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.