Tag Archives: Rob Sherwood

Radio Waves: Holme Moss Transmitter, Sherwood Tools, World of LPFMs, Shortwave Revival Response, and Russia “Thrown Back 40 Years”

Radio Waves:  Stories Making Waves in the World of Radio

Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!


Holme Moss transmitter (BBC Archives)

A look at how the BBC’s third television transmitter in West Yorkshire was built.

These original masts broadcast to the surrounding population until 1985, when they were replaced by a new generation of transmitters.

Originally broadcast 12 October 1951

Click here to watch the video at the BBC Archives.

Sherwood Tools Available (K4FMH Blog)

The work that Rob Sherwood NC0B has contributed to the public over the past decade is unique and an amazing service to hams worldwide. I’m talking about, of course, his summary Table of receive bench tests published at this Sherwood Engineering website. He is independent so no one can think that advertising dollars could skew his assessments or how he presents them. As a CW contest operator, he is very clear that he sorts his table on the basis of what his experience and training has shown him to be the single most important measurement in his table: the narrow dynamic range.

I am not a CW operator or accomplished contester (lol) but enjoy the latter with my small team of fellow hams. But I am a statistician who likes to focus on problems where analytic tools can help foster a wider understanding of the data surrounding the problem area. So, working with Rob NC0B, I’ve created a set of “Sherwood Tools” to visualize his data as well as link them to a couple of other critical aspects of a rig purchase: market-entry price, consumer satisfaction, and the year the radio entered the market. These four vectors of data drive all of these tools, now available over at foxmikehotel.com.

The tools include a sortable Sherwood list where you can sort on any of the nine tests he publishes as well as the composite index of them that I created and included in my two-part NCJ articles in 2021. A set of 3D data visualizations are available to simultaneously view radios on four data elements (that does make it 4D, technically). Several graphs illustrate key aspects of the data, including how to not get tripped-up in the “ranking” of radios where the bench measurements are just not appreciably different. Seeing how the past 50 years of radios appearing in Rob’s Table have made a remarkable and clear progression toward the best receiver performance that modern test equipment can detect is in another tool. In addition, how the trend in getting a receive bang-for-the-buck has progressed over this 50 year period is there, too. Finally, I’ve used the industry-standard tool by Gartner, the Magic Quadrant, to help isolate radios in Rob’s Table that perform and are rated above average at various price points. I call these the Golden Quadrant Lists. Continue reading

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Rob Sherwood tests the new Yaesu FTDX10

Many thanks to Rob Sherwood (NC0B) who shares his recent assessment of the new Yaesu FTDX10.

In short: the FTDX10 is now number 3 (at time of posting) on Rob’s receiver test data table— a table sorted by third-order dynamic range narrow spaced. Most impressive!

Click here to download Rob’s full HF test results and his review notes as a PDF.

FYI: I plan to review the FTDX10 this year.

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Rob Sherwood on Ham Talk Live tonight (October 29, 2020)

I just discovered Rob Sherwood (NC0B) will be on Ham Talk Live tonight. Rob always has fascinating comments about receiver performance, so this should be a great episode.

Here are details:

Rob Sherwood, NC0B from Sherwood Engineering returns to Ham Talk Live! Thursday night to talk about the performance of several radios since his last visit on this show and will take your questions live about his analysis.

Tune into Ham Talk Live! Thursday night at 9 pm EDT (Friday 0100Z) by going to hamtalklive.com. When the audio player indicates LIVE, just hit the play button!

If you miss the show live, you can listen on demand anytime also at hamtalklive.com;

or a podcast version is on nearly all podcast sites a few minutes after the live show is over. Some sites include Apple Podcasts, Stitcher, Google Play, SoundCloud, and iHeart Podcasts; and it’s also available on YouTube. A replay is also broadcast on WTWW 5085 AM on Saturday nights at approximately 3:30 pm Eastern.

Be sure to CALL in with your questions and comments by calling 859-982-7373 live during the call-in segment of the show. You can also tweet your questions before or during the show to @HamTalkLive.

Thursdays at 9 pm Eastern (Friday 0100Z Mar-Nov / 0200Z Nov-Mar) Live call-in talk radio show about Amateur (Ham) Radio – Hosted by Neil Rapp, WB9VPG Call 859-982-7373 to join the conversation!

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Rob Sherwood’s presentation: “Transceiver performance for the HF/DX operator”

Many thanks to SWLing Post contributor, Paul, who shares the following video of a recent presentation by Rob Sherwood (NC0B) for Ham Holiday Oklahoma.

I love Rob’s presentations because not only is he an authority on testing receivers and transceivers, but he also has a very pragmatic approach to operating radios. Rob speaks to the importance of using pre amps, attenuators and adjusting your receiver for band conditions. I’ve been with lifelong ham radio operators and SWLs who never use pre amplification, attenuation, or adjust their RF gain control–these are very powerful tools, especially during the noisy summer months.

If you’ve never seen one of Rob’s presentations before, I highly recommend checking out this one:

Thanks again for the tip, Paul!

Click here to check out Rob Sherwood’s home page and receiver test data table.

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Icom IC-R8600 added to Sherwood’s Receiver Test Data Table

Icom IC-R8600

Rob Sherwood, at Sherwood Engineering, has now published test results of the Icom IC-R8600 wideband receiver. The IC-R8600 is (impressively) second from the top of the list sorted by third-order dynamic range narrow spaced if phase noise limited:

Click here to view the full list at Sherwood Engineering.

Click here to check out Dan Robinson’s recent review and benchmark receiver comparisons with the IC-R8600.

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