low power selectable
  • Digital encryption
  • Emergency alert
  • VOX function
  • Scan function
  • Message function

Specification:

General Frequency range 400-470MHz Channel capacity 1024 channels Channel spacing 12.5KHz Working voltage 7.4V Battery capacity 2800mAh(Li-ion) Working temperature -40℃- +85℃ Antenna impedance 50Ω Audio output power ≤1000mw@16 Dimension 148*56*39mm

Receive

Analog sensibility 0.35uV/-116dbm(20db SINDA) 0.22uV/-120dbm(type) Digital sensibility 0.3uV/-117.4dbm (BER5%)
0.7uV/-110dbm (BER1%) Common channel Rej ection ≥-12dB Adj acent channel selectivity TIA603C:65dB ETSI:60dB Spurious response TIA603C:75dB ETSI:70dB Audio power 1W Audio response 1db- -3db Rated audio distortion ≤3%

Transmitter

Output power 10W/4W Frequency stability ±1.0ppm Adjacent channel power ≤-60dbm Free time slot power TDMA:≤-57dBm FM modulation mode 12.5KHz:11K0F3E Modulation deviation 2.5KHz:@12.5KHz Nonactive slot power -57dBm 4FSK digital mode 12.5KHz(date only):7K60FXD
12.5KHz(date +voice):7K60FXE Modulation BER ≤5% Vocoder type AMBE++

Package includes:

  • 1 x RT83 two way radio
  • 2 x Antenna
  • 1 x Adapter
  • 1 x Charger
  • 1 x Belt clip
  • 1 x User manual
  • $149.00

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Amateur Radio Honored in Advance of Field Day 2018 on June 23 – 24

9 hours 52 min ago

Each year as ARRL Field Day approaches, state and local governments traditionally take advantage of the opportunity to honor Amateur Radio in the form of various proclamations. This list of those that took part is not necessarily comprehensive.

  • In Alabama, Governor Kay Ivey proclaimed June 18 – 24 as “Amateur Radio Week.” A delegation of radio amateurs from around the state were on hand as Governor Ivey signed the proclamation.
  • In Idaho, Governor C.L. “Butch” Otter has proclaimed June 18 – 24 as “Amateur Radio Week.” The proclamation declares that Amateur Radio has proved its relevance in the modern world by providing emergency communications when other system failed in the wake of hurricanes and other disasters.
  • In Massachusetts, at the urging of State Senator Bruce Tarr, N1UIU, Massachusetts Governor Charles Baker signed a proclamation declaring June 24 as “Amateur Radio Day” in the Bay State.
  • In South Carolina, Governor Henry McMaster has declared the week of June 18 – 24 as “Amateur Radio Week.” He encouraged South Carolinians to recognize radio amateurs for “their many contributions, including emergency communications and other public service work, to the continued safety of the residents of the Palmetto State.”
  • In the state of Washington, Governor Jay Inslee proclaimed the week of June 18 – 24 as “Amateur Radio Week,” encouraging recognition of the importance of Amateur Radio operators, “on whom we can rely during emergencies or disasters within the state.”
  • The Orange Park, Florida, Town Council designated June 18 – 24 as “Amateur Radio Week,” recognizing Amateur Radio’s role in furthering international goodwill as well as its public service in disasters, emergencies, and during public events.
  • The Town Board of Cicero, New York, recognized the Liverpool Amateur Radio Club for its “fundamental role in disaster communications” for the town. The Town Board cited LARC’s participation in Field Day at William Park on Field Day weekend.
  • The City Council of Goose Creek, South Carolina, proclaimed June 17 – 23 as “Amateur Radio Week.” Mayor Greg Habib said radio amateurs “further demonstrate their value in public assistance by providing free radio communications for local events.”
  • The City of Midland, Michigan, proclaimed June 18 – 24 as “Amateur Radio Week” in that community, recognizing “the efforts of ham radio operators, especially during times of emergency.” Mayor Maureen Donker presented Midland Amateur Radio Club President Al Bailey with the proclamation on June 11 during a City Council meeting.
  • The Volusia County, Florida, County Council has designated June 17 – 24 as “CQ Florida Amateur Radio Week,” honoring Amateur Radio generally and the group CQ Florida in particular. The Council urged residents to honor Amateur Radio operators “for providing a bridge between peoples, societies and countries by creating friendships and sharing information.”
  • In Ohio, the Hancock County Commission designated June 18 – 24 as “Amateur Radio Week,” noting that the Hancock AuxComm Team will host a Field Day event at Clarke Field in Newell.

More than 1,400 clubs and groups in the US and Canada have let ARRL know of their plans to be on the air for Field Day by registering their locations on the Field Day locator page.

Source:ARRL

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ARISS-Russia FM transmissions from Space Station

Tue, 06/19/2018 - 1:49pm

On June 20 and 21, the Tanusha satellites will be connected to an antenna on the ISS Russian Service Module and transmit voice messages on 437.050 MHz FM with 145.800 MHz FM relay.

The AMSAT-NA website says:

ARISS-Russia, in collaboration with the Southwest State University in Kursk, Russia, are developing a series of educational CubeSat satellites called Tanusha.

Two Tanusha CubeSats were developed by students at Southwest State University and were hand-deployed by cosmonauts during an August 2017 extravehicular activity. These two CubeSats are performing cluster flight experiments through communications links.

A second set of CubeSats, Tanusha 3 & 4 were launched earlier this year and are currently on-board ISS. Tanusha 3 & 4 are planned to be hand deployed by Cosmonauts in August. They will perform even more comprehensive cluster flight objectives than Tanusha 1 & 2.

On June 20, Tanusha 3 will be connected to one of the ARISS Service Module antennas and will transmit from 0730-1200 UTC on 437.05 MHz. These FM transmissions will include greetings from students in several languages, including Russian, English, Spanish and Chinese.

On June 21, Tanusha 4 will be connected to one of the ARISS Service Module antennas and will transmit from 0730-1200 UTC on the same frequency: 437.050 MHz.

The ARISS-Russia team plan to also retransmit these signals on the standard ARISS 2-meter downlink, 145.80 MHz using the JVC Kenwood D700 radio that is still on-board ISS. All are invited to listen to the CubeSats from ISS on 437.050 and/or 145.800 MHz FM.

Note: the Doppler shift for the 437.050 MHz signal will be +/-10 kHz.

Source https://www.amsat.org/upcoming-ariss-russia-voice-greetings-sstv-transmissions-from-the-iss/

How to hear the ISS, links to online tracker, online 145/437 MHz radios, etc
https://amsat-uk.org/beginners/how-to-hear-the-iss/

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DXpedition Team Set to Depart for Baker Island, Ducie Island Preparations on Target

Tue, 06/19/2018 - 11:19am

Two major DXpeditions are on track to make many DXers happy campers this year. Just ahead is the KH1/KH7Z Baker Island DXpedition, which commemorates the 81st anniversary of aviator Amelia Earhart’s disappearance on July 2, 1937, near Baker and Howland islands, as well as “the commitment and sacrifices” of the Hui Panalā’au (loosely translates to “society of colonists”) — young high school graduates from Hawaii who were taken to colonize Baker, Howland, and Jarvis islands from 1935 until 1942, and who began construction of a runway for Earhart to land in 1937. The islands were bombed the day after Pearl Harbor, killing two, and the colonists were removed by the US Coast Guard in 1942.

The team’s enthusiasm level was reported to be high, as the KH1/KH7Z Baker Island team prepared to depart Pago Pago, American Samoa, on June 20 aboard the Nai’a, en route to Baker Island. The DXpedition is scheduled to fire up around 0000 UTC on June 28, with eight operating positions active on all open bands. The team will be on the air around the clock — and on 20 meters continuously — for the following 10 days. The KH1/KH7Z team consists of 14 operators.

“But any plan is only good until you meet the enemy in the field of battle,” the Baker Island DXpedition team said in a news release. “We plan on listening to our pilots. Please tell them if we are missing an opening or opportunity. We can and will adjust to the propagation.” Baker Island is the fifth Most-Wanted DXCC entity, according to Club Log.

As reported, KH1/KH7X will employ FT8 digital mode to find openings that might not be obvious and to serve as a beacon. “When we find an opening, we will put as many radios/modes/ops on as we can,” the team said.

The KH1/KH7X group helped to develop the WSJT-X software version that incorporates an FT8 DXpedition Mode (version 1.9.0). The DXpedition said using FT8 DXpedition mode may allow the operators to “expand” the bands they are able to use at this point in the solar cycle. The DXpedition’s band plan page includes a guide to using FT8 DXpedition Mode. The Dateline DX Association (DDXA) is sponsoring the DXpedition to Baker Island. The Pacific Islands Refuges and Monuments Office of the US Fish and Wildlife Service granted the DDXA permission to land and operate on the uninhabited island.

Ducie Island (VP6D)

Meanwhile, the VP6D Ducie Island DXpedition reports that its preparations remain on schedule for its October 20 – November 3 operation. The DXpedition has announced that 15-year-old Mason Matrazzo, KM4SII, of Clemmons, South Carolina, will join the VP6D Pilot Team. In 2017, he operated from Iceland as TF/KM4SII, and in July 2018, he will operate from Curacao as PJ2/KM4SII. Mason will work with North America and Chief Pilot Glenn Petri, KE4KY.

The Braveheart, owned by Nigel Jolly, K6NRJ, will transport the 14-member Ducie Island team to its South Pacific destination in September, sailing from Mangareva, French Polynesia. The Perseverance DX Group (PDXG) is sponsoring the VP6D DXpedition. Ducie Island is the 26th Most-Wanted DXCC entity, according to Club Log.

Source:ARRL

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Jim W6LG Uses A Short Dipole To Demonstrate How A Dipole Functions

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Jim makes and then shows his tunable half wavelength dipole antenna. Using an antenna analyzer,

Jim finds the resonant frequency and the lowest SWR do not occur at the same frequency.

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Ham Radio Deluxe 6.4.0.846 has been released

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NEW ONLINE Manual – please consider visiting our wiki at: https://wiki.ham-radio-deluxe.com

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ITU officially confirms: Z6 prefix is illegal

Sun, 06/17/2018 - 8:58am

“In a repost by YT9TP (Serbia) it would appear that the International Telecommunication Union has officially confirmed use of the Z6 prefix is illegal.

This from ITU Operational Bulletin No. 1149, Jun”e 1st 2018.

Call sign series can be allocated only to the administrations of the ITU Member States by world radio communication conferences or, between
radio communication conferences, by the ITU Secretary-General.

In this respect, the attention of the ITU administrations is drawn to the
fact that ITU has not allocated call sign series Z6 to any of its Member States. Consequently, the utilization of call signs series Z6 by any entity without a formal allocation and consent of the ITU represents an unauthorized and illegal usage of this international numbering resource.”

Source:SouthGate

https://www.itu.int/dms_pub/itu-t/opb/sp/T-SP-OB.1149-2018-OAS-PDF-E.pdf

https://www.itu.int/pub/T-SP-OB.1149-2018

 

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5 reasons Hamvention is one of the most unique events on Dayton’s calendar

Sat, 06/16/2018 - 8:44am

by Nick Blizzard

Drone video of the Dayton Amateur Radio Associations’ Hamvention 2018 at the Greene County Fairgrounds and Expo Center  

— An event that has become a Dayton tradition is in full force this weekend.

Dayton Hamvention 2018 is happening at the Greene County Fairgrounds through Sunday. The event is in its seventh decade, draws thousands and provides an economic boost to the Dayton area.

Read Full Article: Link

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Equipment Tecsun S2000 April 02, 2015 No comments

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Digital Modes Third Public Test of FT8 DXpediton Mode Deemed a Success May 09, 2018 No comments

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Release: WSJT-X Version 1.9.0-rc4 April 29, 2018 No comments

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Second Public Test of FT8 DXpedition Mode Demonstrates High Contact Rates Possible April 10, 2018 No comments

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MixW 4 is a new multi-mode, multi-platform software for radio amateurs. April 06, 2018 No comments

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Second Test of FT8 DXpedition Mode Set for April 7 April 03, 2018 No comments

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70MHz experimental NoVs now easier

Fri, 06/15/2018 - 11:25am

Following agreement with Ofcom, the RSGB is pleased to announce that a new much faster online process is now available for all Full Licensees to access the 70.5-71.5MHz experimental band.

Applications can now be made online for a new, annually-renewable Notice of Variation.

It works in a similar way to the 146-147MHz NoV.

This replaces the previous special research permit process and is expected to spur digital innovation at VHF.

Prospective applicants should ensure they read the supplementary information and must observe the NoV power and geographic restrictions.

Source:RSGB

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HF Log Periodic Antenna LP-1005AA ( 3.0 – 30.0 MHz ) February 03, 2015 No comments

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Digital Modes Third Public Test of FT8 DXpediton Mode Deemed a Success May 09, 2018 No comments

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Second Public Test of FT8 DXpedition Mode Demonstrates High Contact Rates Possible April 10, 2018 No comments

The second public test of FT8 DXpedition Mode has shown that the mock DXpedition stations (“Foxes”) were able to work the pileups of callers (“Hounds”... Read more

News 70MHz experimental NoVs now easier June 15, 2018 No comments

Following agreement with Ofcom, the RSGB is pleased to announce that a new much faster online process is now available for all Full Licensees to acces... Read more

Former Radio Amateur-Astronaut Named as Spain’s Minister of Science June 15, 2018 No comments

Amateur Radio operator and European Space Agency (ESA) astronaut Petro Duque, ex-KC5RGG/ED4ISS, has been named as the Minister of Science in the new S... Read more

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Former Radio Amateur-Astronaut Named as Spain’s Minister of Science

Fri, 06/15/2018 - 11:16am

Amateur Radio operator and European Space Agency (ESA) astronaut Petro Duque, ex-KC5RGG/ED4ISS, has been named as the Minister of Science in the new Spanish government. Duque, 55, first went into space aboard the Shuttle Discovery in 1998, and in 2003 he spent a week on the International Space Station, carrying out Amateur Radio on the International Space Station (ARISS) contacts with two schools in Spain.

Duque went to the ISS under a commercial agreement between the Russian space agency and the ESA. He also conducted a series of scientific studies during his ISS stay. Duque was Spain’s first astronaut.

Source:ARRL

(adsbygoogle = window.adsbygoogle || []).push({}); Equipment PowerPlus – Rugged Portable DC Power Management System June 15, 2018 No comments

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PowerPlus – Rugged Portable DC Power Management System

Fri, 06/15/2018 - 7:40am
DESCRIPTION Rugged Portable DC Power Management System with built-in High-Efficiency Battery Charger! 

> High contrast OLED display 
> Power management includes current and voltage readout and user-managed DC outputs
> Built-in UPS creates seamless transition between DC power and backup battery 
> Dual USB charging outputs for peripherals
> Visual and audible indication of low battery voltage or pending disconnect 
> Maximum current handling capacity – 40 amps  OWERplus is a remarkably compact, high power DC power system specifically designed for radio communications. It is a highly integrated product combining the function of a 12 VDC Uninterruptible Power System (UPS), high capacity battery charger, power distribution and capable power monitoring.

Its rugged design works well in both field, mobile and base station applications providing both automatic power changeover in the event of loss of DC power as well as built in battery charging capability for batteries with capacity up to 100Ah. 

Multiple overload protected outputs and built in USB charger ports make this a powerful combination of features simplifying the station, improving reliability and reducing the clutter of messy and inefficient DC wiring. The interconnections between all of these functions are handled internally within POWERplus.

Here is what POWERplus does:

• UPS
o Automatic changeover between DC power and emergency backup battery

• BATTERY CHARGER
o Multi-chemistry 3 and 4 stage high efficiency charger
o Adjustable charge rate and current monitoring

• USB CHARGER
o Dual USB charger outputs for phone/tablet/LED light charging
o Current limited outputs

• POWER MANAGEMENT
o Automatically disconnects the radio if the battery voltage is too high to protect your radio if something goes wrong with your DC Input.
o Monitors the battery and alerts you if the battery is getting too low and will even automatically disconnect to protect the battery from deep discharge.
o User adjustable DC output current limits
o Manual or automatic control of output groups

• POWER REPORTING
o Realtime monitoring of DC power supply and battery voltage and current
o Realtime monitoring of output loads
o Graphical indication of instantaneous load current

• ALARMS
o Visual and audible indication of low battery voltage or pending disconnect This rugged DC power management device + battery charger handles a variety of tasks and replaces a large number of other devices. 

Weight:. 11.3 ounces

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Fldigi v4.0.17 now available

Fri, 06/15/2018 - 7:29am

The hard-working development team led by W1HKJ have announced the release of Fldigi v4.0.17.  This update release of Fldigi brings several bug fixes, performance improvements and several new features..  Full details are available in the ReadMe file available for download and below this announcement.

As with all of the FL suite, Fldigi continues to support both PowerPC and Intel (i386) processors; with individual downloads available for each architecture and can be downloaded here.

Version 4.0.17 Update release:

  •   flarq idtimer
    • Add 10 minute id timer to statFrame
  • Greek language update
    • updated el.po submitted by Haris, SV1GRB
  • Documentation Update
    • Add nanoCW, nanoFSK, Navigator interface.
    • Update macro matrix display (48 macros in 4 rows.
  • xmlrpc cat string
    • add send cat string to flrig similar to <RIGCAT macro
  • tmpfile
    • tmpfile() is apparently not thread safe on OS X
    • remove usage from SoundBase::format_supported(…)
  • Serial port discovery
    • Add /dev/rfcomm? blue tooth serial device names to serial device list
  • Log entries
    • Change mode entry for Olivia, MT63, Thor, Throb to include submode.
      • allows correct setting of mode / submode when retrieving a logbook entry.
  • rx/tx
    • correct action of tx over rx toggle
  • RTTY Quick pick
    • disable RTTY quick pick if using nanoIO or Navigator
  • flarq appdir
    • change test for FL_APPS folder
  • WinKey PTT
    • Enable winkey PTT
  • CW/FSK I/O on start
    • restore last connect state of Nav / tinyCW / tinyFSK when starting program
  • Default Lighted Button
    • Allow user to specify the default ON color for all lighted buttons not specifically configured.
  • ST/PR macro tags
    • Add macro tags for State and Province
  • Logbook read
    • Make Rx panel announcement of read user optional
  • Navigator
    • Add Navigator terminal unit support for FSK options setting panel
      •   RTTY browser decode
        • fix browser decoder sense when transceiver is in LSB type mode, i.e. FSK, LSB, LSB-D etc.
      •   8pskF
        • Fixed bug in 8psk 125F/250F init code
          • Bad constraint length was causing decoder to fail
        • New preamble for 8PSK FEC modes
          • FEC modes preamble is now a continuous tone at center-frequency
          • Gives reference for clicking &  selecting signal on waterfall.
          • Is backwards compatible with  previous-version 8psk preambles
        • Adjusted 8PSK-F modes flush/postamble length much longer
        • Can visually see the inlv flush and postamble “tail” on  waterfall
        • New flust/postamble extends beyond data, to prevent cutoff
        • Code, formatting, and comments cleaned-up for 8PSK code
  • nanoIO is the interface code for the device nanoIO, an Arduino project that provide hard line keying of CW and FSK
    • nanoFSK
      • Add interface and support code for nanoIO / tinyFSK Arduino FSK keyers
      • Modify waterfall frequency display for transceiver FSK
      • Modify dxcluster qsy operations to provide correct QSY for transceiver FSK
      • Add TTY transceiver mode recognition if transceiver mode string contains RTTY or FSK
    • nanoCW
      • Add CW support using nanoIO
      • CW WPM 5 to 100
      • CW dash/dot ratio: 2.5 to 3.5
  • quick pick rtty baud
    • add 100 Baud nanoIO
  • K2/K3/KX3 data modes
    • Add DATA / DATA-R as FSK type submodes if either tinyFSK, Navigator or Right-Channel FSK signaling interface is enabled¸
  • Modem start frequency
    • Change initialization of modem start up frequency – prevent unintended start @ 1000 Hz for every change in mode.
    • Modem startup will honor the sweet spot frequency unless it is incompatible with the modem requirement
  • fsq/ifkp audit logs
    • Enable audit log open/close from configuration panel
    • Correct date-time stamp in logs
  • RTTY browser decode
    • fix browser decoder sense when transceiver is in LSB type mode, i.e. FSK, LSB, LSB-D etc. 8pskF
    • Fixed bug in 8psk 125F/250F init code
      • Bad constraint length was causing decoder to fail
    • New preamble for 8PSK FEC modes
      • FEC modes preamble is now a continuous tone at center-frequency
      • Gives reference for clicking & selecting signal on waterfall.
      • Is backwards compatible with previous-version 8psk preambles
    • Adjusted 8PSK-F modes flush/postamble length much longer
      • Can visually see the inlv flush and postamble “tail” on waterfall
      • New flust/postamble extends beyond data, to prevent cutoff
    • Code, formatting, and comments cleaned-up for 8PSK code

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Review IC-7300 [ Downloads ] Instruction Manual and Brochure September 05, 2016 No comments

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VHF Icom Provide Details of ID-4100E D-STAR VHF/UHF Mobile Radio March 01, 2017 No comments

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Announcing the Tytera MD-9600 DMR Digital Mobile Radio! March 19, 2016 No comments

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Kenwood TM-V71A Full Dual Bander 144/430MHz February 06, 2015 No comments

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MOTOTRBO XPR 7000 Series February 28, 2015 No comments

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Wouxun KG-D901 DMR Digital Radio Preview June 19, 2016 No comments

Key Features Unlike the 8D and 9D, the D901 is a single band transceiver, in your choice of either a UHF or VHF version. Most of the primary features... Read more

BCH-220 Handheld Radio July 16, 2015 No comments

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News Space Station Digital Amateur Radio TV System Transmitter Determined to be Defective June 14, 2018 No comments

The Amateur Radio on the International Space Station (ARISS) “Ham Video” digital Amateur Radio TV (DATV) transmitter on the International Space Statio... Read more

Sweden’s SAQ Announces Annual Alexanderson Day VLF Transmission on July 1 June 14, 2018 No comments

Sweden’s World Heritage Grimeton Radio Station SAQ Alexanderson alternator will be on the air on July 1 on 17.2 kHz for its annual Alexanderson Day tr... Read more

Reverse Beacon Network Beta Testing Separate Spot Stream for FT8 June 13, 2018 No comments

As a beta test, the popular Reverse Beacon Network (RBN) has announced that it’s now offering a separate telnet feed for FT8 spots (telnet.reversebeac... Read more

Canadian Radio Amateurs Petition Parliament to End Deliberate Interference June 12, 2018 No comments

Radio Amateurs in Canada — primarily in the Province of Quebec — have mounted a petition drive demanding that members of the House of Commons prompt d... Read more

CAMSAT Offers More Details on New Satellites, One Carrying HF Transponders June 12, 2018 No comments

CAMSAT, China’s Amateur Radio Satellite organization, has offered additional details about the three Amateur Radio satellites it plans to launch later... Read more

Iranian Radars Showing Up on 10 Meters June 12, 2018 No comments

While 10 meters has not been the hottest band in the Amateur Radio toolkit of late, Iran apparently has found it an ideal spot to operate various rada... Read more

Digital Modes Third Public Test of FT8 DXpediton Mode Deemed a Success May 09, 2018 No comments

The third public test of FT8 DXpedition Mode on May 5 is being called a success. The goal of the exercise was to simulate a rare DXpedition pileup on... Read more

Release: WSJT-X Version 1.9.0-rc4 April 29, 2018 No comments

Changes from WSJT-X Version 1.9.0-rc3 include the following: – Corrected a number of flaws in Fox and Hound behavior, FT8 DXpedition Mode... Read more

A New Spin on JT Alert HRD Logbook and WSJT X April 11, 2018 No comments

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Second Public Test of FT8 DXpedition Mode Demonstrates High Contact Rates Possible April 10, 2018 No comments

The second public test of FT8 DXpedition Mode has shown that the mock DXpedition stations (“Foxes”) were able to work the pileups of callers (“Hounds”... Read more

MixW 4 is a new multi-mode, multi-platform software for radio amateurs. April 06, 2018 No comments

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Second Test of FT8 DXpedition Mode Set for April 7 April 03, 2018 No comments

The second public test of FT8 DXpedition Mode will take place on April 7, and all radio amateurs are invited to participate. WSJT-X Developer Joe Tayl... Read more

Space Station Digital Amateur Radio TV System Transmitter Determined to be Defective

Thu, 06/14/2018 - 1:29pm

The Amateur Radio on the International Space Station (ARISS) “Ham Video” digital Amateur Radio TV (DATV) transmitter on the International Space Station (ISS) is reported to be defective, with onboard repair not possible. Also known as HamTV, the DATV system stopped working in mid-April, and a subsequent test on June 1 using a second L/S band patch antenna on the Columbus module had failed. ARISS-EU Mentor Gaston Bertels, ON4WF, said ARISS plans to return the transmitter to Earth to repair, pending space agency approvals and availability of ARISS funds.

“Schools and crew members performing educational ARISS school contacts are delighted to use Ham Video,” Bertels said. “We will do the best we can to restart this service as soon as possible.”

Following extensive testing, the Ham TV system was first used for an ARISS school contact in February 2016. — Thanks to ARISS

Source:ARRL

App - Mobile EchoLink for iOS version 2.10.18 is now available May 07, 2018 No comments

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Ham radio Foundation course for iOS and Android February 01, 2016 No comments

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My LoTW – Free app for iOS and Android June 08, 2016 No comments

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Tutorial – Using the new routing function in RT Systems featuring RFinder March 29, 2015 No comments

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Review Icom RS-BA1- Installing & Setting up Remote Control for your IC-7300 March 10, 2017 No comments

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Download the IC-7610 HF/50MHz SDR Transceiver User Manual October 13, 2017 No comments

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Upgraded Baofeng DM-5R Can Communicate with a Motorola Radio October 19, 2016 No comments

Today Radioddity published in his fanpage on Facebook, this video below. check it! “DM-5R with Motorola DB4801e – TDMA vs. FDMA/CW…... Read more

Icom IC-7300 vs K3s Elecraft [ Video´s ] April 11, 2016 No comments

Tested at night on 40m with QRM from BC stations. All controls set equal. Identical speakers. Antenna switched A/B. Keep in mind that I can fiddle wit... Read more

KM4IPF Shows the Template for the HF Go Box that Will be Used for Our Dry Tortugas DXpedition April 27, 2018 No comments

“KM4IPF, AE4FH, and WX4TV are planning a mini DXpedition to the Dry Tortugas later this year and we are building an HF go box to hold the Yaesu... Read more

“Automatic Gain Control” is the topic of the latest episode of the “ARRL The Doctor is In” podcast February 01, 2018 No comments

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Equipment NEW PRODUCT: Lightweight PowerPole Fused DC Panel November 10, 2015 No comments

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AR5001D 40kHz-3.15GHz, Professional Grade Communications Receiver February 16, 2016 No comments

AR5001D 40kHz-3.15GHz Cellular frequencies blocked on USA version; unblocked version available to qualified entities, documentation required. Download... Read more

GHD Keys by JA7GHD January 01, 2015 No comments

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DX-Patrol SDR ( Software Defined Radio ) Receiver with wide receiving range January 26, 2015 No comments

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Radioenge – RA-S1 – Antenna Rotator System May 16, 2015 No comments

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Digital Modes Third Public Test of FT8 DXpediton Mode Deemed a Success May 09, 2018 No comments

The third public test of FT8 DXpedition Mode on May 5 is being called a success. The goal of the exercise was to simulate a rare DXpedition pileup on... Read more

Release: WSJT-X Version 1.9.0-rc4 April 29, 2018 No comments

Changes from WSJT-X Version 1.9.0-rc3 include the following: – Corrected a number of flaws in Fox and Hound behavior, FT8 DXpedition Mode... Read more

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Second Public Test of FT8 DXpedition Mode Demonstrates High Contact Rates Possible April 10, 2018 No comments

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MixW 4 is a new multi-mode, multi-platform software for radio amateurs. April 06, 2018 No comments

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Second Test of FT8 DXpedition Mode Set for April 7 April 03, 2018 No comments

The second public test of FT8 DXpedition Mode will take place on April 7, and all radio amateurs are invited to participate. WSJT-X Developer Joe Tayl... Read more

A Pause in Storming : Solar Storm Forecast 06-14-2018

Thu, 06/14/2018 - 11:55am

“Space Weather quiets down this week as the hoped for mini-solarstorm misses Earth to the south. Aurora photographers will need to wait a while longer before another coronal hole rotates into the Earth-strike zone and sends us a new chance for a solar storm. Amateur radio operators are smiling this week as a new region rotates into Earth view, boosting the solar flux back into marginal levels for radio propagation. This region will be joined by a second region next week that should boost solar flux even more, just in time for Field Day 2018. GPS users should also be enjoying good signals this week. However, glitches may increase at low latitudes next week once that second active region rotates into view. Learn the details of these new regions, what’s coming from the Sun’s backside, and see what else the Sun has in store!

(adsbygoogle = window.adsbygoogle || []).push({}); Equipment Icom IC-R8500 Communications Receiver May 13, 2016 No comments

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What is Echolink? Ham Radio 2.0: Episode 56 September 01, 2016 No comments

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Ham radio Foundation course for iOS and Android February 01, 2016 No comments

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Software WSJT-X Version 1.9.0-rc4 May 29, 2018 No comments

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SmartSDR v2.2.8 Now Available May 15, 2018 No comments

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GridTracker – WSJT-X or JTDX decodes April 06, 2018 No comments

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News Space Station Digital Amateur Radio TV System Transmitter Determined to be Defective June 14, 2018 No comments

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Sweden’s SAQ Announces Annual Alexanderson Day VLF Transmission on July 1 June 14, 2018 No comments

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Reverse Beacon Network Beta Testing Separate Spot Stream for FT8 June 13, 2018 No comments

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Radio Amateurs in Canada — primarily in the Province of Quebec — have mounted a petition drive demanding that members of the House of Commons prompt d... Read more

CAMSAT Offers More Details on New Satellites, One Carrying HF Transponders June 12, 2018 No comments

CAMSAT, China’s Amateur Radio Satellite organization, has offered additional details about the three Amateur Radio satellites it plans to launch later... Read more

Iranian Radars Showing Up on 10 Meters June 12, 2018 No comments

While 10 meters has not been the hottest band in the Amateur Radio toolkit of late, Iran apparently has found it an ideal spot to operate various rada... Read more

Sweden’s SAQ Announces Annual Alexanderson Day VLF Transmission on July 1

Thu, 06/14/2018 - 11:27am

Sweden’s World Heritage Grimeton Radio Station SAQ Alexanderson alternator will be on the air on July 1 on 17.2 kHz for its annual Alexanderson Day transmission. Three transmissions are scheduled: Startup/tuning at 0815 UTC, message transmission at 0845 UTC; startup/tuning at 1015 UTC, message transmission at 1045 UTC, and startup/tuning at 1215 UTC, message transmission at 1245 UTC. All three transmission events will be available via YouTube.

 

Amateur Radio Station SK6SAQ will be active on CW (7.035 MHz or 14.035 MHz) or SSB (3.755 MHz), with two operating positions planned. Send reports to SAQ and SK6SAQ via email or the bureau. The World Heritage Grimeton Radio station site will be open to the public on Alexanderson Day.

Source:ARRL

(adsbygoogle = window.adsbygoogle || []).push({}); VHF ID-4100 – Icom Catalog Scan – Japanese March 12, 2017 No comments

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Two new Wouxun mobile radios have lower prices December 17, 2017 No comments

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DIY How To Build A Solar Powered Radio Communications Go Box- The Ham-O-Can October 18, 2016 No comments

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Sending CW With a Straight Key–Morse Code January 21, 2017 No comments

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One-Day Tech Class Videos: Using Coax, SWR, Antenna Tuners October 26, 2016 No comments

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Introduction to Icom’s Touch screen ID-5100 Dual Band D-STAR Mobile Radio August 31, 2015 No comments

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Equipment DX Engineering BRAND NEW Catalog October 17, 2016 No comments

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ASTRON POWER SUPPLIES – Catalog February 16, 2016 No comments

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Mizuho MX2 Handheld SSB/CW Transceiver – 144MHz June 11, 2015 No comments

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SPE Expert 2K-FA Linear Amplifier October 06, 2015 No comments

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AR-ALPHA 10kHz-3500MHz, Digitally processed Professional Grade, Base Type October 31, 2015 No comments

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LNR FX-4A QRP HF Transceiver August 24, 2015 No comments

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Antenna InnovAntennas ‘Big Gun’ arrays June 20, 2017 No comments

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RSPduo gives outstanding results vs a rig costing 10X the price!

Wed, 06/13/2018 - 12:52pm

This video, released today by AE5X shows how well the RSPduo performs up against the Flex6300:

(adsbygoogle = window.adsbygoogle || []).push({}); Antenna RQ-84 – The classic “Quad” full-size has ten elements for 10m, eight – 15 m, six – 20 m, and four full-size elements on 40m band August 18, 2015 No comments

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Amateur Radio Tower Stand – KG0ZZ’s September 30, 2015 No comments

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Coil-loaded 40/80 Meter Inverted V Dipole Antenna by KG0ZZ September 11, 2015 No comments

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Isotron ISO-8040 – 2 Band HF 80 & 40 Meter Antenna Combination September 03, 2015 No comments

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News Reverse Beacon Network Beta Testing Separate Spot Stream for FT8 June 13, 2018 No comments

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Canadian Radio Amateurs Petition Parliament to End Deliberate Interference June 12, 2018 No comments

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VERO China New Arrival: 40 Watts Dual Band Mobile Radio VR-6900 With Band Scope and APRS Display

Wed, 06/13/2018 - 8:54am

 

Firmware upgrade remote VR-6900 can update firmware remotely, fix some bugs when find it

 

Optional APRS VR-6900 support the optional APRS and display the info on le TFT LCD display

 

Optional Bluetooth Speaker Micrphone VR-6900 support connect the Bluetooth speaker microphone Band Scope VR-6900 support muitl band scope search
1: Frequency Mode Search
2, Band mode Search
3. Channel Mode Search Wide Band Frequency TX:136-174&400-480MHz

RX: 78-108Mhz   108-136MHz     136-174MHz
350-400MHz    400-480MHz   480-520 MHz High Power Output VR-6900 has adjustable power function
1, UHF : 40w (High) 25 W (Mid) 8W (Low)
2, VHF : 45w (High) 25 W (Mid) 8W (Low) APRS Display (Optional) TX:136-174&400-480MHz

RX: 78-108Mhz  108-136MHz     136-174MHz
350-400MHz     400-480MHz    480-520 MHz Cross-Band /In-Band Repeater Connector VR-6900 support connect a extra handheld radio to be a Cross-Band repeater or In-Band repeater. Zone Function VR-6900 support A B C D zone,each zone has 128 channesl.Total 512 channels REMOVABLE PANNEL VR-6900 the body and the panel removable, it very easy to install in the car, The body is in the trunk of the car, and the panel is freely installed in the cab

 

(adsbygoogle = window.adsbygoogle || []).push({}); Review “S-Units” is the topic of the episode of the “ARRL The Doctor is In” August 24, 2017 No comments

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Reverse Beacon Network Beta Testing Separate Spot Stream for FT8

Wed, 06/13/2018 - 6:18am

As a beta test, the popular Reverse Beacon Network (RBNhas announced that it’s now offering a separate telnet feed for FT8 spots (telnet.reversebeacon.net port 7001), in addition to the current spot feed (telnet.reversebeacon.net port 7000), which will be repurposed to handle only CW and RTTY spots. In addition, a beta version of Aggregator Version 5 that can handle FT8 spots received from WSJT-Xwill be available on the RBN website, with instructions on how RBN node operators can configure their nodes to spot FT8 call signs on one or more bands; this will not interfere with the ability to spot CW and RTTY call signs, the RBN team assured in its announcement, explaining its reasoning for the move. The beta test follows a limited alpha test aimed at getting a feel for the spot load and other implications of carrying FT8 spots on the RBN.

“The most striking characteristic of FT8 spots is their sheer quantity,” the RBN announcement said, citing weekday statistics from May 23 and 24 when FT8 spots represented 86% and 87% of all spots, respectively, while CW spots were 13% and 14%, respectively, and RTTY spots were below 1%. Throughput on both days totaled some 30,000 spots.

“Whether due to the startling popularity of the new mode, or to the ability to spot stations at 22 dB below the noise level, it seems obvious that adding FT8 spots to our spot flow could have a huge impact on the infrastructure of the RBN,” the RBN announcement said. “These numbers suggest that if only 20 – 30 RBN nodes added FT8 spots, those spots could outnumber the total CW and RTTY spots being delivered by the 140 – 150 nodes currently active on the network, doubling the total required throughput.”

The RBN team said it wanted to find out whether RBN servers would be up to the task before the fall contest season. “Operators of ‘retail’ DX clusters are encouraged to offer the option of RBN spots with and without FT8 spots, as they now often give users a choice between spot streams with and without Skimmerspots, and to advertise when they begin to carry FT8 spots,” the announcement said.

A beta version of Aggregator Version 5 that can handle FT8 spots received from WSJT-X will be available on the RBN website, along with instructions on how RBN node operators can configure their nodes to spot FT8 signals on one or more bands.

“We will closely monitor how the RBN servers handle this new load, as more and more nodes begin sending FT8 spots,” the announcement said, adding that the RBN reserves the right to take any necessary steps to protect the core mission of the RBN, including shutting off the FT8 stream on major CW and RTTY contest weekends or discontinuing FT8 spotting altogether. Even then, PSKReporter would continue to carry FT8 spots, the announcement pointed out.

“We hope we’re not doing this in a vacuum,” the RBN team said, noting that it’s been collecting the views of contesters and DXers, “and we think that we’re headed in the right direction.”

The RBN team consists of KM3T, N4ZR, PY1NB, SV3SJ, and W3OA.   

Source:ARRL

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Canadian Radio Amateurs Petition Parliament to End Deliberate Interference

Tue, 06/12/2018 - 12:28pm

Radio Amateurs in Canada — primarily in the Province of Quebec — have mounted a petition drive demanding that members of the House of Commons prompt decisive regulatory action against a Quebec resident who has been causing deliberate interference. The petition does not spell out the particulars of the allegations but says the alleged offender — apparently unlicensed — is already known to authorities. Petitioners claim that the individual’s “malicious intentions” have been “threatening the security of emergency radio communication in the province,” and they called upon Parliamentary lawmakers “to ensure the security” of HF radio communication.

“For 2 years, a Nicolet resident, near Trois-Rivières [Quebec], illegally set up a transmitting radio station and is generating interference on purpose,” the petition recounts. “Amateur Radio operators in Quebec have identified the illegal radio station and brought it to the attention of Innovation, Science and Economic Development (ISED) Canada, and its inspectors seized the individual’s radio equipment.” One of ISED’s functions is telecommunications regulation.

According to the petition, the alleged offender “acquired new equipment right away and returned to jamming the airwaves.” The petition identifies the alleged offender as a male who is “known to police in Nicolet and Trois-Rivières” and “has regular encounters with the law.”

“We are calling on the government to provide more support to the Department of Innovation, Science and Economic Development Canada, so that it can intervene more decisively in this matter,” the petition declared.

Radio Amateurs of Canada (RAC) — the country’s national Amateur Radio organization — was noncommittal. “While we have not had a chance to investigate the specific details of the incidents [that] the petition refers to, we agree with the importance of acting to support the security of high frequency communications,” RAC said this week.

As of June 12, the online petition had gathered more than 625 signatures, primarily from Quebec and Ontario. Canada has more than 50,000 Amateur Radio license

Source:ARRL

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