Monthly Archives: April 2024

Replacement power supplies for WJ-8711A/HF-1000A series receivers

Photo by Paolo Viappiani

Many thanks to SWLing Post contributor, Dean Bianco, who writes:

Inspired by Chuck Yarbrough ‘s YouTube video, I ordered one of the newly-manufactured replacement power supplies for the WJ-8711A/HF-1000A series from WJ Systems, a new company run by noted WJ master technician Stephen Pappin. For those of us who own one (or more) of the dozen or so variants of these now-classic early DSP receivers, these new PS’s can provide an extension of their useful lifespans. These units are direct substitutions for the flawed Condor switching supplies, the Achilles heel of an otherwise fine general coverage radio. Nearly all of the original Condors have lived past their useful, in-spec lifespans and have become (or soon to become) malfunctioning ticking time bombs that will summarily go off the rails (pun intended) and spike all kinds of nasty voltages that will destroy your pricey beauty forever. While admittedly there are other inevitable EOL issues endemic to the 87xx series, e.g., expired time-keeping battery RAM and aging encoders making it harder to find spare parts, a well-cared for receiver can enjoy a much-welcomed rejuvenation and keep the grim reaper of radios at bay for a while!

The official website for WJ Systems is: www.wj-systems.com

Chuck Yarbrough’s YouTube videos demonstrating the installation and testing of the new power supply:

Part 1 of 2:

Part 2 of 2

Thanks!

Dean

Thank you for sharing this, Dean! This is a brilliant upgrade for an iconic receiver!

Spread the radio love

Video: Building Bethany – VOA’s First High-Power International Broadcast Station

1 Reply

Many thanks to the National VOA Museum of Broadcasting for posting the following video on their YouTube channel:

Click here to view on YouTube.

Spread the radio love

We’re a garage band, we come from garageland

2 Replies

Hi, FastRadioBurst 23 here letting you know of a couple of our shows this week. On Sunday 28th April 2024 at 0900/1300 hrs UTC on 6160 kHz and then at 2000 UTC on 6160 kHz and 3975 kHz we have The Shortwave Garage Sale beamed to Europe via Shortwave Gold. Pull open that garage door, crank up your shortwave radio to 11 and enjoy our rousing Garage and Psyche special. Why not even get into some overalls and lie down on one of those mechanic’s creeper things and really get into the garage vibe!

On our new day of Wednesday 1st May 2024 via the services of WRMI we bring you another episode of WMMR – Mystery Mix Radio at 0200 UTC on 9395 kHz. Who knows what DJ Frederick will play but we promise you it’ll be interesting and fun.

We are still looking for some financial help to cover our production and transmission costs for our shows on shortwave so here’s our fundraising video below. We’d love to keep our show on the air for the rest of the year and we are looking for donations (no matter how small as everything helps) to keep our shows bouncing off that ionosphere. Remember, radio connects us all!

For more information on the shows please email [email protected] and check out our old shows here.

Spread the radio love

MFJ ceases on-site production in Starkville, Mississippi

25 Replies

Many thanks to a number of readers who’ve sent me the following email announcement (that I unfortunately) also received today from Martin Jue at MFJ Enterprises:

Heavy Sad Heart

Dear Fellow Hams and Friends,
April 25, 2024
Dear Fellow Hams and Friends,

It is with a sad heart as I write this letter.

As many of you have heard by now, MFJ is ceasing its on-site production in Starkville, Mississippi on May 17, 2024. This is also the same for our sister companies’ Ameritron, Hygain, Cushcraft, Mirage and Vectronics.

Times have changed since I started this business 52 years ago. Our product line grew and grew and prospered. Covid changed everything in businesses including ours. It was the hardest hit that we have ever had and we never fully recovered.

I turned 80 this year. I had never really considered retirement but life is so short and my time with my family is so precious.

I want to thank all of our employees who have helped build this company with me over the years. We have many employees who have made MFJ their career for 10, 20, 30, 40 and more years.

We are going to continue to sell MFJ products past May 17, 2024. We have a lot of stock on hand. We will continue to offer repair service work for out-of-warranty and in-warranty units for the foreseeable future.

Finally, a special thanks to all of our customers and our dealers who have made MFJ a worldwide name and a profitable business for so many years. You all are so much appreciated.

Sincerely Yours, 73s

Martin F. Jue, K5FLU

Spread the radio love

May 2024: From the Isle of Music and Uncle Bill’s Melting Pot

From the Isle of Music, May 11, 2024 Broadcast:

The main feature will be special guest Kiki Valera with some of his new son cubano album “Vacilón Santiaguero”.
Broadcast times: May 11: 0900-1000 UTC 9670 kHz &
1900-2000 UTC 3955 and 6070 kHz

Uncle Bill’s Melting Pot, May 18, 2024 Broadcast:

The main feature will be special guest Eugene Pao, Hong Kong’s foremost jazz guitarist, with some of his new album “Jazz at Lincoln Center”, recorded live during a tour of the US.
Broadcast times: May 18 0900-1000 UTC 9670 kHz &
1900-2000 UTC 3955 and 6070 kHz

Both programs will feature additional music to round out the hour.
It’s great to be back on Channel 292!

Spread the radio love

Carlos’ Shortwave Art and recording of the Voice of Korea (April 23, 2024)

Radio Waves: HEBA Antenna Approval, Eclipse Time Signal Shift, A Novice’s Guide to Amateur Radio Astronomy, and Voyager 1 Sending Data Again!

3 Replies

Radio Waves: Stories Making Waves in the World of Radio

Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!

Many thanks to SWLing Post contributors Alan, Dan, and Rich Cuff for the following tips:

WQVR(AM) Is Granted CP to Use HEBA Antenna at Night (Radio World)

Developer believes antenna’s smaller footprint can help reduce property needed for AM operators

The FCC in March granted an application for a construction permit filed by WQVR(AM) 940 in Webster, Mass., requesting licensed nighttime operation.

This is noteworthy because WQVR has been licensed to operate during daytime hours with a High-Efficiency Broadband Antenna or HEBA, developed by Worldwide Antenna Systems. [Continue reading…]

Global ‘time signals’ subtly shifted as the total solar eclipse reshaped Earth’s upper atmosphere, new data shows (Live Science)

During the historic April 8 total solar eclipse, a government radio station in Colorado started sending out slightly shifted “time signals” to millions of people across the globe as the moon’s shadow altered the upper layers of our atmosphere. However, these altered signals did not actually change the time. [Continue reading…]

Nathan Butts: A Novice’s Guide to Radio Astronomy (YouTube)

NASA’s Voyager 1 Resumes Sending Engineering Updates to Earth (NASA JPL)

An artist’s concept of NASA’s Voyager spacecraft. Credit: NASA

After some inventive sleuthing, the mission team can — for the first time in five months — check the health and status of the most distant human-made object in existence.

For the first time since November, NASA’s Voyager 1 spacecraft is returning usable data about the health and status of its onboard engineering systems. The next step is to enable the spacecraft to begin returning science data again. The probe and its twin, Voyager 2, are the only spacecraft to ever fly in interstellar space (the space between stars).

Voyager 1 stopped sending readable science and engineering data back to Earth on Nov. 14, 2023, even though mission controllers could tell the spacecraft was still receiving their commands and otherwise operating normally. In March, the Voyager engineering team at NASA’s Jet Propulsion Laboratory in Southern California confirmed that the issue was tied to one of the spacecraft’s three onboard computers, called the flight data subsystem (FDS). The FDS is responsible for packaging the science and engineering data before it’s sent to Earth.

The team discovered that a single chip responsible for storing a portion of the FDS memory — including some of the FDS computer’s software code — isn’t working. The loss of that code rendered the science and engineering data unusable. Unable to repair the chip, the team decided to place the affected code elsewhere in the FDS memory. But no single location is large enough to hold the section of code in its entirety.

So they devised a plan to divide the affected code into sections and store those sections in different places in the FDS. To make this plan work, they also needed to adjust those code sections to ensure, for example, that they all still function as a whole. Any references to the location of that code in other parts of the FDS memory needed to be updated as well.

The team started by singling out the code responsible for packaging the spacecraft’s engineering data. They sent it to its new location in the FDS memory on April 18. A radio signal takes about 22 ½ hours to reach Voyager 1, which is over 15 billion miles (24 billion kilometers) from Earth, and another 22 ½ hours for a signal to come back to Earth. When the mission flight team heard back from the spacecraft on April 20, they saw that the modification worked: For the first time in five months, they have been able to check the health and status of the spacecraft.

During the coming weeks, the team will relocate and adjust the other affected portions of the FDS software. These include the portions that will start returning science data.

Voyager 2 continues to operate normally. Launched over 46 years ago, the twin Voyager spacecraft are the longest-running and most distant spacecraft in history. Before the start of their interstellar exploration, both probes flew by Saturn and Jupiter, and Voyager 2 flew by Uranus and Neptune.

Caltech in Pasadena, California, manages JPL for NASA.