Robust Ham Radio Digital Voice


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Page last updated on: Monday, November 24, 2014

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Robust Ham Radio Digital Voice

In his blog David Rowe VK5DGR describes his work on increasing the robustness of FreeDV over HF radio channels, in particular compared to analog SSB

He says HF radio channels are bad news for digital data so he has been trying a dramatically reduced bit rate of just 450 bps and coherent QPSK instead of differential QPSK.

Read the blog at

http://www.rowetel.com/blog/?p=3700

FreeDV

http://freedv.org/

via Robust Ham Radio Digital Voice

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Interesting article from experimenter David Rowe (VK5DGR).  Rowe is trying to improve what he calls the “robustness” of Free DV over HF radio.  To do this, Rowe is dropping the bit rate to 450 bps and employing Coherent QPSK rather than Differential QPSK.  His research is promising.  Rowe supplies a link to his blog where his experiments are recorded.  A little complex in places, but mostly understandable to math-phobics such as I.

For the latest Amateur Radio news and events, please check out the blog sidebars.  These news feeds are updated daily.

Aloha es 73 de Russ (KH6JRM).

Celebrating the ARRL’s centennial year


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Page last updated on: Monday, November 24, 2014

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Celebrating the ARRL’s centennial year

From 26 November to 2nd December 2014 look for the following stations to be active to celebrate ARRL’s centennial year:

W1AW/3 will be operated by Karl N8NA, located in Wilmington, New Castle County, State of Delaware.

W1AW/5 will be operated by Scott W5WZ, located in Calhoun, Ouachita County, State of Louisiana.

W1AW/KP4 will be operated by Felipe NP4Z, located in San Juan, Puerto Rico.

QSLs preferred via LoTW

via Celebrating the ARRL’s centennial year.

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W1AW will be transitioning to three new suffixes for the latter portion of the 2014 Centennial year.  W1AW will be operating from Louisiana, Delaware, and the Commonwealth of Puerto Rico between 26 November 2014 and 02 December 2014.  The W1AW portable operation is part of the ARRL Centennial QSO Party.

For the latest Amateur Radio news and events, please check out the blog sidebars.  These news feeds are updated daily.

Aloha es 73 de Russ (KH6JRM).

DXCC Country/Entity Report


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Page last updated on: Sunday, November 23, 2014

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DXCC Country/Entity Report

According to the Amateur Radio Cluster Network for the week of Sunday, 16th-November, through Sunday, 23rd-November there were 217 countries active.

Countries available:

3A, 3B8, 3B9, 3D2, 3DA, 3W, 4J, 4L, 4O, 4S, 4U1I, 4X, 5A, 5B, 5H, 5N, 5R, 5T, 5W, 5X, 6W, 6Y, 7X, 8P, 8R, 9A, 9H, 9J, 9K, 9M2, 9M6, 9N, 9V, 9Y,

A2, A4, A6, A7, A9, AP, BV, BY, C3, C5, C6, C9, CE, CE9, CM, CN, CP, CT, CT3, CU, CX, D2, D4, DL, DU, E5/s, E7, EA, EA6, EA8, EA9, EI, EK, EL, EP, ER, ES, ET, EU, EX, EY, EZ, F, FG, FK, FM, FO, FR, FS, FW, FY, G, GD, GI, GJ, GM, GU, GW, HA, HB, HB0, HC, HC8, HH, HI, HK, HK0/a, HL, HP, HR, HS, HV, HZ, I, IS, J2, J3, J6, J7, JA, JD/o, JT, JW, JY,

K, KG4, KH0, KH2, KH6, KL, KP2, KP4, LA, LU, LX, LY, LZ, OA, OD, OE, OH, OK, OM, ON, OX, OY, OZ, P2, P4, PA, PJ2, PJ4, PJ7, PY, PY0F, PZ, S0, S2, S5, S7, S9, SM, SP, SU, SV, SV/a, SV5, SV9, T32, T5, T7, T8, TA, TF, TG, TI, TJ, TK, TR, UA, UA2, UA9, UK, UN, UR,

V3, V4, V5, V6, V7, V8, VE, VK, VP2E, VP2V, VP8, VP9, VR, VU, VU4, XE, XT, XU, YA, YB, YI, YJ, YL, YN, YO, YS, YU, YV, Z2, Z3, ZA, ZB, ZD7, ZD8, ZF, ZL, ZP, ZS

PLEASE NOTE: The report “could” contain “Pirate/SLIM” operations or more likely a “BUSTED CALLSIGN”. As always, you never know – “Work First Worry Later” (WFWL).

OPDX

via DXCC Country/Entity Report.

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According to the Amateur Radio Cluster report, there were 217 DXCC Countries or Entities on the list for the week of 16 – 23 November 2014.  This list is useful for those pursuing the DXCC Certificate from the ARRL.

For the latest Amateur Radio news and events, please check out the blog sidebars.  These news feeds are update daily.

Aloha es 73 de Russ (KH6JRM).

An amateur radio operator WAS the first hacker – KB6NU’s Ham Radio Blog


An amateur radio operator WAS the first hacker.  November 25, 2014 by dan kb6nu. I’ve often maintained that amateur radio operators were the first hackers. Now, I have some supporting evidence.As reported in this post on the Royal Institution website, a public demonstration of Marconi’s wireless communication system, aka radio, was hacked by a British magician. Apparently, Marconi was touting his system as not only being able to send messages over long distances, but as also being secure. Well, now we know that radio transmissions are anything but secure, but they didn’t know that back in 1903. So, when a public demonstration was set up at Great Britain’s Royal Institution, a British magician and inventor, Nevil Maskelyne, was hired to “hack” into the demo. Before Marconi could send his message from his Cornwall station to the receiving station set up at the Royal Institution, Maskelyne sent the message, “RATS RATS RATS from his transmitting station, presumably somewhere near the Royal Institution. This was picked up by the receiving station, thereby demonstrating that Marconi’s wireless system was anything but secure. So there you have it: an amateur radio operators was indeed the first “hacker.”Thanks to Phil, M0WGZ for posting this link to the AMRAD mailing list.Take a look at these related posts:From the trade magazines: Hacker boards, CubeSats, resistorsIs it easier now to be a hacker / experimenter…

via An amateur radio operator WAS the first hacker – KB6NU’s Ham Radio Blog.

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Fascinating article relayed by Dan Romanchik (KB6NU) from Phil (M0WGZ), who published this historical oddity on the AMRAD mailing list.  Apparently, Marconi’s radio system was not as secure as he promised.  ‘Seems English inventor and magician Nevell Makselyne was hired to break into Marconi’s radio demonstration to disprove some of Marconi’s claims. Makselye was successful, something Dan feels makes Amateur Radio operators the first hackers of the 20th Century.

For the latest Amateur Radio news and events, please check out the blog sidebars.  These news feeds are updated daily.

Aloha es 73 de Russ (KH6JRM).

W1AW Centennial Operations Moving to Delaware, Louisiana, and Puerto Rico


W1AW Centennial Operations Moving to Delaware, Louisiana, and Puerto Rico

TAGS: 50 states, appointees, Arkansas, ARRL Centennial QSO, ARRL Centennial W1AW, arrl members, Centennial QSO Party, Connecticut, evening, Florida, hq staff, leader boards, Logbook, lotw, Louisiana, participants, place, plaque, portable operations, puerto rico, QSO Party leader, QSO Party points, time zones, utc, W1AW Award, Wednesday, work W1AW, Working W1AW/x, year-long operating event

11/24/2014

The ARRL Centennial W1AW portable operations taking place throughout 2014 from each of the 50 states are now in Florida and Arkansas. They will transition at 0000 UTC on Wednesday, November 26 (the evening of November 25 in US time zones), to Delaware (W1AW/3), Louisiana (W1AW/5), and Puerto Rico (W1AW/KP4). So far during 2014, W1AW has visited each of the 50 states for at least 1 week, and by year’s end W1AW will have been on the air from every state at least twice.

The ARRL Centennial QSO Party kicked off January 1 for a year-long operating event in which participants can accumulate points and win awards. The event is open to all, although only ARRL members and appointees, elected officials, HQ staff and W1AW are worth ARRL Centennial QSO Party points.

Working W1AW/x from each state is worth 5 points per mode/contact, even when working the same state during its second week of activity.

To earn the “Worked all States with W1AW Award,” work W1AW operating portable from all 50 states. (Working W1AW or W100AW in Connecticut does not count for Connecticut. Participants must work W1AW/1 in Connecticut.) A W1AW WAS certificate and plaque will be available.

An ARRL Centennial QSO Party leader board shows participants how many points they have accumulated in the Centennial QSO Party and in the W1AW WAS operations. Log in using your Logbook of The World (LoTW) user name and password, and your position will appear at the top of the leader boards. Results are updated daily, based on contacts entered into LoTW.

 

via W1AW Centennial Operations Moving to Delaware, Louisiana, and Puerto Rico.

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The final push for the ARRL Centennial Award is underway, with W1AW Centennial stations shifting to Delaware (W1AW/3), Louisiana (W1AW/5), and Puerto Rico (W1AW/KP4), beginning 0000 UTC, 26 November 2014. The event is part of a year-long ARRL Centennial QSO Party, which began on 01 January 2014.  Results and standings are being posted daily to The Logbook of The World (LoTW).  Good luck!

For the latest Amateur Radio News and Events, please check out the blog sidebars.  These news feeds are updated daily.

Aloha es 73 de Russ (KH6JRM).

ARRL Headquarters Will Be Closed on November 27-28


ARRL Headquarters Will Be Closed on November 27-28

TAGS: arrl audio news, arrl headquarters, arrl letter, edition, enjoyable holiday, Friday, thanksgiving holiday, Thursday

11/24/2014

ARRL Headquarters will be closed for the Thanksgiving holiday on Thursday and Friday, November 27-28. The ARRL Letter will not be published on Thanksgiving Day, Thursday, November 27, and there will be no edition of ARRL Audio News on Friday, November 28.

We wish everyone a safe and enjoyable holiday!

 

via ARRL Headquarters Will Be Closed on November 27-28.

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ARRL Headquarters in Newington, Connecticut will be closed Thursday and Friday in observance of the Thanksgiving Day Holiday.

For the latest in Amateur Radio news and events, please check out the blog sidebars.  These news feeds are update daily.

Aloha es 73 de Russ (KH6JRM).

Astronaut Samantha Cristoforetti, IZ0UDF, Two Others Arrive at ISS


Astronaut Samantha Cristoforetti, IZ0UDF, Two Others Arrive at ISS

TAGS: Alexander Samokutyaev, amateur radio licensee, astronaut Samantha Cristoforetti, Baikonur Cosmodrome, Expedition, international space station, Italy, Kazakhstan, monday morning, nasa, radio amateurs, Soyuz spacecraft, Sunday night, twitter

11/24/2014

The International Space Station one again has an Amateur Radio licensee onboard — European Space Agency Astronaut Samantha Cristoforetti, IZ0UDF. She was part of a three-member ISS crew increment that launched in a Soyuz spacecraft launched from Baikonur Cosmodrome in Kazakhstan Sunday night and safely docked with the ISS Monday morning. Cristoforetti is Italy’s first female space traveler. With her on the Soyuz were Russian Cosmonaut Anton Shkaplerov and NASA Astronaut Terry Virts. All three are part of the Station’s Expedition 42/43 crew.

Welcoming the trio to the space station were ISS Commander Barry Wilmore and Cosmonauts Yelena Serova and Alexander Samokutyaev. Cristoforetti is a former fighter pilot.

Since Alexander Gerst, KF5ONO, and Reid Wiseman, KF5LKT, returned to Earth on November 10, the ISS has been left without any radio amateurs onboard. Cristoforetti will spend about 6 months in space. Follow Samantha Cristoforetti on Twitter.

via Astronaut Samantha Cristoforetti, IZ0UDF, Two Others Arrive at ISS.

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Amateur Radio has returned to the International Space Station (ISS).  Astronaut Samantha Cristoforetti (IZ0UDF) joined two other space travelers following a successful launch from the Baikonur Cosmodrome.  Cristoforetti is a former fighter pilot and is the first female Italian astronaut to reach the ISS.  She will be on the ISS for about 6 months.

For the latest Amateur Radio news and events, please check out the blog sidebars.  These news feeds are updated daily.

Aloha es 73 de Russ (KH6JRM).

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