MFJ Enterprises Inc.

06/13/2024

Need a quick deployment antenna system for disaster preparedness, your next single man POTA or SOTA gig, or just for some family fun? -

05/28/2024

https://youtu.be/yQOvzsGhP3E?si=vGkVnzf3tC7JZ9N_

https://www.youtube.com/channel/UCu9VPhckeKef3dNAcJGBXwQmy [email protected]

05/20/2024

https://youtu.be/D3K21AM8v_g?si=mist2ihjm3i0lNzH

Track: Ardent — Pratzapp [Audio Library Release]Music provided by Audio Library PlusWatch: • Ardent — Pratzapp | Free Background M... Free Download / Str...

05/17/2024

Rich,

Just wanted to say thanks a ton for the use of this 2m/70cm Yagi antenna. I did several videos showing its functionality in different orientations from horizontal to vertical to left 45 degree slant and right 45 degree slant. Here are the links if you want to see it work.

https://youtu.be/NHEExDdjxMA?si=9w7wVe1AuFXqWQK9

Thanks again,

Mike (K0FYR)
Ham-Solo

In this segment I finish up the horizontal polarization test with a 2m SSB net where everyone is horizontal as well. After that I do a net or two in a vertic...

05/14/2024

Free shipping from MFJ specialty products NOW! -

05/10/2024

05/02/2024

Cool Beans -

05/01/2024

https://youtu.be/637Y-Yopp2o?si=XUsOWYE0VRbZImTD

Track: Ardent — Pratzapp [Audio Library Release]Music provided by Audio Library PlusWatch: • Ardent — Pratzapp | Free Background M... Free Download / Str...

05/01/2024

https://youtu.be/3avvqva9yH8?si=T89_0nngSfQonHRW

[email protected]

05/01/2024

Seamless SDR Integration:

How the MFJ-1708B-SDR Enhances Your Ham Radio Experience

Author: Marius Lubbe ZS1ML

As a ham radio enthusiast, I've often found myself needing to manage my space and equipment efficiently, especially when integrating new technologies like SDR (Software Defined Radio) into my setup. That's where the MFJ-1708B-SDR, an RF-sensed T/R (transmit/receive) switch, really shines in my shack. This nifty device allows me to share a single antenna between my traditional transceiver and my SDR, streamlining my operations without compromising on functionality.

One of my favorite aspects of the MFJ-1708B-SDR is its RF sensing capability, which automatically switches between transmitting and receiving modes. This is incredibly handy for my radio setups that lack a dedicated keying output. Plus, the switch provides excellent isolation between the transceiver and SDR receive ports, ensuring minimal crosstalk and interference—this is crucial for maintaining clear communications.

Let's talk about a specific scenario where the MFJ-1708B-SDR proved invaluable: during a multi-band monitoring session. I was using my SDRplay RSP1A with SDRuno software to visually scan the spectrum and monitor band conditions. The ability of the MFJ-1708B-SDR to seamlessly integrate with my Kenwood 590 S without needing another antenna was a game-changer. I could visually track and monitor different bands and signals while still being ready to transmit at a moment's notice.

The device also includes a protection circuit to limit any RF spikes from the transmitter, which is a lifesaver for my SDR, preventing potential damage from high power transmissions. And with good SWR performance up to 450MHz, I don't have to worry about signal loss or mismatch issues.

Although the device generally performs well, I have learned from others in the community and my own experience that it's wise to use the manual TX control from my rig rather than solely relying on the RF sensing feature, especially to avoid power spikes during the transition from receive to transmit modes.

Finding the MFJ-1708B-SDR can sometimes be a challenge due to its popularity, but it's worth the effort to enhance your ham radio operations, particularly if you're diving into the world of SDR​

73 en mooiloop,
73 and kind regards,

Marius Lubbe – ZS1ML
Chairman: Boland Amateur Radio Klub
www.bark.org.za

We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa.

05/01/2024

Powering Possibilities: The MFJ-1104 and MFJ-1107 Power Pole DC Outlets Review

Author: Marius Lubbe ZS1ML

As an avid ham radio enthusiast and a tech reviewer, finding equipment that simplifies my setup and enhances the experience is always a thrill. The MFJ-1104 and MFJ-1107 Power Pole DC Outlets have been standout additions to my gear collection. Both devices are designed for easy and efficient power management across multiple devices that require DC power, making them ideal for any ham radio operator's toolkit.

Unboxing the MFJ-1104 and MFJ-1107

Right out of the box, both the MFJ-1104 and the MFJ-1107 exude simplicity and efficiency. The MFJ-1104 features a single input and three outputs, while the MFJ-1107 steps it up with one input and four outputs, providing an additional port for those who need a little more from their setup. Both are equipped with the popular Anderson Power Pole connectors, which are a standard for DC power distribution in amateur radio setups due to their reliable, quick, and secure connections that require no soldering.

The build quality of these devices impresses with their sturdy metal cases, which feel durable enough to withstand the rigors of portable use. Both are compact, ensuring they won’t hog space on your desk or in your mobile setup.

Technical Specs

Input/Output Connectors: Anderson Power Pole
Maximum Voltage: Up to 40V DC
Maximum Current: 30A total (MFJ-1104), 40A total (MFJ-1107)
Build: Metal case for durability
Dimensions: Conveniently compact

A Day in the Field with the MFJ-1104 and MFJ-1107

Let's imagine setting up for a Field Day, a highly anticipated event for ham radio enthusiasts. I’ve got a transceiver, a small amplifier, a digital mode interface, and an extra receiver. Here's where the MFJ-1104 and MFJ-1107 shine.

After setting up my tent and unpacking my gear, I connect my LiPo battery's output to the input of the MFJ-1104 and MFJ-1107. Instantly, I have seven available Power Pole outputs ready to distribute power. I connect my transceiver, amplifier, and digital interface to the MFJ-1104 and the extra receiver and other accessories to the MFJ-1107. The setup is clean, with no messy wires or the risk of loose connections.

Throughout the day, both power distributors handle the power management flawlessly. The voltage remains stable even as I push the limits of my equipment during peak operation. The convenience of having a single power point for multiple devices not only tidies up my station but also adds an extra layer of safety, reducing the clutter of cables and the risk of a short circuit.

Why the MFJ-1104 and MFJ-1107 are Must-Haves

For anyone who uses multiple devices in their ham radio operations, the MFJ-1104 and MFJ-1107 are game-changers. They’re not just about power distribution; they’re about organizing your space and ensuring that all your equipment receives a stable, reliable power supply. Whether you're at home, in a vehicle, or in the field, these power outlet strips simplify your setup.

Simplicity: No fussing with multiple wires or batteries.
Reliability: Secure connections that won’t come loose accidentally.
Portability: Small and lightweight, perfect for field operations.

In conclusion, the MFJ-1104 and MFJ-1107 Power Pole DC Outlets are more than just power strips; they are essential components of any well-organized ham radio setup. Their robust build, ease of use, and reliability make them excellent investments for both novices and seasoned hams alike. If you're looking to streamline your station and keep all your devices powered efficiently, these products should definitely be on your list.

73 en mooiloop,
73 and kind regards,

Marius Lubbe – ZS1ML
Chairman: Boland Amateur Radio Klub
www.bark.org.za

We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa.

05/01/2024

Unlocking the Classic Charm: Exploring the MFJ-553 Deluxe Wood Base Telegraph Straight Key



Author: Marius Lubbe ZS1ML

In a world where digital communication often reigns supreme, there's a profound beauty and nostalgia in returning to the roots of electronic messaging. This is where the MFJ-553 Deluxe Wood Base Telegraph Straight Key comes into play. As both an amateur radio enthusiast and a reviewer, I've had the distinct pleasure of exploring this charming piece of equipment, and I'm eager to share my findings with you.

Design and Build: A Nod to Tradition

Upon first glance, the MFJ-553 captures the essence of a bygone era with its exquisite wooden base and traditional design. The base is crafted from a beautifully polished wood that not only gives it a classic look but also provides a sturdy foundation for the keying operations. The hardware atop this wooden platform is equally impressive, featuring a solid metal arm and reliable mechanical components that promise durability and a pleasant tactile response.

The brass components are not just functional; they are a throwback to the days when craftsmanship was paramount. Operating this straight key is a tactile pleasure, with each depression of the key offering a satisfying mechanical click that is music to the ears of any Morse code aficionado.

Usability: Perfect for Beginners and Veterans Alike

One of the standout features of the MFJ-553 is its inclusivity. Whether you're a seasoned veteran of Morse code or a curious newcomer eager to delve into the world of amateur radio, this straight key is remarkably user-friendly. The key's action is adjustable, allowing you to fine-tune the travel and tension to match your personal preference, which is crucial for those long QSOs (conversations) or practice sessions.

For beginners, the simplicity of the MFJ-553 makes it an excellent educational tool. Learning Morse code can be daunting, but the straightforward design and the responsive feedback from the key make it an inviting and enjoyable experience. The accompanying 3.5mm plug ensures compatibility with a wide range of modern amateur radio equipment, allowing for easy integration into your existing setup.

Performance: Reliable and Responsive

In use, the MFJ-553 performs admirably. The key’s responsiveness is immediate, with no noticeable lag or inconsistency in contact closure, which is essential for maintaining rhythm and speed in Morse code transmission. This reliability not only makes it a joy to use but also instills confidence in its capability to handle whatever you throw at it, from casual practice to participation in high-speed Morse code competitions.

The acoustic feedback of the key strikes provides an additional layer of satisfaction and aids in the rhythmic flow of Morse code. This auditory cue is not only helpful for beginners learning timing and spacing but also for experienced operators who appreciate the sensory feedback during operation.

Conclusion: A Bridge to the Past, Tool for the Future

The MFJ-553 Deluxe Wood Base Telegraph Straight Key is more than just a piece of amateur radio equipment; it's a bridge to the past, offering a hands-on connection to the early days of electronic communication. It elegantly combines the aesthetics of the old with the functionality of the new, making it a captivating tool for anyone interested in Morse code and amateur radio.

Whether you're looking to dive into the world of CW (Continuous Wave) communication, seeking a reliable tool for your Morse code operations, or simply wanting to own a piece of history, the MFJ-553 stands out as a superb choice. Its build quality, ease of use, and excellent performance make it a delightful addition to any ham shack.

In essence, the MFJ-553 is not just about sending messages; it's about connecting with a hobby that spans generations and continents. It's about the joy of DIY, the thrill of communication, and the fun of mastering an art that, despite its age, has never truly gone out of style. So, whether you're calling CQ or just tapping out your first SOS, the MFJ-553 promises to be a faithful companion on your amateur radio journey.

73 en mooiloop,
73 and kind regards,

Marius Lubbe – ZS1ML
Chairman: Boland Amateur Radio Klub

www.bark.org.za

We serve a wide area including the Cape Winelands and Cape Town areas, of South Africa.