Category Archives: Shortwave Radio

Check out the new web-based KiwiSDR in New Zealand

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Kiwi-SDR-1

Many thanks to SWLing Post contributor, Andrea Borgnino, who shares a link to a new web SDR in New Zealand: The KiwiSDR installation.

Andrea posted the following on Twitter:

I agree with Andrea: this WebSDR has an amazing display and user interface. It even includes both a spectrum and full-color waterfall.

I’ve enjoyed tuning around the mediumwave band in New Zealand this morning. My Internet connection is terribly slow (and unreliable) but I was still able to view the full display while streaming audio with only a few hiccups.  With a moderately robust Internet connection, I believe you’ll be pleased with the KiwiSDR.

Click here to visit the KiwiSDR online.

Many thanks, Andrea, for the tip!

The Mighty KBC is seeking sponsorship

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DX-402-KBC-2

Many thanks to SWLing Post reader, Mike Nikolich (N9OVQ), who writes:

Hi, Tom:

Uncle Eric mentioned [this past weekend] on The Mighty KBC (6040 kHz) around 0145 UTC that they will be leaving the airwaves if they cannot attract enough advertising revenue.

I would really miss this radio station if it left the air. 

[…]I’m sure Kenwood, ICOM, Ham Radio Outlet and C Crain have enough discretionary funds to advertise on this station and I can’t imagine a more targeted ad buy for shortwave listeners than The Mighty KBC.

Thanks for the message, Mike! Yes, I would also miss The Mighty KBC if they left the air–their music program, “The Giant Jukebox” is one of my favorites.

If you have any sponsorship leads or ideas, please contact The Mighty KBC via their website.

Paul schedules new shortwave broadcasts via WRMI, WBCQ and Channel 292

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SP600Dial3

Many thanks to SWLing Post reader, Paul Walker, who writes:

I will be doing another broadcast on Shortwave and it’s going to be even bigger and better right now.

Tentatively, this is how the broadcast schedule times/frequencies work out to be:

  • WBCQ 5110khz and 9330khz Friday March 11th, 2016
    10pm to 12midnight Eastern (which is 0300 to 0500 UTC Saturday March 12th)
  • WRMI 11580khz Thursday March 10th, 2016 Thursday March 10th, 2016
    8pm to 10pm Eastern (which is 0100 to 0300utc on Friday March 11th)
  • Channel 292, 6070khz (Germany transmitter site) Friday March 110th, 2016
    10pm to 12midnight UK time (which is 5pm to 7pm eastern, not that Channel 292 can be heard in the US… just giving you a frame of reference)

I am in the process of booking all this time, so something could change in terms of times/dates between now and the broadcast dates.

I’ll be doing 2 hours of rock n roll and country music .. no commercials, no pleading for money, no asking for donations.. just me, playing the music I like.. because. well I want to and I can.

I’m paying for time on all 4 of these stations out of MY OWN POCKET, again for no reason, other then I want to.

So many complain about what radio lacks, wether am, fm or sw and lament about the old days or suggest what would work today.. but want it done with other people’s money.. they won’t put up and shut up. What I do won’t change radio or make much of a difference in the grand scheme of shortwave radio, but I can have fun and share my love of radio and music with others.

I am trying to secure an hour or two on a United Kingdom area AM station as well if it is affordable and I can find one to sell me time.

Writing to you from an apartment only 500 feet from the frozen Yukon river in Alaska’s interior region.

Excellent news, Paul! Please keep us informed as I’m happy to post any updates you may have. We’ll be listening!

China Radio International’s overwhelming AM bandwidth via Havana

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Scott-Marine-SLR-M-Dial

This morning, I listened to Radio Australia on 9,580 kHz with my WWII era Scott Marine Radio SLR-M (above).

Radio Australia provides a reliable, strong signal into North America every morning and it’s where I typically tune for the morning news at the top of the hour.

China Radio International also fires up on the adjacent frequency of 9570 kHz around 1200 UTC–their signal is also incredibly strong here as it’s relayed from Radio Havana Cuba at 250 kW. CRI’s bandwidth is almost always wider than 10 kHz–indeed, it’s often 20 kHz–which means that it completely wipes out any average adjacent signal.

Indeed, when I’m testing selectivity on portable shortwave radios, I’ll often tune to Radio Australia and wait for CRI to fire up on 9570 kHz. If the portable radio can still lock onto Radio Australia after CRI is on the air–or, better yet, if an upper side band sync lock can eliminate all traces of CRI–I know the receiver has decent selectivity.

This morning, when CRI began transmitting at 1200 UTC, their signal completely wiped out every trace of Radio Australia. Though the SLR-M’s narrow AM filter is still quite wide, it can typically cope with the adjacent CRI carrier.

I fired up the TitanSDR to see what CRI’s signal looked like on a spectrum display–here’s what I found:

China-Radio-International-Bandwidth

CRI’s AM bandwidth was 30+ kHz wide! 

In my book, that was an abusive use of the band.

This was, by no means, an isolated event. It was just particularly annoying for me this morning as I was enjoying a good cup of coffee and the morning ABC news.

I’ll send a message to CRI and RHC about this, but I have my doubts anyone will take action.

Okay–sorry about the rant!

Listening to the Voice of Greece on the Signal Corps BC-348-Q

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SignalCorps-BC-348-Q

Yesterday evening, I warmed up my Signal Corps BC-348-Q and tuned to 9,420 kHz to see if the Voice of Greece happened to be on the air.

Fortunately, I was rewarded with a strong signal from Avlis.

The ‘348 did a fine job playing all that lovely Greek music, too. Though the WWII era ‘348 was never intended to be an HF broadcast band receiver, when paired with a good speaker, it sounds pretty darn amazing!

Here’s a short video (apologies for the dark image):

1944 WWII Hallicrafters Shortwave Radio Promo

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WWII-HallicraftersInteresting 15 min. video demonstrating the Army Signal Corps using an Hallicrafters SCR-299.

While certainly a promotional piece for Hallicrafters, this has great footage and captures a bit of the excitement of radio expanding into new frontiers. There is a discussion of how the radio was modified for military conditions as well as some innovations which were implemented to make such a system mobile.

As an aside, it never ceases to amaze me how clear and crisp black and white film technology of the time seems somehow better than the color images which replaced it. But that may just be me — a black-and-white guy living in a colorized world!

There is a second part to this video, as well as other WWII-era videos available on YouTube with a bit of searching, and of course don’t forget to check out the SWLing’s Shortwave Radio Archive page for more interesting shortwave audio old and new!

Robert Gulley, AK3Q, is the author of this post and a regular contributor to the SWLing Post. Robert also blogs at All Things Radio.

The Xiegu X5105: a new QRP portable transceiver in development

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Xiegu-X5105

Many thanks to SWLing Post reader, Mike, who writes:

I thought your readers might like to know about the new Xiegu X5105 [HF] transceiver which is being developed by the Wouxun group out of China (the same company who produces an inexpensive line of amateur HTs).

According to YaesuFT817.com, the X5105’s receiver is a double-conversion superheterodyne design and is made portable by way of 3 rechargeable lithium batteries of 1.8 mAh each. Native output of 5 watts.

I’ve read that the price will be around $500 US.

The X-108 forum also has the following message, I assume, from a company representative…

“Xiegu Tech will launch new products. I’m very pleased to share relevant information with you:-)

I. X5105 short wave transceiver

  • X5105 is a highly portable transceiver working at HF+6m band, with a built-in power output of 5W.
  • Technical features: double-conversion superheterodyne, fitted with up to 3 lithium batteries of 18,650mph each.
  • Expandability
  • A standard main unit (embedded with one 8-pole 2.7k-SSB crystal filter)
  • An optional high stability, high precision TCXO module
  • An optional 500Hz narrow band crystal filter
  • An optional plug-in 5W antenna tuner module

II. XPA125 integrated amplifier and antenna tuner

  • XPA125, with a built-in antenna tuner, amplifies the output up to 125W.

Technical features:

  • 125W linear power amplifier + combined LC antenna tuner.

Expandability: 

  • A standard 125W amplifier, An optional 125W automatic antenna tuner.”

Thanks for all of the info, Mike!

That’s an interesting portable design. I like the display–reminds me of the Icom IC-746.

I’ll be very curious how well it performs as a general coverage receiver. I don’t see any specs regarding AM mode or the maximum bandwidth. The price is certainly competitive; nearly half that of the Elecraft KX3. I seriously doubt it could give the KX3 a run for its money, performance-wise, but who knows? Looks like we’ll have more info by the end of the year when the X5105 hits production. Thanks again for the tip!