Tag Archives: Jack Dully

Shortwave Australia: On the air from Central Victoria

(Image Source: Shortwave Australia on Facebook)

Many thanks to SWLing Post contributor, Jack Dully, who shares a Tecsun Australia article highlighting several shortwave stations including Shortwave Australia.

Shortwave Australia is a non-profit station transmitting from Central Victoria in the 120-meter and 60-meter bands on 2,310 kHz and 4,835 kHz. Late afternoon and nighttime coverage typically reaches much of southeast Australia under normal conditions. Of course, Shortwave Australia would be a brilliant weak signal DX catch from outside the region.

Their programming is varied and intentionally distinct from mainstream broadcasters — a reminder that shortwave radio still provides space for independent voices and creative content!

Read the full post on Tecsun Australia’s site.

Listeners can reach the Shortwave Australia directly at [email protected] or via their Facebook page.

Jack recommends antennas from Lowbander’s Antenna Mart on eBay

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Many thanks to SWLing Post contributor, Jack Dully, who writes:

Happy Holidays to Y’all!!! Thomas, I have bought about 5 antennas from the eBay seller”Lowbander” over the last few years. […]They are well constructed, strong and really bring in signals on the fringe. He has a small operation, I believe, but dedicated to making the best antennas he can. His antennas will last through storms and such but grab signals like a fly on honey, no kidding. Perhps other SWLing Post members don’t know of these excellent antennas at what I think is a good deal and worth the cost for years in the air. Thanks.

Clic here to check out Lowbander’s antenna offerings on eBay.

Note: this is an eBay partnership link–purchases support the SWLing Post at no cost to you.

Thank you for the tip, Jack!

Jack remembers the Eavesdropper Antenna

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Many thanks to SWLing Post contributor, Jack Dully, who shares a link to this Eavesdropper antenna on eBay and writes:

When I had my roof top antennas, with the original building owner, I put up the Eavesdropper. There were 2 versions: this one with the twin lead-in and the second with a coax lead-in connection. I had both. One strung E&W and the 2nd N&S with a MFJ ant. switch. Both were up for about 7 years with a Zap Trapper surge protector and good cold water ground. They were pretty rugged withstanding blizzards, hurricanes and summer thunderstorms.

Back then, a company called Antenna Supermarket sold them for about 45 bucks a piece. Both worked great for me and they were only about 45′ long center fed From Yonkers, N.Y. I could pull in Madrid and Australia and New Zealand very clearly on my Eton E-1 XM. So I thought some readers might be interested in buying an eavesdropper on eBay, it works well. Take care and enjoy !

Thank you for sharing that, Jack!

I remember seeing the Eavesdropper advertised back in the day. I still believe it must have one of the best antenna names ever! The product image brings back memories of browsing radio catalogs!

Jack finds that chokes have a huge impact on switching power supply noise

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These “Wall Wart” type adapters can create a lot of RFI

Many thanks to SWLing Post contributor, Jack Dully, who writes:

I was putting some things in my radio junk parts box and came across some chokes. So I tried a test with my Tecsun PL-880 on battery and the Tecsun supplied switching AC adapter, with and without chokes on the adapter.

WOW!

I tuned to a vacant station on battery power with headphones on. Then on AC power, the hash and static were incredible. Putting one large choke on the adapter power cord, wrapped about four times and it decreased considerably. So I attached a second choke and once again the static & hash decreased even more, almost to the point of sounding like I was running just on battery power.

Those chokes really do work well.

Thank you for sharing this, Jack. I almost never operate my portables while connected to a power supply, so I often forget about the importance of using a choke with inexpensive, lightweight radio power supplies. Thing is, so many things in our houses and shacks are powered by these QRM generators. In the shack, I’ve added chokes I’ve picked up at hamfests to a number of various power supplies. It does certainly help decrease the noise level. I’ve even used them on power cords for other appliances in the house that tend to spew RFI.

If you ever find a deal on chokes at a hamfest or electronics store, grab some. They can be an affordable solution for those noisy power supplies we still rely on.

Thank you for the reminder and tip, Jack!

Shortwave portables, external antennas, overloading, and electrostatic discharge

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Many thanks to SWLing Post contributor, Jack Dully, who writes:

I am just wondering what portable receivers are more susceptible to overloading with long dipoles, say 60-70 ft.

I regularly use such and I have never noticed anything unusual happening with a Sony ICF-7600GR, Grundig G3, or PL-880 to name a few. I just ordered a Tecsun 680. Perhaps many of the newer radios have better AGC thresholds or more robust front ends but I really don’t know for sure.

[Also] how exactly do you know if your receiver (portable OR not) is being overloaded by too big of an antenna (ie. dipole, inverted V and the like) and will it damage your receiver? Is there still a way of using a large antenna to capture more distant stations safely, especially with good quality portables?

Thank you for sharing this question, Jack, and my hope is that SWLing Post readers can chime in with details and advice in the comments section of this post.

These are deep topics, but I’ll try to answer a few of your questions…

First of all, you definitely can harm a portable radio by hooking it up to a large antenna. Many portables have no means of protecting themselves from ESD (Electrostatic Discharge). By hooking a portable up to a long wire antenna, you can expose it to ESD which will essentially deafen your radio until you’re able to repair it. Indeed, this reminds me of an article from our archives regarding a Tecsun PL-600 ESD repair. Some radios do have built-in ESD protection (like the PL-680), but I’m not entirely sure it would offer protection from a particularly strong ESD pulse.

Symptoms of overloading can vary. Sometimes overloading can sound like background splatter and even popping. Sometimes you’ll hear “images” of broadcasters across the bands; muffled audio of a blowtorch station. Another sign of overload is when your signal meter jumps at the same time your receiver goes deaf. It’s as if your radio is simply overwhelmed by strong signals and it can manifest itself in odd ways especially since the AGC usually falls apart.

Like you, I’ve found that my Sony ICF-7600GR seems to be able to handle large wire antennas with no discernible overload. Also, the Tecsun S-8800 (above) is well-equipped to handle larger external antennas and even sports a proper antenna port on the back. I know Sangean ATS-909X owners who only use their radio with an external wire antenna and have excellent results.

Some portable radios are very sensitive with the built-in whip antenna, but fall apart if attached to a long wire antenna.

In general, the cheaper the radio, the less likely it has a front end and filtering that can cope with overloading.

Overloading advice?

Please comment with your experience regarding overloading. Have you found some radio models better than others at coping with blowtorch stations, for example? What do you do to protect your receivers from electrostatic discharge when hooked up to large antennas? Please comment!

Tecsun PL-990 in stock again

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Many thanks to SWLing Post contributor, Jack Dully, who notes that the Tecsun PL-990X is back in stock at Anon-Co. Click here to check out their ordering page.

In addition, Tecsun Radios Australia is offering free shipping today (Friday 13, 2020).

If you’ve been considering purchasing the PL-990 or PL-990x, I’d encourage you to check out the following posts and reviews:

MFJ’s Origins

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Many thanks to SWLing Post contributor, Jack Dully, who writes:

MFJ has gone through a metamorphosis with their marketing and I thought that some radio readers might find this brief origins of MFJ interesting!

From their September 2020 Newsletter:

MFJ: Labor of Love

October, 1972.

Richard “I am not a crook” Nixon was our country’s president, The Dallas Cowboys beat the Miami Dolphins in Super Bowl VI, The Godfather was released to cinemas, George Carlin is arrested in Milwaukee, Wisconsin for uttering his ” Seven Words You Can Never Say On Television” comedic routine, Bobby Fischer defeats Boris Spassky in a chest match in Iceland, and in the small college town of Starkville, Mississippi a young Martin Jue started MFJ Enterprises, Inc., while still teaching at Mississippi State.

Martin F. Jue built this company back in 1972 with his bare hands. There were no other employees besides himself and he had a full time teaching job at Mississippi State University. The CW-F2 was his first product. It came about through a love of ham radio and in particular Morse code.

Since it is the day after Labor Day we thought we would salute the gentleman that brought us where we are today, The World Leaders in Amateur Radio Accessories! Without Martin Jue’s undying love and hard work for his namesake business, we all wouldn’t be enjoying our years here. MFJ has never had a major layoff or shutdown for any reason. 48 years later from Martin Jue’s single man company, we own four other businesses, have a tremendous product line and some of the most wonderful folks building ham radio toys under MFJ Enterprises, Inc.

Thanks again Martin Jue for your Labor of Love, MFJ the business. We are all grateful to you to be a part of your very successful venture into the world of business and ham radio. Your labor of love is greatly appreciated!

The CW-F2

Produced in October 1972, the CW-F2 was designed for the big boat anchor rigs of the time to help in CW filtering. The CW-F2 could separate two CW signals and make for more enjoyable listening. Mr. Jue used to give extra credit to his students if they helped build some of these.

The MFJ-998RT

Look at how far we have come! SMT, modern metal punching and forming machines. Here are the insides of the modern MFJ-998RT, legal limit automatic remote antenna tuner.

We salute all laborers out there for a job well done, especially our front line doctors, nurses, police officers, our US military, and Army National Guard during these crazy times. We appreciate you and our many customers! God Bless You All!

BTW — If you want to build your own modern CW-F2 kit today, the product is still alive on our Vectronics kit line as a CW audio filter kit.

P.S. VEC-820K is very similar to the first product of MFJ. A CW Audio Filter kit that you can have fun building yourself and relive a little history of MFJ!

Click here to visit MFJ.

Thank you for sharing this, Jack!

MFJ does something that few other US manufacturers can do. They still keep the majority of their manufacturing in Mississippi and they have a solid warranty. You can even reach a human being in customer service and they repair or replace their own gear. They do this while keeping their prices very competitive.

Their gear must be the most widely used here in the States. You’re hard-pressed to find a ham who hasn’t purchased from MFJ.

Their founder and president, Martin Jue, is a top-shelf fellow, too. I’ve met him a number of times. He’s an inspiring guy with an amazing story. His employees love him, too, because he’s fully invested in his company, his community and his hobby. His company has virtually no churn at all–most of his employees have been with MFJ their entire working career.

Last month, I was very proud to add MFJ as a sponsor of the SWLing Post.