Ivan compares the AirSpy HF+ to the KiwiSDR

Many thanks to SWLing Post contributor, Ivan (NO2CW), who writes:

I have been running a public Kiwisdr server for a while and yesterday decided to plug in the new Airspy HF + into the same antenna for a side to side comparison. The antenna is an 80m dipole and the test was done during local afternoon, around 3 PM. I did not use any of the many new noise reduction features that are incorporated into both SDR Console 3 and the SDR web server. The 11 minute video is located here:

Click here to view on YouTube.

When I have the time I will run a similar test in nighttime conditions and also test the Airspy HF+ against a few other radios sitting on my desk.

Thank you for sharing this, Ivan!

Spread the radio love

A photo tour of the 2018 Greenwood, SC hamfest

Last week, my buddy Vlado (N3CZ) informed me about a small hamfest in Greenwood, SC–I had never attended, but had heard positive comments about it.

I believe Vlado was somewhat on the fence about going, but once I expressed a strong interest in selling some gear, he did too so it quickly became a plan!

Greenwood, South Carolina, is about a 2.5 hour one-way drive from my home. Vendors were encouraged to arrive around 7:00 to set up (general public admission was at 9:00), so Vlado and I hit the road by 4:30 AM!

Notice the lack of traffic on the interstate at 4:30 AM!

We arrived as the doors opened and purchased a total of three tables to sell our gear. My goods took up most of one table and Vlado packed the other two with his gear!

By general admission time, less than half of the vendor tables were occupied, which did worry me. However, overall foot traffic wasn’t bad at all! This vendor was certainly pleased.

I sold at least 80% of the items I brought with me, no doubt due to my generous and agressive pricing scheme (i.e. nearly giving things away–!). Vlado sold some large items, too.

In the end, I didn’t purchase a single item at the hamfest. I was in selling mode, not buying mode, at this hamfest as I’ve been making an effort to downsize some of my collection and use the money to offset the costs of travel this year. With that said, I would have snagged a classic portable had one appeared.

This BC-317 is just asking to be taken home!

Mind you, I was very tempted by two BC-317 receivers being sold together for an asking price of $60, but I resisted as the whole idea of “thinning the herd” is to make room in my small radio shack.

I find that small hamfests like Greenwood actually have better vintage radio pricing than the larger ‘fests.

Greenwood Photo Gallery

Though the hamfest was modest in size, there were quite a few quality offerings among the vendors. I was very impressed with the number of transceivers–indeed, a new ham would have had a selection of affordable benchmark 90s era rigs to choose from!

Click on the thumbnails below to enlarge or comment on the photos. Most of the photos were taken prior to the doors opening but I did my best to capture price tag information if available:

Do I plan to revisit Greenwood next year? You bet!

Spread the radio love

Atlantic 2000 special broadcast today from Red Lion, USA

(Source: Mauno Ritola via WRTH Facebook)

Atlantic 2000 will be on the air this Sunday 14th of January, with a special broadcast transmitted from Red Lion in the USA via WINB.

We will be on the air from 21:00 to 22:00 UTC on 9265 kHz with a power of 50 kW.

Our webstream will be active at the same time :
http://radioatlantic2000.free.fr

Reports to : [email protected]

Good listening !

Spread the radio love

Radio Deal: Herrington discounts Grundig radios 40%

Many thanks to SWLing Post contributor, Dennis Dura, who notes that online retailer Herrington is promoting a 40% off sale on all of their Grundig radios.

Some excellent prices here:

Thanks for the tip, Dennis!

Spread the radio love

Make your own 3-D printed crystal radio

(Source: Southgate ARC)

Did you know you can build your very own working 3D-printed radio – without any soldering, electronics experience, electric cord, or even batteries?

Digital Trends reports that’s exactly what talented Houston, Texas-based 3D-printing and electronics enthusiast Sage Hansen has created. And he’s willing to show you how to do it, too.

Called a crystal radio receiver, or sometimes a “cat’s whisker receiver,” this is an incredibly simple type of radio receiver that was popular in the earliest days of radio. The only power it requires to work is the received radio signal, which is used to produce sound. It is named after its most important component, the crystal detector or diode.

“AM radio was one of the first ways of transmitting audio to a very broad audience in the early 1900s, but it is still very popular today,” Hansen told Digital Trends. “It starts with the radio station converting their audio sound waves into electromagnetic waves, which can travel great distances.

Each radio station uses a specific frequency that is constant, but the sound waves are mixed so they amplify and modulate the base radio wave. What makes the crystal radio so exciting is how simple the circuit is, and how it can be made out of normal household items.

Watch the video and read the full story at
https://www.digitaltrends.com/cool-tech/3d-printed-working-radio/

Spread the radio love

Dean seeks input for his holiday radio adventure

Many thanks to SWLing Post contributor, Dean Denton–our intrepid 13 year old DXer–who seeks a little input from the community. Dean writes:

I am going on holiday in July this year, to Fuerteventura in Islas Canarias, near west Africa.

This will be the first time I will be going on holiday, you will probably know the feeling. Because I am a hardcore radio-fan, I will of course bring my Tecsun PL-660, and I will be posting clips on my YouTube Channel, EuropeDX.

Please could you give me, some vital tips when going on holiday when DXing?

The Canary Islands are in close proximity to North West Africa, so I will be DXing: Morocco, Mauritius, Algeria, Western Sahara, Senegal and others.

To those who are reading this post, I am compiling a list of tech that I am bringing with me. Please help add to this list, off of your experience of being abroad.

Here is the list:

  • Shortwave Radio, Tecsun PL-660, for the immersion.
  • Tecsun AN-200 Loop antenna, for pulling AM stations.
  • Travel adapter, we all need one.
  • Portable MP3 player, to listen to music
  • A Portable Digital TV, for watching movies on USB.
  • An action camera w/lapel microphone, for capturing videos.
  • FM Transmitter, to show the locals what music is!
  • 4G Mobile Data Router, internet is a basic human requirement.

Please suggest more!

I think that the AM and FM DXing will be breathtaking. The Canary Islands are located where I will be able to pick up African radio stations, but also Transatlantic Brazilian and American stations. Due to the high pressure and high temperature, FM Tropo is not rare in the Canary Island’s climate. Enabling this, it will spark my YouTube channel.

Thank you for reading this, and I hope the SWLing community help me. If you would like to contact me, email me at europedx(at)gmail(dot)com.

Yours,

Dean.

Thanks, Dean! You’re talking my favorite topics: radio and travel!

I know we have a number of readers who live in the Canary Islands.  No doubt, you’ll get to experience some serious radio fun across the bands.

In terms of tips, I would suggest you assume your accommodation could be plagued with radio noise and you may be forced to find an outdoor spot to do all but your FM DXing. If you know where you’re going to stay, check it out on Google Maps and see if there’s an obvious safe spot to play radio outdoors. Of course, it helps if your accommodation has an outdoor space like a balcony, patio or garden.

Looks like you’ve got a pretty good checklist there. Here are a few additional items I typically take on a holiday DXpedition:

  • Earphones/Headphones (never leave home without them!)
  • A small back-up radio (if you have one–something like a Tecsun PL-310ET)
  • A copy of the World Radio TV Handbook (though I don’t take the WRTH if space/weight are too tight–I rely on apps with offline schedules like Skywave Radio Schedules [Android] or Shortwave Broadcast Schedules [iOS])
  • Extra set of AA batteries for the PL-660
  • Small headlamp or flashlight for night time outdoor listening
  • Notepad and pencil for logs

SWLing Post readers: How do you plan and what do you take on radio holidays? Please feel free to comment and share your advice!

Spread the radio love

Georges’ review of the XHDATA D-808

Many thanks to SWLing Post contributor, Georges (F6DFZ), who writes:

After the first information from your wonderful website, I immediately ordered the XHDATA D-808 receiver from Aliexpress for €62 including shipment to France.

I got it very quickly, shipped from Amazon UK!

I did a few tests on SSB. MDS is outstanding, the minimum signal from my HP generator at -127 dBm (0,1uV), is strong even on 28 MHz. Selectivity is also good, and the opposite sideband rejection is audibly also good. However I was unable to measure it because the S meter give the same indication over a few kHz around the signal of the generator. I suspect the opposite sideband rejection to be done by the DSP chip at AF, but I cannot confirm this.

Reception is very good on FM, and the AF from the loudspeaker is reasonable. On headphones, it’s very good. RDS works as it should and sets the clock of the receiver.

I did only a few minutes test on LW and MW, and it seemed OK, even if I don’t have a lot of experience on these bands.

SW AM listening was very good; good audio, great selectivity. I suspect that the bandwidths given are AF bandwidths as even the most selective were not too much muffled. If it was IF selectivity, the AF bandwidths would have been half the values and much muffled.

SSB and CW reception are also very good even if the DSP chip has a long attack time and hence gives distortion during the beginning of each message.

About SSB: I think that this receiver is better than the [Tecsun] PL-880 and comparable to the PL-660.

Reception is good on the short but sturdy telescopic antenna.

If you connect the receiver to a large external antenna, you will encounter many IMD signals. As there is no built-in attenuator, you will need an external one.

The manual is correct, but very short about the memories.

ATS logs its findings into the first pages, so if you want to keep some memories, log them a few pages away.

The available pages are different with bands, FM has its pages, SW its pages etc…

Unfortunately, memories don’t keep the mode on SW–only the frequency and selectivity. After calling a memory, you will have to choose between AM, USB and LSB.

I was totally unable to light the “Preset” label on the display ?!?

Display and backlighting are very nice.

Somewhat odd, but the squelch seems to work sometimes on other bands than Air band !

Ergonomics are reasonable, quality of construction is good for the price.

Overall, for the price, this receiver is quite outstanding.

Best regards from France .

Georges F6DFZ

Thank you, Georges! Excellent thoughts on the D-808.  Your note about squelch control working outside the AIR band reflects what the Digitech AR-1780 does as well–hinting that firmware is very similar.

I fully suspect the D-808 is on the path to being one of the best radio values under $100 US.

Merci bien, Georges!

Spread the radio love