Category Archives: Guest Posts

Guest Post: Roland Raven-Hart’s reception of a U.S. broadcaster in South America made headlines in 1923

Many thanks to SWLing Post contributor, Horacio Nigro (CX3BZ) who shares the following guest post which was originally published in his blog “La Galena del Sur” (in Spanish). Horacio recently translated his article into English for us:

1923: The first reception of a U.S. broadcaster in South America.

by Horacio A. Nigro, CX3BZ,
Montevideo, Uruguay, “La Galena del Sur”

On the night of October 30-31, 1923, Engineer Roland Raven-Hart, a British Army Major located in the Andes mountains on the Argentina-Chile frontier, heard a U.S. broadcast station (and thus an overseas station) for the first time in South America, an event that made the headlines in the specialized press of that time.

It was the first time that the famous KDKA, Pittsburgh, USA, was heard in South America.

Major Roland Raven-Hart was born in Glenalla, Ireland. He was trained as an engineer, and at the outbreak of World War I he enlisted in the the British Army. He was assigned to the General Staff, and served on sensitive missions in France, Belgium, Russia, Italy, Palestine, Sudan, Syria, Egypt, etc. At one point he installed an antenna on one of the pyramids of Egypt that allowed him to quickly communicate with the staff.

Ing. Roland Raven-Hart. (1889-1971). Major of the British Army. He was member of the Institute of Radio Engineers and the American Institute of Electric Engineers.

As a consequence of his outstanding performance, several allied governments gave him merit awards, such as Officer of the Order of the British Empire, Croix de Guerre from France, Order of St. Stanislaus of Russia, etc.

When peace was restored, and with the rank of major, he asked to be released to travel for rest and study in Buenos Aires, Argentina, where the Pacific Railroad Administration allowed him to study wireless. This continued after the Trans-Andean railway arrived in the mountain village of Los Andes, where he had installed his famous amateur radio station 9TC.

He had good DX, and on this date, achieved a distance record for broadcast reception between North and South.

In fact, the Argentinian “Revista Telegráfica”, a magazine edited in Buenos Aires, Argentina, reported the following news in its October 1923 edition:

REMARKABLE RECORD

At press time, we get the following report. The news could not be more sensational. It has been possible to receive a North American broadcasting station at a distance of approximately 8,300 kilometers!.

It is an event that marks a new era in our modern history of radio. Using the pseudonym “John English” is a distinguished engineer who deserves our absolute faith.

Indeed, “John English”, pseudonym of Roland Raven-Hart, reported:

Radiotelephony up to 8,300 kilometers. – Reception tests in Los Andes (Chile) and Puente del Inca (Mendoza). – Interesting observations.

In Los Andes (Chile) on the night of October 30-31 I received a complete program from a station announcing as “KDKA – Pittsburg ‘classical music, jazz and comedy, all in English. I think this must be a record, being a distance of more or less 8,300 kilometers.

The apparatus used is a “Western Electric”, with a high [frequency] amplification, detector and low [frequency]amplification, with a phone of the same brand.

The antenna was 20 meters long and 5 meters high on a zinc roof”.

He does not mention the frequency or wavelength. The Westinghouse station was operating on the frequency of 920 kHz at that time , but it is also likely that he received it on shortwave via station 8XS, which began simulcasting KDKA mediumwave in July 1923 on the 60 meter band.

KDKA

Raven-Hart was enjoying reception at the time, but from local stations:

During the month of October I have heard the following stations, and will have much pleasure in giving news about the reception quality, etc. My address for letters: Supte. [abreviation of Super Intendent], Telégrafos F. C. T. Los Andes (Chile).

Buenos Aires ……. Radio Cultura, Radio Sud América

Montevideo ……… Paradizábal, R. Sudamérica

Tucumán ………….. Radio Club, San Pablo, « R. P. F. »

Rosario ……………. Radio Club

San Juan ………….. “340” , Pekam

Villa Maria ………… Radio Coen .

Bahia Blanca ……… Dr. Cattaneo ( CW . Telegrafía ) .

As promised, I detail the results of my tests at my facilities for October 17- 21 from Puente del Inca ( Mendoza ), with a “Western Electric” receiver, one tube for high frequency reception, detector, and one tube for low frequencies.

The weather was variable, cloudy and snowing on the 21st. Static was relatively strong on days 17-19, but there was little static on the 20th and 21st.

Radio Cultura and Radio Sudamérica [Buenos Aires] were also heard during the day, the first with the headphones on the table.

Sociedad Radio Argentina, 1100 kilometers away, was received well at night.

From Montevideo, 1300 kilometers, I got Paradizábal and Radio Sudamérica, and also the following:

Radio Club of Villa María (Cordoba ), 650 kilometers;

Radio Club de Tucumán, 850 km;

Station 340, San Juan, 200 kilometers, daytime, and Radio Pekam;

Station 394, Rio Cuarto (Cordoba), (initial number somewhat dubious ), 550 km

Radio Club of Rosario de Santa Fe, 900 km;

Radio Chilena de Santiago de Chile, with headphones on the table and at a distance of 120 meters [sic](1) ;

A. B. C., Viña del Mar (Chile).

My antenna is too long, allowing me to listen to only a few amateurs, but I will try again.

As always, during their conversations various radioamateurs did not give their names.

I think it is interesting to make three observations: 1) there are stations on the frequencies of Radio Sud América, Radio Cultura and Paradizábal, causing heterodynes, so it is impossible to receive one station without the other; 2) several of th smaller stations produce noise from the generator, or the rectified AC, that is louder than the music they broadcast, with horrible results; and 3) several stations produce carrier waves equal to or stronger than that of Radio Cultura, but the modulation is so low that the voice is barely heard.

In my view, there are stations that could double their transmission range if they paid more attention to their modulation than to the current at the antenna.

I do not mention the stations, but I’ll be glad to answer directly to the abovementioned amateur stations if they contact me at: “Superintendent of Telegraphs. F. C. Transandino. Mendoza.”

-John English

Broadcasting station HA9, Villa María, Córdoba, Argentina. “one of the best of the countryside”. (1925).

Mr. Raven-Hart, was in fact an active chronicler of the pioneering radio activity that had been developed at that time in the Southern Cone of America.

By the end of May 1926, he returned to Europe, spending some time in Spain and Italy. Then, he travelled to the U.S., where he was received by the organized amateur radio community in this country as a representative of the South American hams, in recognition of the 9TC success. He returned to Buenos Aires in 1927.

It is worth mentioning his impressions on his European tour. He summarized the status of radio in Europe in two words: “Little news”. However, he commented on the “new” Loewe brand of vacuum tubes, which he had the opportunity to test, “as detector and dual audio frequency amplification at the same time”, with results that he described as wonderful. He also found good broadcast programming. As to the receiving apparatus in use, he considered that it was“inferior to that used in the U.S. and Argentina and much more complicated”.

In 1932 he retired from his engineering profession, and traveled to Ceylon (now Sri Lanka) to do canoeing. Actually, he navigated more than 15,000 miles of the rivers in the world, using a folding canoe.

One of the books authored by R. Raven-Hart

During World War II, Roland James Raven-Hart was one of the 766 Argentine volunteers serving the Allied cause.

Roland’s life was undoubtedly an exciting global adventure. It is said that he was a friend of Colonel T. E. Lawrence (“of Arabia”) working for the Intelligence Department, and he seems to have been at least partly responsible for convincing the famous writer Arthur C. Clarke (author of “2001 A Space Odyssey”), a communications engineer colleague, to settle and live in Ceylon:

En route from Australia the ship docked in Sri Lanka (then Ceylon), where Clarke met Major R. Raven-Hart, OBE. “A remarkable linguist and lover of exotic places, cultures and customs,” said Clarke. “It was my first introduction to the fabulous Orient. I’ve been here, more or less, ever since”.

He was the author of several books, especially about his canoeing activities, and he wrote an article in collaboration with composer Lennox Berkeley entitled “Wireless Music”.

In December 1923 KDKA would be rebroadcast in Great Britain, and had even been received in Hawaii, and later, on March 25, 1924, KDKA broadcast entirely in Castilian for the South American nations .

In early 1924 it would be heard for the first time in Uruguay.

Sources:

Interview to Mayor Ingeniero Roland Raven-Hart, “Revista Telegráfica”, ob. cit., January 1927.
“Major Rowland Raven-Hart and his “Canoeing in Ireland””, en “Irish waterways history”.
“Arthur Clarke Spins Tales of Outer Space, but He’s at Home in a Sri Lanka Sarong”, by Marcia Gauger, in People.com.

-Originally published in my blog “La Galena del Sur”, (in Spanish).

-Special acknowledgment goes to Mr. Jerry S. Berg, USA, for helping with the best translation of the original article.

Amazing story, Horacio! Thank you for taking the time to translate this fine article into English!

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Guest Post: Remembering our Elmers

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Photo: Mario Filippi (N2HUN)

Many thanks to SWLing Post contributor, Mario Filippi (N2HUN), for the following guest post:

‘Tis the Season to be Jolly and to Remember Our Elmers

by Mario Filippi (N2HUN)

At this time of year when we gather with friends, family, coworkers and acquaintances to share the bonhomie and joys of the holidays let us fondly remember those who brought us into this hobby, our dear Elmers, those individuals who’ve given of their time teaching us the basics of ham radio, answered our endless questions, inspired us by their shacks, guided us through the difficulties of radio theory and good operating practices and proctored us through our first examinations. If it weren’t for these selfless individuals, who followed a time-honored tradition of mentoring budding hams, the hobby would not continue on and most of us might have taken other paths and missed out on a life-long, very rewarding hobby.

To start the ball of reminiscences rolling, take a seat with me in the time machine of memories and go back to the early 1970’s, to the suburbs of White Plains, NY, the home of my Elmer, may he rest in peace, George Buchanan, WB2FVX (SK).

George held Novice classes once a week in the basement of his home where he tutored a gaggle of ham wannabes consisting of grammar school kids to those of advanced age, some of whom were old railroad telegraphers schooled in the use of sounders. We’d have an hour of lecture, followed by code practice, then the class would end with general socializing amongst the students as to what transpired along with our future plans for our “shacks.”

You know, George did not quit his day job to train us through our larval stages of the hobby; as a matter of fact he commuted to the city every day and still found the time once a week to start his 7:00 PM class for his eager students, and always had energy after a long day’s work to stand in front of his chalkboard and work out the numerous electronic calculations (OHM’s Law, parallel and series circuits of resistors and capacitors, antenna resonance and impedance ) and list important regulations that would be included in our FCC Novice exams. At the conclusion of the three month course, George sat through our Novice exams and mailed them off to the FCC Office in Gettysburg, PA. Back then it took a few months before you’d get your license and hold in your hand the fruits of your (and your Elmer’s) labors.

George has been a silent key for decades now, and he frequently comes to mind, especially during the holiday season, when thoughts of Christmases past and all of the pleasant memories of almost forty years in the hobby occupy my mind. Indeed, George and all the other Elmers out there, living and deceased, have bestowed upon us one of the greatest gifts of all – Amateur Radio.

Think back on your Elmer and do so with fondness and when the opportunity presents itself, take an inexperienced ham under your wing, guide them, inspire them, show them your shack, answer their questions, help them pick out a rig or accessory, have a QSO with them, help them with troubleshooting, accompany them to a hamfest, share the joys with them when they purchase a piece of equipment, and most of all, be there for them.

Merry Christmas and Happy New Year to all!

Thank you, Mario, for sharing these special memories with us! George was an ideal Elmer indeed–he had the ability to share his enthusiasm and passion with others and helped them obtain their license during a time when study materials were not so readily available (and the test was much more challenging!).

Thank you, Mario!

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Guest Post: The Story And Restoration Of My Hallicrafters SX-42

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Many thanks to SWLing Post contributor, Arthur Smith, who shares the following guest post:

The Story And Restoration Of My Hallicrafters SX-42

by Arthur Smith

As a junior high student way back in 1978, I had a natural interest in radios. My dad was a ham radio operator, electronics engineer, and designer. We always had cool, exotic radios and electronic gadgetry around the house. He was also in the Korean War, in the US Army Corps of Engineers, with access to a wide variety of equipment. He often told me the story of how he became interested in radio at an early age, and how he saved up for expensive radio gear, with a little help from my grandparents. Back in 1946, Hallicrafters was THE brand to own, and their postwar designs from Raymond Loewy, were catching the eye of many enthusiasts. The SX-42 was being hyped up in Hallicrafters ads as the ultimate radio to own, one that could tune the shortwave and ham bands, and beyond. I don’t know the complete story, but prior to acquiring his SX-42, my dad also purchased an S-38 and S-40. Never satisfied with “good and better”, my father wanted “the best”. All 15 tubes and 50-plus pounds of boatanchor.

Always ambitious and industrious, he mowed lawns, repaired motorcycles, and did odd jobs for neighbors in his suburban Boston neighborhood. He worked smart, and worked hard. And that fall, bought his SX-42.

The radio, we think, was about $279, which would make it the equivalent of almost $3500 in today’s dollars. He heard the start of the Cold War, and the Soviet Union’s Sputnik. And the birth of Rock and Roll on FM! He graduated high school, went away to the Korean War, serving two Tours of Duty. He came back home, and became an electronics engineer. And a licensed ham radio operator.

Moving ahead to 1978, and yours truly had the radio bug, in the worst way. Not as ambitious or as savvy as my father, a classmate, who was also a ham radio operator, told me about a National HRO he had, with some coils, and maybe needing some work. My Dad came home from work, and I just had to tell him about this great opportunity, which of course, would require his financial backing. At this point, the SX-42 and his other two Hallicrafters were seeing “backup” duty, having long since gone solid state in his post. “Hey, I’ve got an idea!” When a Dad says that, a son usually wants to run. Not in this case. “How about we give you my SX-42?!” Gee, twist my arm. I had loved watching those mesmerizing green back lit dials, S meter, and geared tuning knobs. Unfortunately for my classmate, he had to keep his National. Fortunate for me, I had my father’s SX-42!

That radio logged my first 100 countries, including QSL cards from countries and stations no longer in existence. It heard the fall of the Berlin Wall. And, it was at the heart of my school Science Project, which made Science Fair, featuring an experiment on longwire shortwave radio reception.

Years later, the focus became family, a child, and a house. The SX-42 and siblings came with me, but this time, in boxes. After having seen a WW2 vintage Hallicrafters S-20R at a consignment shop a couple of summers ago, I thought how cool it might be to have Dad’s radios electronically and cosmetically restored.

The S-38 and S40 were in a box in my damp basement. While intact, they had a considerable amount of rust. Luckily, I was able to find a gentleman with great electronic and mechanical skills. He brought the S38 back to life, working and looking beautiful. And is working still on the S-40. As for the SX-42, that was upstairs in a box in my son’s closet. Dry and somewhat preserved, but with some corrosion on the control panel. And sadly, that iconic lock knob that switches between main tuning and brandspread tuning, had been lost in the move. I had to find someone who could take this project on.

After an extensive search, I found my man. An engineer with his own business, who was moving into retirement, and shutting his business down. He had restored an SX-42 a few years back, with amazing results. I had to lure him out of retirement! Which I did after a few emails back and forth. And, he was within driving distance! First warning was “do not power the radio back up under any circumstance- you’ll fry the wafers on the bandswitch!” I resisted temptation, as I had read online that these were notorious for failure, usually to some original capacitors that leak over the decades.

After 13 months replacing every capacitor, virtually every resistor, and vacuum tube, the iconic radio was coming back to life, in a great way. The transmission and gears in the tuning was re-lubricated. During the restoration process, a date was found stamped on the chassis of October 25th, 1946. Could it be?

Hallicrafters had advertised in the Oct, 1946 issue of Radio News that “The first hundred are always the hardest to build.” This, coupled with the fact that none of the chassis circuit had been modified, lead my restorer to believe that my radio was one of the first 100 SX-42’s that Hallicrafters had built!

The front panel was stripped and treated, professionally painted and silkscreened. The cabinet and apron bead blasted, repainted, and clear coated. It came back home with me last month. A month after it turned 70.

As you can see here, the radio looks stunning. And, with all the Hallicrafters Service Bulletin mods implemented, sounds and performs better than I remember. Maybe more importantly, we were able to locate a replacement brake lock knob for the tuning shaft, even with the “Lock” decal and arrow showing to rotate it counterclockwise. It just would not have felt complete without that little knob- and, it works!

Engaging a set of what essentially are brake pads, you rotate it once to disengage the main tuning and engage the bandspread tuning. Again, and you’re back to main tuning.

This radio will always remain a truly cherished family heirloom, and will be my son’s someday. Complete with the original owner’s manual, and Darth Vader-like R42 Reproducer (speaker).

Hopefully to live on for another 70-plus years, and hear more history along the way.

-Arthur Smith Worcester, MA

Wow–! Thank you so much for sharing your story with us, Arthur. No doubt, your SX-42 will certainly outlive all of us and will hopefully continue to be passed down through your family. What a wonderful story.

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The brilliant little Tecsun PL-310ET: serious DXing on a budget – part 1

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Hi there, a good friend of mine Mr Thomas Brogan mentioned to me recently that his little Tecsun PL-310ET was proving to be an excellent receiver and that it would suit my DXpedition activities. Now, as someone who likes to push the envelope of performance with sophisticated portables, usually coupled to very large antennas, a cheap little Tecsun might not have been an abvious choice for my next purchase. However, Mr Brogan (who has an excellent Youtube channel by the same name – check out his wonderful collection of vintage and modern receivers) previously suggested I buy, for similar reasons, the Sony ICF-SW100. That little masterpiece of electronics turned out to be one of the best receivers I’ve ever owned. I felt compelled to take notice because Tom never gets this stuff wrong! A few days later I found myself in Maplins – again – and there it was on the shelf at just under £40, so I bought one.

I got back into shortwave listening about 18 months ago, after many years of inactivity whilst my poor Sangean ATS-803A rotted away in the garden shed and Sony ICF-7600G long-gone via eBay. To start all over again, I bought a Tecsun PL-360. What a great little portable that turned out to be – there are over 100 reception videos on my YouTube channel demonstrating how it continually performed above and beyond the very modest price tag. I even managed to hear ABC Northern Territories 4835 kHz on it once – simply amazing for a receiver under £30. Given my extensive experience with the PL-360 and having learned the PL-310ET shared the same DSP chip, I was expecting the same, or at least very similar performance and the only real benefit to upgrading to the PL-310ET was the direct frequency access. However, I was wrong about that!

The brilliant Tecsun PL-360 got me back into shortwave radio for less than £30

About a week after buying the PL-310ET, I managed to get out on a DXpedition and with 30 metres of wire attached to it via the external antenna socket, I started tuning around the SW bands. Quite simply, I was amazed at the sensitivity and selectivity of this diminutive little portable. With the proven DSP receiver chip and a number of audio bandwidth filter options from 1 to 6 kHz, coupled with direct frequency access via the keypad, it was a joy to use and listen to. In just over an hour I had copied signals from North Korea, including their internal service KCBS Pyongyang, Zanzibar BC, ABC Northern Territories (at the first attempt!), Zambia NBC Radio 1, Radio Oromiya and Radio Amhara from Ethiopia, amongst others. Brilliant stuff and clearly demonstrating that the overall hardware/software package with the PL-310ET is a step up in performance over the PL-360 and capable of proper DX for a very modest outlay. Interestingly, in a conversation with Thomas Witherspoon regarding the PL-310ET, he reminded me that it was one of his go-to radios for travelling and confirmed it’s excellent performance. I would definitely recommend this radio to novices and experts alike.

Reception videos follow below, with more to come in part 2; I hope you enjoy them. Thanks for watching/listening and I wish you all excellent DX!

Clint Gouveia is the author of this post and a regular contributor to the SWLing Post. Clint actively publishes videos of his shortwave radio excursions on his YouTube channel: Oxford Shortwave Log. Clint is based in Oxfordshire, England.

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Sony ICF-2001D/2010 vs ICF-SW77: The final result & next contender ~ The Eton E1

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Hi there, after conducting a total of 14 reception tests comparing these two vintage – but excellent portable shortwave radios, there was a clear winner – the ICF-2001D. Interestingly, the second half of the testing identified yet another example of synchronous detection lock dropping out on the ICF-SW77 (during reception of Radio CANDIP, Democratic Republic of the Congo on 5066.4 kHz). Generally, however, and despite a fairly narrow performance margin, the ICF-2001D managed to deliver clearer audio across 5 of the remaining 6 reception tests, giving a final score of 9 to 3 in it’s favour. However, despite the clear win, there is no doubt in my mind at all that the ICF-SW77 is still a great portable receiver and in my humble opinion, remains one of the best ever made.

I believe this comparison test reveals the only likely remaining contender to the top-spot in portable shortwave receivers to be the Eton E1/E1XM. Originally to be marketed as the ‘Satellit 900’ (that never happened) and following a decade of development, involving RL Drake, it was finally introduced in 1995 – and then out of production within a few years. Fortunately, a couple of months ago, I managed to snag one in excellent condition on eBay, for a reasonable price. Now, these radios are not without issues, including, but not limited to; sticky rubber exterior casing, malfunctioning display, failing function keys and general all-round fragility. Not exactly what I would be looking for in a rugged, well-performing portable for my DXpeditions. However, as someone who is always exploring ways to ‘push the performance envelope’ and the obvious potential benefits of passband tuning, an allegedly superior synchronous detection circuit, 4 audio bandwidth filters and tuning resolution down to 10 Hz, the E1 was impossible for me to ignore. Thus, at some point in the near future, I will perform a similar comparison test with the Sony ICF-2001D and the Eton E1. Whichever camp you might be in, I hope you’ll enjoy the reception videos and find the results/conclusions informative.

For now, wishing you all excellent DX.

The Eton E1; possibly the best portable shortwave receiver of all time?

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Review of the DoxyTronics 8020CA magnetic loop antenna

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(Image source: DoxyTronics)

Many thanks to SWLing Post contributor, Troy Riedel, who shares the following guest post:

Review: DoxyTronics Portable HF Magnetic Loop 8020CA

-by Troy Riedel

Before I purchased the DoxyTronics 8020CA antenna, I emailed the owner/manufacturer and asked if he felt this antenna would be a good choice with the radios that I own. He promptly and courteously answered my question and I purchased the antenna on September 30th. I received the antenna approximately 6-days after I ordered it.

The DoxyTronics 8020CA magnetic loop antenna

I have been evaluating the antenna for 5-6 weeks mostly on my Grundig Satellit 750 and my Grundig G3. I have used other portables but the two aforementioned Grundigs were the radios I used most.

The antenna control box has a ¼-20 hole on the bottom so it can be mounted to a video camera tripod. The assembled antenna weighs 3 lbs. I tried using a light duty DSLR tripod that I own, however that was nowhere near sturdy enough. I had to use a heavier duty tripod (Ravelli AVT) that I use for astronomical purposes. This Ravelli has a weight capacity of 16 lbs and it easily supported the antenna. I’m confident a much smaller and lighter duty tripod than the Ravelli could be used, I simply don’t own anything in-between as my astronomical binoculars and binocular telescopes weigh 5 – 14 lbs.

The 8020CA Antenna consists of a large tuning knob and control box. The control box has switch settings of 3-5 Mhz and 5-15 Mhz. In testing, I found that I could “tune” up to 17.840 MHz. No batteries are needed to operate.

The antenna worked equally well with all of the “portable” radios that I tested (I am a SWL’er, not a ham).

I can summarize the antenna’s performance as this: it is not a magic elixir that will allow you to capture signals too faint to recognize without the antenna attached, but it definitely enhances the signal and “stabilizes” it to the point where the level of the signal remains relatively constant (less peaks & troughs in signal strength).

Hopefully you can hear what I have summarized and concluded. I have included a two and one-half minute recording of the following:

Radio: Grundig Satellit 750
Recorder: RadioShack 140-214
Freq: 7.310 MHz
BW: Wide
Broadcaster: Radio Romania International
Date of Recording: 15NOV2016
Time: 2309 – 2313 UTC

Click here to download as an MP3.

00:00 – 00:30: 8020CA Antenna Attached
00:30 – 01:00: Radio’s Whip Antenna
01:00 – 01:30: 8020CA Antenna Attached
01:30 – 02:00: Radio’s Whip Antenna
02:00 – 02:30: This last 30-second segment is with the 8020CA attached, however I am panning the Ravelli tripod 360-degrees in the horizontal. You will hopefully notice that there is a “sweet spot” where the signal and reception is the best of the entire 2:30 recording. I had set-up the antenna and I completed a quick, test recording of Radio Romania. But conditions changed slightly and the best signal during the recoding was approximately 50-60-degrees away from where the best reception was earlier. This is a positive for the antenna: you can pan the tripod head where the antenna sits to null and/or find the best signal.

Note: this is my first shortwave and radio-related review I have ever done. I have done many astronomical reviews – where I have much more experience – so please be kind towards this first attempt.

No worries, Troy! We’re kind and appreciative here–especially since guest posts are all about sharing our experiences and experimentation!

I must say, the DoxyTronics loop is doing a fine job mitigating the local QRM/interference that is easily heard when only the telescopic whip is being used. I’m also impressed that a passive loop this modest in size has so much gain without amplification.

Thanks, again, Troy for sharing your review!

Click here to view and/or purchase the DoxyTronics 8020CA magnetic loop antenna.

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Which is the best? Sony ICF-2001D/2010 or ICF-SW77? The halfway score

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Hi there, here is a summary of the first half of tests comparing the Sony ICF-2001D against it’s replacement the ICF-SW77. Both receivers are widely acknowledged as being amongst the best shortwave portables ever made, but how close are they in performance? Is there a clear winner after the first 8 reception tests? I hope you enjoy the summary video. Links to the first half of reception tests follow again, below, whilst the second half will follow in a separate post. Thanks and good DX to all.