Tag Archives: Arnie Coro

Silent Key: Arnaldo “Arnie” Coro Antich (CO2KK), of Radio Havana Cuba, has passed away

Many thanks to SWLing Post contributor, Richard Langley, who shares this sad news via Horacio A. Nigro (CX3BZ):

Arnie Coro and family circa 2016 (Photo via QRZ.com)

Arnaldo Coro Antich (CO2KK) Passed Away This Morning At 80 Years Old

This morning of January 8, 2023, our colleague Arnaldo de Jesús Coro Antich (CO2KK) died in a hospital in the capital at the age of 80 due to complications from chronic illnesses he suffered.
Coro began his interest in the radio, according to what he said, from the gift of his father, a coil with a galena stone and headphones to listen to the stations. At just 12 years old, he joined the then Radio Club de Cuba, the association that at the end of the 50s brought together radio amateurs in the capital.

In 1957 he began working at CMBA Television Canal 7, owned by the Mestre brothers, where he gained a lot of knowledge.

As a journalist, he collaborated with the written press and with the radio, his greatest passion. The first one recalls his sec? tion on science in Juventud Rebelde newspaper and the articles in the magazine Juventud Técnica in which he was also one of the advisors. On the radio he was until his death a member of the team of the Radio Habana Cuba radio station and his program Dxers Unlimited, in English, which reached all corners of the planet, was highly appreciated, from where he re? ceived abundant correspondence. Many foreign colleagues knew him as Arnie Coro. He also had sections on science and technology in programs on Radio Progreso, Radio Taino and Radio Metropolitana.

Arnaldo was passionate about the dissemination of science and technology and was always aware of the latest discovery or invention to pass it on to listeners and friends.
As a professor, he also taught classes at the “Raúl Roa Kourí” Higher Institute of International Relations and at the “José Martí” International Institute of Journalism. But his teachings were not limited to the teaching scenarios, he constantly trans? mitted them to everyone.
Since its foundation in 1966, he was a member of the Cuban Radio Amateurs Federation, and an active member in technical commissions and other positions, always looking for solutions to technical problems. He founded and kept the “Rueda del Multimetro” (Net of multimeter) on the air for a long time, in which he helped to understand the technical issues of radio am? ateurs and to find solutions to the problems that numerous colleagues from the backyard and abroad consulted him.

He was an active contributor to other rounds such as the “Rueda Huracan” (Hurrican Net) and the “Encuentro Capitalino” (Capital Meeting) where he made available his knowledge about solar activity and propagation, one of his favorite topics and of which he was a true connoisseur.

Another subject to which he dedicated special interest, time and efforts was that of emergency communications by radio amateurs. His radio station was always ready to seek and share information during emergencies and disasters in our country and the region. At the time of his death he was the Emergency Coordinator for Area C of Region 2 of the International Amateur Radio Union (IARU R2).

I will always appreciate our exchanges by radio or phone about extreme weather events threatening our area. Coro, who was born on July 2, 1942, received the National Radio Award in 2017.

We offer our condolences to his family on his death.

Rest in peace, friend. We will miss you.

Carlos Alberto Santamaría González (CO2JC)
Coordinador de la Red de Emergencia Nacional FRC
Horacio A. Nigro, CX3BZ

The following statement was posted on the RHC website:

Prominent Cuban journalist and professor Arnaldo Coro Antích passes away

Havana, January 8 (RHC)– In the early hours of this Sunday morning, the outstanding journalist and university professor Arnaldo (Arnie) Coro Antich, with a long working career in Cuban radio, passed away in Havana.

Winner of the National Radio Award 2017, Coro was born on July 2, 1942. From a very young age, he was linked to radio broadcasting. He was an expert radio amateur (his call sign: CO2KK) and a specialist in Mass Media and New Information and Communications Technologies.

He taught as Assistant Professor at the Higher Institute of International Relations of MINREX and served as Vice President of the Cuban Commission for the Preservation of Audiovisual Heritage, created by UNESCO.

Arnie Coro was the author of numerous scientific and technical publications, including the book “La Guerra Radial de Los Estados Unidos de América Contra Cuba,” published in 1984.

He was the host of the internationally-renowned radio program “Dxers Unlimited,” which he kept on-the-air for many years on the English-language broadcasts of Radio Havana Cuba. “Dxers Unlimited” was one of the most popular radio programs in English and was considered a profesional guide to shortwave listening around the world.

Arnie’s last working years were spent in Radio Habana Cuba’s English language service, a group that regrets his death and sends its condolences to his family and friends.

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Bob’s 1961 Radio Havana Cuba QSL Card and full text from DXers Unlimited on 55th anniversary


Many thanks to SWLing Post reader, Bob La Rose, who shares a QSL he received (see above and below) from Radio Havana Cuba after they had only been on the air a few days back in 1961.

RHC Letter 16May61

Amazing, Bob!  Thanks for taking the time to scan and share this report!

Also, many thanks to Arnie Coro, Host of Dxers Unlimited at Radio Havana Cuba, for sharing the full text/script from his May 1st 2016 anniversary edition of DXers Unlimited:

Radio Havana Cuba
Dxers Unlimited
Dxers Unlimited’s weekend edition for 1 May 2016
By Arnie Coro
Radio amateur CO2KK

Hi amigos radioaficionados, welcome to the weekend edition of Dxers  Unlimited,  today l am happy to celebrate with you all the 55th Anniversary of Radio Havana Cuba… Yes amigos, it was on the first day of May of 1961, during the May Day celebrations when Cuba had just won the battle against the mercenary invasion that we went on the air using our present name Radio Havana Cuba… Two announcers, Orlando Castellanos and Fernando Alcorta announced to the world that Radio Havana Cuba, was on the air… Previously we had used the name Cuban Experimental Short Wave, but from May one of 1961, we are known worldwide as Radio Havana Cuba…

So today is a very special day… remembering those who have passed away after many years of valuable services to our station, like Pedro Costa the General Administration Manager, Carlos Estrada our Chief Engineer, and former Director Generals Marcos Behamaras. Orlando Fundora, Jose Antonio Caiñas and Alfredo Viñas. I also keep very nice memories of Angel Hernandez our bilingual announcer with the most effective voice for short wave radio that I can recall, and also I remember Manolo Ortega, reading our Spanish language editorials so that they could be heard clearly through his powerful voice…

Si amigos, I was there at the station 55 years ago as a young radio technician in charge of supervising the operations of our studios and transmitters that at that time included four Brown Boveri Swiss made short wave transmitters connected to a still under construction antennas farm, and the two studios borrowed from Radio Progreso until we could finish building our first studios .

The history of Radio Havana Cuba is full of very relevant moments, like the day that our Experimental Station announced to the world that the mercenary invasion that entered the Bay of Pigs had been defeated after sixty six hours of fierce combats .

With a lot of enthusiast and the impacting presence of a new generation of announcers, journalists , technicians, engineers and support personnel we are moving ahead to provide the best possible programming keeping our short wave transmitting facilities because we do believe on the use of international short wave broadcasting, while not disregarding the feeding of streaming audio to the Internet-

I am Arnie Coro, your host here at this special 55th Anniversary edition of Dxers Unlimited, that will continue in just a few seconds after a station ID..

Musical short cut

Yes amigos this is Radio Havana Cuba, using short wave frequencies at different times of the day on the 16, 19, 22, 25 ,31, 49 and 60 meters bands… and now our next radio hobby related item, a very popular section of this show under the name   Antenna Topics , that is dedicated today , at the request of several listeners to a very effective Dxing antenna, low take off angle radiator, known as the HENTENNA, A great number of listeners  from all around the world  have written to me recently, asking to learn more about  this Japanese  antenna design , known as the HENTENNA, that seems to continue to be making headlines in radio publications around the  world once again… But before telling you more about the mysterious HENTENNA…. A solar activity update… believe it or not, we are seen the solar flux moving up to very near 100 units for the first time in many weeks… following the typical ups and downs of the tail end of solar cycle 24… so  propagation conditions have improved on the short wave bands …. Now back to the HENTENNA…

By the way, the first original report about the HENTENNA that went on the air  here at Dxers Unlimited, dates back to  1999,more precisely, it went on the air the 12th of October of 1999, and  according to my records, it  then generated a lot of interest from our listeners, who were at that time, 1999, getting ready to enjoy the peak  years of solar dream solar cycle 23 !!! >Never as powerful as super cycle 19, but nevertheless much better than the present very poor cycle 24.

So amigos here is  at the request of Dxers Unlimited’s fans , a special Dxers Unlimited’s report on the HENTENNA, the Japanese elongated  rectangular loop antenna with an easy  match to coaxial cable feedlines of any impedance, be it 50, 60 ,75 or  93 ohms…or even 150 ohms !!! Of course that you can feed it with parallel transmission line of 300 to 450 ohms too, it is just a matter of minutes to find the perfect match for the feedline in use.

Let me start by saying that  I recently built yet another HENTENNA for the FM broadcast band, and it  is working nicely, having already picked up some Sporadic E skip DX stations from Mexico, the US and Puerto Rico during first few days of this year’s spring and summer  E skip season.

Now you will have to learn something very unusual about the HENTENNA…  the HENTENNA produces or receives VERTICALLY  polarized waves when the antenna is placed horizontally; that is, with  the long sides of the rectangular loop parallel to the ground. AND, if you want horizontal polarization, just flip the HENTENNA so that the long sides  of the loop are vertical, and the short sides are parallel to the  ground, something that is puzzling, but that’s the way it is amigos…

By the way, one of the world’s foremost antenna experts, Dr. L. B.  Cebik, amateur radio operator W4RNL, did during his fruitful life an extensive analysis of  elongated loops, and his findings are really fascinating. Dr. Cebik , now sorrily a silent key specialized in computer modeling of complex antenna systems, and his work with the HENTENNA and other similar elongated loops shows that the  HENTENNA is a very good performer indeed.

In a few seconds, be ready to write down, the formulas for calculating HENTENNAS  in the frequency range from 14 megaHertz all the way up to 220 megaHertz.

And now, as promised  more about the japanese wonder antenna… the  HENTENNA. Dr. Cebik’s computer modeling shows that the elongated loop HENTENNA has an edge over a regular square one  wavelength loop and the regular elongated loop.

HENTENNAS for receiving FM broadcast signals are very easy to build,  using a wooden or PVC pipe frame and copper wire. I built the one just
mentioned cut for 100 megaHertz, using PVC insulated no. 12 wire, the  one that is typically used for home wiring.

The loop was closed by soldering with a butane torch, and using regular  solder with rosin core… The reason for using the butane torch is that no soldering iron at hand here could handle the heavy wire PLUS the high  speed heat transfer of the copper wire.

The loop for the 100 megaHertz antenna is 1.5 meters on the long sides of the rectangle and 50 centimeters on the short sides. The feed point  for the 50 ohm cable is was found to be  located about 55 centimeters from one of the  short sides of the loop.

The antenna is installed with the long sides in a vertical position; for receiving horizontally polarized FM broadcasts. I tried both 50 ohms and  75 ohms coaxial cables, and could not detect any difference on the  weakest station that I am picking up here regularly with the FM band HENTENNA.

Again, now please pay extra attention …if you want to make of these elongated loops for receiving, here  are the measurements to use: for the long sides of the rectangle 1/2 of  a wavelength at the operating frequency, for the short side, the length  is 1/6 of a wavelength… and the connection point for the coaxial cable  of 50 ohms impedance is a little more than 1/6 of wavelength from one of the short sides of the rectangle, and it must be found experimentally by locating the point that provides the minimum standing wave ratio.

HENTENNAS can be built for any frequency between 10 megaHertz and 300
megaHertz by using heavy WIRE, and for the frequency range from about 50  megaHertz to 500 megaHertz you may try building HENTENNAS with copper or  aluminum tubing.

Hope to have you all listening to my middle of the week edition of Dxers Unlimited amigos and do enjoy the improved short wave propagation conditions now in progress, especially after your local sunset. 

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Starting tonight, Radio Progreso on shortwave

Radio-Progreso-CubaAccording to Arnie Coro at Radio Havana Cuba, the Cuban medium wave broadcaster Radio Progreso will begin an “experimental” shortwave broadcast on 4,765 kHz from 00:30 till 04:00 UTC on October 1st, 2013. For those of us living in North America, this broadcast will begin at 08:30 PM EDT tonight.

I will attempt to listen and record the broadcast tonight.

Many thanks to David Goren for the tip and for Bryan Mangawhai’s original report to DX lists.

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Shortwave Radio Recordings: Radio Havana Cuba’s DXers Unlimited

ArnieCoroDXersUnlimitedIf you live in the Americas and you regularly listen to a shortwave radio, you have no doubt heard Radio Havana Cuba across the shortwave spectrum. When I travel in North or Central America, I can easily hear RHC, often without even extending the telescopic antenna on my portable.

A long-running program on RHC’s English hour is Arnie Coro’s DXers Unlimited.

Tuesday night, I recorded the DXers Unlimited segment from RHC’s The English Hour on 6 MHz, and offer it here for your listening pleasure.  If the recording doesn’t sound typical of shortwave radio, it’s because: a) RHC’s signal is exceptionally strong into North America, and b) I recorded this with an AM filter 24 kHz wide.  In other words, I widened my DSP filter to match RHC’s bandwidth on my spectrum display–and to put this in perspective, I regularly record between 7-9 kHz wide. (This results in the crisp, high-fidelity audio you hear in this recording, though unfortunately at the compromise of any adjacent stations abiding by HF broadcasting etiquette.)

You can download the MP3 directly by clicking here, or simply listen in the embedded player below:

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