More about hacking VGA cables to make binocular ferrite cores

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A few days ago, we posted an a short article showing how Oscar hacked a VGA cable to make a binocular ferrite core for his homebrew NCPL/Youloop antenna. Many thanks to SWLing Post contributor, Grayhat, who explored this clever hack a little further:

Hi Thomas, Having some time in my hands Sunday afternoon I decided to try pulling out the ferrite chokes from a VGA cable I had around, and while doing so, I decided to coarsely document the process with some pics.

Figure 1

The first thing to do is use a cutter to carefully cut around the “washer” shaped plastic at the connector end of the choke (fig.1, #1,#2, #3 above), then on the same side, after cutting the plastic also cut the inner conductors (fig.1, #1).

Move to the other side of the choke, gently cut around the “washer” w/o cutting the inner conductors, now pull the cable to extract it from the choke (fig.1, #3), repeat the process for the other choke.

Now look at the “cans” containing the chokes, one side of those will show a “cap” (fig.1, #4), insert a small screwdriver into the center hole and gently ply to one side to raise the cap and extract it (fig.2, #1).

Figure 2

The result will be as in fig.2, where #1 is the closing cap, #2 is the ferrite choke and #3 is the “can” containing the choke. Repeat the process and you’ll have two ferrite chokes as shown in fig.3 (the VGA connector is there to give an idea of the dimensions):

Figure 3

At this point, use some tape (duct tape will be a better idea, I used clear tape just to make an example) to tie the two ferrites together as in fig.4 and you’ll have your “binocular ferrite”:

Figure 4

Willing to use whatever you have there to wind the transformer, you may now extract the tiny insulated wires from the VGA cable (fig.1, #3, see wires) and use them for the windings.

Notice that other cables may use different choke “cans” which may need to cut a larger portion around the flat faces at the ends. But remember that in any case, those are just “snap-in” cans containing the ferrites, so with a bit of attention and patience, it shouldn’t be difficult extracting the ferrites.

Based on a little online research, it sounds like the ferrites used to choke the VGA cables (HDMI ones too) are generally type #31.

Looking at some #31 datasheets it appears that while #73 is works fine at frequencies below 50MHz, the #31 is best suited for the 1-300MHz range.

This means that #31 won’t be the best pick for mediumwave, although if one doesn’t have another choice… well, go for that! Also notice that the ferrite permeability is different:1500 for #31 and 2500 for #73. This means that we’ll need to increase the number of windings to achieve acceptable signal transfer, otherwise the transformer loss will make our antenna deaf.

One might try increasing the number of windings to say 8:8 or 16:16; as long as the winding
ratio will remain the same, there won’t be problems (although the resulting bandwidth will become narrower).

Thanks for documenting and sharing this, Grayhat! Since most of us have more time on our hands at home, I think it would be worth experimenting with the number of windings to see how it affects the antenna performance. That’s a clever thought, too, to use the VGA wires to wind the Balun. As long as the cable is long enough for the amount of turns, it’s certainly the most efficient use of resources!

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DIY: How to build a Passive Resonant Transformer-Coupled Loop Antenna for HF reception

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We recently posted a tutorial on building a simple Noise-Cancelling Passive Loop (NCPL) antenna. This prompted SWLing Post contributor, Bob Colegrove, to share his excellent article on building a Passive, Resonant, Transformer-Coupled Loop (PRTCL) Antenna:

A Passive, Resonant, Transformer-Coupled Loop Antenna for Shortwave

By Bob Colegrove

Over the years I have resisted the level-of-effort necessary to construct and maintain outdoor antennas. Rather, I have focused on squeezing out all of the microvolts I could get inside the house. Many years ago I had access to a well-stocked engineering library, and used my advantage to gather information about the theory and development of loop antennas – a daunting undertaking for an English major. Ultimately, by adhering to a few basic rules, some of them dating back 100 years, I found quite acceptable performance can be had with an indoor passive antenna intersecting just a few square feet of electromagnetic energy.

Theory

There are a couple of advantages of resonant loops as opposed to non-resonant ones. The first is the fact that the signal dramatically increases when you reach the point of resonance. The second follows from the first in that resonance provides a natural bandpass which suppresses higher and lower frequencies. This gives the receiver a head start reducing intermodulation or other spurious responses. The downside of all this is that the resonant loop is, by design, a narrow-band antenna, which must be retuned every time the receiver frequency is changed by a few kHz. On the other hand, there is nothing quite as rewarding as the sight (S-meter) and sound you get when you peak up one of these antennas – you know when you are tuned in.

There is nothing new about the loop antenna described here. It’s just the distillation of the information I was able to collect and apply. There are a number of recurring points throughout the literature, one of which is the equation for “effective height” of a loop antenna. It basically comes down to the “NA product,” where N is the number of turns in the loop and A is the area they bound. In other words, provide the coil with as much inductance as possible. Unfortunately, for resonant loops, the maximum coil size diminishes with frequency.

With this limitation on inductance, the challenge becomes minimizing unusable capacitance in the resonant frequency formula in order to get the highest inductance-to-capacitance (L/C) ratio possible. Some of the unusable capacitance is built into the coil itself in the form of distributed capacitance, or self-capacitance between the coil turns. This cannot be totally eliminated, but can be minimized by winding the coil as a flat spiral rather than a solenoid, and keeping the turns well separated.

The second trick is with the variable capacitor. Even with the plates fully open, there is residual capacitance on the order of 10 to 20 picofarads which can’t be used for tuning purposes. A simple solution is to insert a capacitor in series, about ¼ the maximum value of the variable capacitor. This effectively decreases the minimum capacity and extends the upper frequency range. In order to restore the full operating range of the variable capacitor, the fixed capacitor can be bypassed with a ‘band switch.’ With the series capacitor shorted, the variable capacitor operates at its normal range and extends coverage to the lower frequencies.

Construction

I have constructed similar loops covering long wave, medium wave, and shortwave all the way up to about 23 MHz. I wanted to optimize this loop for the most active portion of the shortwave spectrum. Consequently, it covers approximately 2.6 to 12.3 MHz. See Figure 1.

Figure 1. A Passive, Resonant, Transformer-Coupled Loop Antenna for Shortwave

Figure 2 is a schematic diagram of the antenna. Cd (in red) is the distributed capacitance of the primary coil, L1. This is not tunable capacitance, but it still contributes to the resonance; likewise, the 15 pf minimum capacitance of C1. By adding C2, the minimum total capacitance can be lowered to greatly increase the upper range of the antenna. S1 is the ‘band switch.’ It shorts out the series capacitor, restoring the maximum low frequency.

Figure 2. Schematic Diagram

Frame – The frame is made from 3/8”-square basswood or poplar dowel (see Specialized Parts). Two pieces, each 36” long, have been predrilled at ½” intervals to accommodate the primary and secondary coil wire (think of a tennis racket). It is a good idea to drill holes along the length of each dowel – more than you will need. You may decide to change things later on, and drilling holes in an assembled antenna is not easy. Also the two dowels are notched in their centers to fit together. See Figure 3 and Figure 4. The clear plastic disk in Figure 4 is a packing disk from a spindle of CDs; it is cemented to the square dowels, and used to hold them at right angles. Any rigid, light-weight material will do.

Figure 3. Square Dowel Showing 1?2” Hole Spacing and Lacing of Secondary Coil

Figure 4. Cross Members Notched and Square Dowel Reinforcement

Primary Coil – With a coil size 36” in diameter, you likely won’t be able to get more than two turns of wire to resonate at frequencies up to 12 MHz. This takes into account the precautions described above to minimize unusable capacitance. AWG 22 stranded, insulated wire was used to lace this coil; ensure the dowels remain at right angles with one another. Note that one set of holes in the dowel is skipped between the first and second turn.

Tuning Capacitor – Almost any salvaged variable capacitor can be made to work. For a typical 2-gang unit, the gangs can be connected in series through the common rotor sections and metal frame with the stator terminals of each gang used as the outer terminals. This will create a lower minimum capacitance as described above.

For the antenna described here, a single-gang, 365-pf capacitor (see Specialized Parts) was used with a fixed mica capacitor in series. The minimum capacitance of the variable capacitor is nominally 15 pf. Figure 5 shows the capacitor assembly for the primary circuit. Components are mounted on a perforated circuit board, which, in turn, is mounted to the bottom of the vertical square dowel. A portion of the base can be seen at the rear. A large diameter tuning knob is suggested, as the peak tuning for a properly constructed loop will be very sharp and require a delicate touch. As an option, I have used a planetary reduction mechanism on other antennas to give an 8:1 ratio with the capacitor shaft.

You may notice at high frequencies that the antenna is somewhat unstable with body contact of the knob or around the tuning capacitor. This is because the resonant circuit is operating at a very high L/C ratio with capacitance at just a few picofarads. Body capacitance will tend to detune the antenna. It may be useful to extend the knob 2 or 3 inches from the tuning capacitor with an insulated shaft.

Figure 5. Capacitor Assembly

Secondary Coil – The secondary coil operates at low impedance to feed the lead-in. There are two extremes governing the size of the secondary coil. A coil which is too small will not pick up much of the magnetic field generated by the primary circuit at resonance. On the other hand, a secondary coil which is too large will overcouple or load the primary circuit. This will reduce the Q, or sharpness of the tuning.

The secondary coil is 16” diagonal at the largest turn and consists of 7 turns of AWG 20 buss wire. Buss wire was used so the coil can easily be tapped after the 1st, 2nd, 3rd, 4th, and 6th turn. The 7th turn is not currently used. A tapped coil will provide better impedance matches to the lead-in when the antenna is used through a wide frequency range. The taps are selected with a rotary switch. The taps are connected so that the outer turns are used first, and inner turns connected as needed. It is important that unused turns remain unconnected (free) rather than shorted. See Figure 6.

Figure 6. Secondary Coil Switch

Lead-in – A twisted pair of AWG 22 stranded wire is used as the lead-in. This will be more flexible than coax. The lead-in should be kept as short as possible and twisted tightly so it will not pick up any signal by itself. This is important at shortwave frequencies. A twisted pair can be fabricated from two lengths of wire with one set of ends anchored in a vise, while the remaining ends are twisted in the chuck of a hand drill. Most portable radios are equipped with a standard 1/8” phone jack at the external antenna connection point. So, this antenna is terminated with a 1/8” phone plug.

Base – There is nothing special about the base. Your only guidance should be to make it as stable as possible. Since the frame is light, most of the weight will be at the bottom with the capacitor assembly and other parts. That helps stability. This antenna uses a 5” plastic jar lid for the bottom. Keep the base small, as the antenna will likely be operated on a desk or table.

Operation

The antenna is intended to operate in close proximity to the radio, such as on a desk or table. There must be sufficient space to rotate the loop laterally. As described, this antenna has a range of 2.6 MHz through 12.3 MHz with a band overlap around 8 MHz. Depending on your selection of capacitors, your range and overlap may be slightly different.

Tune the receiver to a desired frequency.
Set the band switch on the antenna to the corresponding band.
Tune the antenna capacitor to resonance (peak signal).
Rotate the secondary switch to the position of maximum signal strength. Begin with the fewest turns (generally one) in the secondary.
It may be necessary to repeak the primary circuit.

Repeat the procedure to test operation of the upper or lower band.

Unlike similar loops for long and medium wave reception, this antenna is not especially responsive to direction for peak or null signal reception. However, you will find it very useful to reduce or possibly eliminate locally produced noise. Simply rotate the antenna on its base.

Modification

The basic concept for this antenna can easily be extended to higher or lower frequencies. Removal of the inner turn of the primary will significantly raise the upper frequency; whereas, adding turns will increase the lower range. Note that the lacing of the primary coil skips one set of holes in the square dowels between the first and second turn. This minimizes distributed capacitance between turns. This separation should be maintained if additional turns are added to lower the operational frequency.

Specialized Parts

Some sources for square wood dowel and single-gang 365 pf variable capacitors are listed below. The author does not endorse any of them. Prices for similar capacitors vary widely.

Square wood dowel:

Variable capacitor (365 pf):

Amazon
Walmart
Tubes and More
MTM Scientific
eBay (Multiple sources for both single- and double-gang capacitors)

Bob, thank you so much for sharing this excellent, detailed tutorial. Although I don’t have the exact same variable capacitor, I have all of the other components to make this antenna. I will have to put this on my Social DX bucket list! Thank you again!

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Radio Waves: Tribute to Gene Pell, Dangerous AM Demonstration, White House Criticism of VOA, and Essex Online Classes Break Records

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Radio Waves: Stories Making Waves in the World of Radio

Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers. To that end: 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 Troy Riedel, Dennis Dura, and Dan Robinson for the following tips:

Ernest Eugene “Gene” Pell 1937-2020 (Radio Free Europe)

As noted in this obituary published by his hometown newspaper, The Paducah Sun, Ernest Eugene “Gene” Pell, 83, died quietly on April 7, 2020, at his home near Syria, after a 3-year battle with cancer. Pell served as President and Chief Executive Officer of Radio Free Europe/Radio Liberty (RFE/RL) from 1985-1993, leading the Radios during the peaceful revolutions that occurred in Eastern Europe and the Soviet Union from 1989-1992.

In Tribute to Gene Pell

In 1989, we who were privileged to serve in the management of RFE/RL as Gene Pell’s colleagues watched the awesome professionalism of RFE/RL’s broadcasters as peaceful revolution swept from the Baltics to the Balkans, and the Radios helped each country share with others the power – even the slogans – of peaceful protest, and the wisdom of restraint by police and armed forces.

Romania was a tragic exception. Ceaucescu’s regime was doomed by RFE’s broadcast of a recording of the shooting of civilians protesting in Timisoara. As Ceaucescu fled Bucharest, and violence by unknown combatants erupted, Gene ordered a million watts of shortwave power from our transmitter stations across Europe diverted to the Romanian service. Before long, Romanian army commanders seeking to restore calm established phone contact with the service in Munich.

In the immediate aftermath of the liberation of Eastern Europe, and the 1991 collapse of the Soviet Union, Gene saw the need and found the resources to open bureaus across the region and begin on-the-ground reporting by talented local journalists – and local rebroadcasting of RFE/RL programming.

And he persuaded the U.S. government to allow RFE/RL for the first time to broadcast to the former Yugoslavia, during the Bosnian War, with a new, multi-ethnic service led by Nenad Pejic*.

On Gene’s watch, Lennart Meri, Foreign Minister of a newly free Estonia, nominated RFE/RL for the Nobel Peace Prize.

Gene’s leadership was crucial as another struggle soon ensued, this time in Washington, as efforts arose to save the federal government money by shrinking or closing the Radios, on the premise that if Europe was free, why did we need Radio Free Europe (and Liberty)? Support from new democratic leaders across the region, notably from Lech Walesa and Vaclav Havel, helped convince a Presidential Commission addressing this question that the Radios’ mission should not end but evolve, as it has.

The views of these freedom leaders were decisive in keeping RFE/RL on the air and positioned to win the enormous multi-media audience it enjoys today. Gene Pell’s vision is alive for future generations.

Two of my closest colleagues, Ross Johnson and Kevin Klose, join me, as I am sure many others would, in saluting Gene for his contribution to a freer world.

— Robert Gillette […]

A Dangerous Demonstration of the Power of Radio (Hackaday)

Terrestrial radio may be a dying medium, but there are still plenty of listeners out there. What would a commute to or from work be without a check of “Traffic on the Eights” to see if you need to alter your route, or an update of the scores from yesterday’s games? Getting that signal out to as many listeners as possible takes a lot of power, and this dangerous yet fascinating demo shows just how much power there is on some radio towers.[…]

White House Criticism of VOA, Unprecedented in its 78 year History (Public Diplomacy Council)

The Voice of America is the nation’s largest publicly-funded international broadcaster, reaching 280,000,000 multimedia users in 47 languages each week, many of whom access it daily for honest, balanced and accurate world news.

To most senior VOA officials, past and present, including this writer, an unsigned White House blog on April 9, 1600 Daily, omitted or misstated vital information about the scale and original date of the coronavirus outbreak in mainland China. That blog asserts in a bold headline: “Voice of America spends your money to speak for authoritarian regimes.”

But that attack was just the beginning.

President Trump went even further at his daily news briefing on April 15, largely devoted to the coronavirus. “If you heard what’s coming out of the Voice of America, it’s disgusting”. The President then assailed Congress for failing to take up his nomination of conservative Michael Pack as chief executive of all five U.S. funded multimedia organizations, the U.S.Agency for Global Media, until recently known as the U.S. Broadcasting Board of Governors.

The USAGM is the oversight body of five overseas multimedia U.S.-funded networks: VOA, Radio Free Europe/Radio Liberty, Radio Free Asia, the Middle East Broadcasting Network in Arabic, and Radio/TV Marti in Spanish to Cuba. Research in approximately 100 countries indicates that collectively, the five networks reach 350,000,000 people abroad every week.[…]

Essex Ham Foundation Online Training breaks all records (Southgate ARC)

The Coronavirus outbreak and the RSGB’s introduction of online exams that can be taken at home have led to a surge in demand for free online amateur radio training courses such as that run by Essex Ham

Volunteers from Essex Ham run a completely free online training course for the UK amateur radio Foundation exam.

A record breaking 260 people enrolled on the course that started April 5 with a further 164 waiting to start the next course.

In response to the demand Essex Ham are running an additional course, open to anyone in the UK, starting on April 19.

You can find out more about online training and register to join a course at
https://www.essexham.co.uk/train/foundation-online/

Essex Ham
https://www.essexham.co.uk/
https://twitter.com/EssexHam

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Radio Emma Toc World Service to start monthly shortwave broadcasts

Encore – Classical Music on Shortwave – Times and Frequencies

Radio Waves: Libre Space Foundation Reviews SDRs, ARRL VEC Statement, Pandemic Pastime, and Former CEO of RadioShack Now C-19 ER doctor

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Radio Waves: Stories Making Waves in the World of Radio

Many thanks to SWLing Post contributors Ron, Paul, Marco Zennaro, and Richard Langley for the following tips:

The Libre Space Foundation reviews software defined radios (Hackaday)

If you want to go to the next level with software defined radio (SDR), there are a lot of choices. The RTL-SDR dongles are fine, but if you get serious you’ll probably want something else. How do you choose? Well, your friends at the European Space Agency Libre Space Foundation have published a paper comparing many common options. True, they are mostly looking at how the receivers work with CubeSats, but it is still a good comparison.

The devices they examine are:

RTS-SDR v3

Airspy Mini

SDRPlay RSPduo

LimeSDR Mini

BladeRF 2.0 Micro

Ettus USRP B210

Pluto SDR

They looked at several bands of interest, but not the HF bands — not surprising considering that some of the devices can’t even operate on HF. They did examine VHF, UHF, L band, S band, and C band performance. Some of the SDRs have transmit capabilities, and for those devices, they tested the transmit function as well as receive.

The review isn’t just subjective. They calculate noise figures and dynamic range, along with other technical parameters. They also include GNURadio flowgraphs for their test setups, which would be a great place to start if you wanted to do these kinds of measurements yourself.[…]

ARRL VEC Issues Statement on Video-Supervised Online Exam Sessions (ARRL News)

Very few ARRL Volunteer Examiner teams have successfully conducted in-person exam sessions (following social distancing guidelines) and video-supervised exam sessions using fillable PDF exams and documents. So far, we have found that both types of sessions take volunteer teams two to three times longer to conduct and accommodate fewer candidates than sessions conducted prior to the COVID-19 pandemic. So far, the video sessions have included only one examinee per session.

We ask the community to be patient with our volunteer teams as they navigate uncharted territory. Please remember with the introduction of significant new processes such as these, that there should be proof of concept, establishment of protocols and procedures, and beta testing before expanding to a larger audience. Video-supervised exam sessions require a different skillset than in-person exam administration. Not all teams will be equipped to deliver video exams right away.

The ARRL Volunteer Examiner Coordinator (VEC) has been investigating options for an online examination system.

Fillable PDFs are cumbersome within a video-supervised exam session process. We recognize that online testing would represent a large-scale solution for our thousands of VEs and would make session procedures easier for our teams, but this will not happen overnight.

The ARRL VEC will continue to adapt and respond to the evolving crisis as we search for viable and easy-to-use online examination system solutions and conduct exam sessions in innovative ways.[…]

Pandemic Pastime – Shortwave Radio (KFGO)

Ever since I was a little kid, I was fascinated that at night you could listen to radio stations from all over the country. My little Heathkit radio, which I built myself, could pick up stations in Minneapolis, Chicago, St. Louis, Denver, Little Rock, Pittsburgh to name a few. West coast stations were rare because it was tough getting a signal over the Rocky Mountains.

Then there was shortwave radio. A buddy of mine had one and he showed me a list of all the countries he was picking up. England, France, Germany, Latin American countries, numerous stations on the shortwave bands in America. Even Radio Havana coming out of Cuba. Anything from religion to hard edge rock and roll. He also noted he picked up Radio Free Europe and the Voice of America.

Well years later I would stop by my local Radio Shack and decided it was my turn to take up this hobby of monitoring shortwave radio. This particular radio also had a built in cassette player so you could record your found stations as well. It was really interesting to hear the news from other countries and get their take on what was happening in America.

One of the first frequencies I tuned in was WWV a shortwave radio station out of Fort Collins Colorado, that broadcasts the time via the atomic clock. The seconds tick off until the top of the hour when you hear a voice announce the time, followed by a tone that hits the top of the minute exactly on the nose. Great way to set the clock.

Now I know you can probably find all these shortwave stations on the internet, but what fun is that right?

With the covid-19 pandemic, this is a little something different than binge watching television, or building that 10th jigsaw puzzle or cleaning out that closet again and again.

Have a chair on the patio, a glass of your favorite beverage, extend the antenna, and start turning up and down the dial and see what you can find. I had a little notebook that I kept track of my searches. Don’t have it now though…lost it.

I’ll start a new one.

Stay safe everyone![…]

Former CEO of RadioShack now an ER doctor (National Post)

‘I am just one of those people who was very fortunate, where things worked out, and where I could do not just do one thing I really enjoyed in life, but two’

Brian Levy loved science as a kid. He had a microscope, read up on stuff in the encyclopedia and messed around with home experiment kits. During his high school years, he took every science credit possible. By his own admission, he was a “geek,” one with an equally strong passion, alongside science, for electronics.

Levy knew how to operate a shortwave radio. Weekend teenage heaven, in his mind, was hanging around the local RadioShack store, a warehouse of gizmos where he scored his first part-time job in 1974, earning US$1.40 an hour at a shop in downtown Atlanta. He was 15, which, alas, was too young to be working for the company, according to the folks at corporate headquarters in Texas, who fired him upon receiving his paperwork.

The dismissal didn’t sit well with Levy.

“I actually called the vice president of human resources in Texas,” he says. The executive was impressed by the moxie of the kid. On the day he turned 16, Levy was hired back.

[…]Levy did not foresee the premature end to his business career. When it came, rather than being crestfallen, he felt liberated, and free to pursue an “itch” that he had always felt the need to scratch. So he applied to medical school at McMaster University in Hamilton, ON. (Levy came to Canada in the first place after relocating RadioShack HQ north of the border as CEO. He is now a dual citizen, although his soft, buttery accent betrays his roots in the American south.)[…]

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ARRL: “Remotely Administered Amateur Exam Systems Showing Promise”

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(Source: ARRL News)

Facing a growing demand for amateur radio exam sessions in a time of social distancing and stay-at-home orders, sponsors of some Volunteer Examiner (VE) teams have risen to the challenge and are developing systems to remotely proctor test sessions.

“Many of our VEs and VE Teams have been working on remotely proctored exam session ideas, employing both video and in-person components — following social distancing protocols,” ARRL Volunteer Examiner Coordinator (VEC) Manager Maria Somma, AB1FM, said. “We have been receiving interesting and innovative suggestions, and we appreciate the dedication and ingenuity our examiners have shown.”

The Spalding County Amateur Radio Club in Georgia is among those that have come up with plans to remotely administer amateur exams while complying with ARRL VEC testing standards during COVID-19 stay-home mandates and social distancing guidelines. Current systems leverage Zoom video-teleconferencing technology, the “Fill & Sign” feature of Adobe PDFs, reliable email, appropriate computer equipment and internet connection, and no volunteer examiners (VEs) present at individual remote test sites. The Georgia club collaborated and shared ideas with the Emergency Amateur Radio Club (EARC) in Hawaii, which has successfully conducted sessions since 2011 with its own remote testing system, initially with paper exams with a proctor on site and now with fillable PDFs, with no on-site proctor.

The Georgia club obtained ARRL VEC approval to administer video-supervised exams. The club’s David Robinson, K4WVZ, said the first exam session took place this week, with another set for next week, and “many more in the pipeline” going forward.

“We have started with testing just one candidate at a time but are planning to ramp up to multiple candidates — probably two or three — simultaneously,” Robinson told ARRL. “Before we do that, we want a few more single sessions under our belt and a few more Video VEs trained. It also gives us an opportunity to garner lessons learned from each test session and upgrade our procedures accordingly.” Robinson said this week’s session went “exceedingly well,” and the candidate passed the test.

The club’s procedures entail a pre-exam video interview with candidates to ensure they understand all the requirements and procedures. “This also allows us to test the candidate’s ability to work with the video and computer technology before the actual exam,” Robinson explained. “Training sessions were conducted for VEs to make sure they understood their role and how to use the technology.”

Following the exam, the VEs score the test and sign off on the paperwork, with the VE Team Leader submitting the application online and by mail, per ARRL VEC instructions. Application and successful exam are first accepted and then submitted to the FCC for processing.

New England Amateur Radio Inc (NE1AR), an affiliate of New England Sci-Tech, (NESciTech), has taken it one step further, Somma said. It got the approval of ARRL VEC to begin trials of what it describes as “completely online testing with strict rules and protocols for maintaining the integrity of the testing environment.” NE1AR is limiting candidates to one exam per candidate, due to the current candidate backlog and the “difficulty of administering exams online.” Candidates must agree to a list of protocols, which include no visitors (or pets) in the exam room and a cell-phone camera scan of the entire room and exam area “to show that there are no materials or people [in the room] that could aid in taking the exam.” If the VE team suspects the possibility of cheating, the exam may be terminated and the candidate barred from future online exam sessions.

“We began a series of trials on April 1 under ARRL VEC review and have now been asked to help train more VE Teams on the process,” NE1AR President Bob Phinney, K5TEC, told ARRL. “We have now tested 12 applicants and are still working on streamlining the process. We are working with the software developer of the exam delivery system to help them adapt the system for video-supervised testing.” At present, Phinney said, only one person at a time can be tested. Another time-related issue is how long it takes a candidate to go through the NE1AR security protocol. “Sometimes, the setup and follow-up for an exam take far longer than the exam itself, in order that we provide complete integrity of the exam session,” he said.

With pressure continuing to build to provide testing compatible with COVID-19 guidelines and stay-home orders, ARRL VEC Manager Maria Somma, AB1FM, has asked the amateur radio community to be patient. “Please remember that with the introduction of significant new processes such as these, that there should be proof of concept, establishment of protocols and procedures, and beta testing, before expanding to a larger audience,” she said this week. Somma said video-supervised exam sessions require a different skillset than in-person exam administration, and not all teams will be equipped to deliver video exams right away.

“ARRL is pleased to be one of the leaders in providing an opportunity, although limited initially, for video-supervised exams in this time of social distancing and isolation required by the current health situation,” Somma said.

Click here to read the full article at the ARRL News.

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