Shortwave listening and everything radio including reviews, broadcasting, ham radio, field operation, DXing, maker kits, travel, emergency gear, events, and more
I tried reverse-engineering- but I gave up. No numbers on IC-s. I found specifications for the analog switches (one for each band ) and found information about the transistors around those analog switch IC-s. Nice, 1 GHz fT transistors, all surface mount, so I gave up that line.
I found an NPN SM transistor in a damaged TV remote. It is only a 300 MHz transistor but
I had no better than that, so I started to build a little antenna amplifier circuit, wide band and simple.
I lost a few SM capacitors during the soldering but I have plenty of those. So the 1/4 square inch circuit board was finished last week. I tested it with an external 3 volt battery and I found it good working. Today ( 07-27-2019 ) I opened up the HRD-737 and wired it into the radio.
The results are much better than I expected. The HDR-737 became a good shortwave radio!
When I touch the built in antenna by my finger, radio is sensing the touch and station comes in. This effect was not there before. Radio became more sensitive on CB band than my Realistic DX392.
I have a YouTube channel [in the following video/slideshow] and I will show you the little ugly but great working circuit in the radio:
Later on next week I will try to record some video of the shortwave reception and post up it on the same YouTube channel.
I am a shortwave lover since 50+ years and I will be very happy to share the good news with others. Now I can listen my Greek music on this little radio, on 9420 kHz. Yes, the radio became [more sensitive than I had hoped].
You can see my other shortwave radios on my YouTube channel too, Have fun and never give up the hope!
Many thanks, Imre, for sharing and documenting this modification. One of the lessons here, too, is that if you have an inexpensive radio like the HanRongDa HRD-737 and you feel tempted to try a modification, there’s little to lose. It’s not like modifying a $1000 transceiver–just dig into the little radio and give it a go. If you harm the radio, you’ve only invested $37 or so in the project. That’s a much better solution than letting it sit on a shelf collecting dust because it’s not sensitive enough! Well played, Imre!
Many thanks to SWLing Post contributor, Harald Kuhl (DL1AX), who writes:
At the beginning of August there will be two special event amateur radio stations active on shortwave, celebrating anniversaries of famous European pirate stations Radio North Sea International and Radio Caroline:
2019 is the fifty fifth anniversary of Radio Caroline and the Martello Tower Group are pleased to be able to activate the world famous MV Ross Revenge again in August. This year we have been granted the ‘special’ special callsign of GB55RC. […]
Yesterday, I attended the WCARS hamfest in Waynesville, North Carolina, with my friend Sébastien (VA2SLW) who is currently on vacation in the area.
The WCARS hamfest is a smaller regional hamfest, but it attracts a lot of folks from the mountain regions of north Georgia, Tennessee, South Carolina, North Carolina, and beyond.
The WCARS hamfest flea market always has quite a variety of radios, including a number of great vintage models. I’ve been very lucky in the past finding excellent deals, too. This year, I (reluctantly) passed up a few deals knowing I’m also attending the Huntsville Hamfest in August and the Shelby Hamfest in September.
Below, you’ll find a selection of photos from the hamfest. Note that you can click on the image to enlarge it and I attempted to include price tags when possible:
Many thanks to SWLing Post contributor, Alexander (DL4NO), who writes:
Parallel to the Hamradio fair in Friedrichshafen, Germany, there are talks and whole conferences. Over the last years, the “Software-Definded Radio Academy” (SDRA) was one of them.
Encore – Classical Music on Shortwave – Broadcast on Sunday afternoon in Europe and USA
Encore – Classical Music this weekend is being broadcast as usual by Channel 292 (Europe) on 6070 kHz at 15:00 UTC Sunday 26th July.
And by WBCQ on 7490 kHz at 00:00 – 01:00 UTC Monday 27th July.
There is a repeat on 6070 kHz on Friday 2nd August at 19:00 UTC.
This week’s show starts with the overture from the Marriage of Figaro, then a slightly off-piste treat sung by two jazz legends – lifts the hairs on your arms. The whole of a Beethoven string quartet. Then some Buxtehude organ music, some Barbara Strozzi, and lastly a Swedish Rhapsody by Hugo Alfvén.
Both Channel 292 and WBCQ do live streams if the reception is poor in your location. Easy to find their sites with a google search.
Thank you for spreading the word about Encore – Classical Music on Shortwave. And thank you to everyone for letting us know how well/badly the signal is received where you live.
Brice Avery – Encore – Radio Tumbril.
Regular Broadcast times are:
15:00 – 16:00 UTC Sunday, and repeated 19:00 – 20:00 UTC Friday on 6070 kHz (Channel 292 Germany).
00:00 – 01:00 UTC Monday on 7490 kHz 9WBCQ – Maine).
If you’ve been looking for a super-basic, AM/FM portable radio, the RF-2400D is worth considering. The RF-2400D reminds me of the Sony ICF-38: slide rule dial, few controls and a power cord that plugs directly into the back (no “wall wart” style power supply needed). Like most modern portables, the 2400D is a DSP receiver, thus subject to “steps” as you band scan across the analog dial. It’s all pretty smooth, though and feels like an analog radio. I have spent a little time with the RF-2400D and thought it to be a pleasant, little simple radio. It’s not a DX machine, but can easily receive all of your local stations and night time flame throwers.
I often receive inquiries from readers who are seeking a simple radio for an elderly friend or relative–one that’s tactile, easy to operate, and affordable. The Panasonic RF-2400D fits the bill!
Halley VI Research Station on the Brunt Ice Shelf in Antarctica (Source: British Antarctic Survey)
On Friday, 21 June 2019, the BBC World Service officially transmitted the 2019 BBC Antarctic Midwinter Broadcast–an international radio broadcast intended for a small group of scientists, technicians, and support staff who work for the British Antarctic Survey.
This is one of my favorite annual broadcasts, and I endeavor to listen every year. Once again, the SWLing Post called upon readers to make a short recording of the broadcast from their locale.
Below are the entries, roughly organized by continent and country/region. We had a total of twenty seven recordings submitted from all seven continents this year–simply amazing!
Putting this post together takes almost a full dedicated day sorting recordings and formatting them for the Post. If I’ve somehow missed including your entry, please contact me; I’ll amend this post.
So, without further ado we begin with a recording made in Antarctica at Germany’s Neumayer-Station III:
The 2019 BBC Antarctic Midwinter Broadcast Recordings
Antarctica
Neumayer Station III, Antarctica
SWL: Andreas Mueller, DL3LRM Location: Neumayer-Station-III, Antarctica Notes:
Hello Thomas,
Cheers from Antarctica, I am the radio operator and electronic
engineer of the 39th overwintering team at Germany’s Neumayer-Station
III. Thanks to your blog and post on Facebook I got aware of the
annual BBC broadcasts to Antarctica, and was able to sneak away from
the festivities to enjoy these 30 minutes. And would like to provide
a recording as requested by you.
SWL report by Andreas Mueller, DL3LRM
Location: 70°40’S, 008° 16’W, Neumayer-Station-III, Antarctica
Equipment: Yaesu-450D, Commercial Broadband Dipole 2x35m
The recording is about two minutes long, first 30 Seconds on 5875kHz,
then I switched to 7360kHz and remained there for the rest of the
show. I also have my little FT-817 running as a backup and control
unit, and it also confirmed that 7360kHz was the best frequency, with
S7 to S8 Signal strength, and some fading now and then. 5875kHz was
about S5, and I cannot remember hearing anything on 9455kHz, but I
have to admit that I checked that frequency only briefly.
Thanks again for bringing that broadcast to my attention, it really
was a special treat for me on that day.
SWL: Vermont M. Coronel Jr. Location: Manila, Philippines Notes:
Recording of the 2019 BBC Antarctic Midwinter Broadcast. Signal was, I believe coming in from Ascension Island. Signal was very weak since the Sun was already above the horizon at the time of broadcast. I continued to listen for a few minutes and towards the end of the broadcast. I heard greetings from the relatives of those who are currently stationed in the Antarctic. This is a once a year special program to the scientists and support staff in the British Antarctic Survey Team. Received in Quezon City with a 45 foot antenna. -Vermont
Ciao Thomas, I am Davide Borroni from Italy my city is Saronno . I send you my videos, made with my receivers: R&S EK 56, Siemens E401 and R1251. The signal on all three frequencies was excellent here in Italy. As an antenna I used a magnetic loop of 2 meters in diameter.
I hope you like my videos
73s
Very good signal to all frequency + 20 Db !
Utc Time 21.30-20.00
Frequency 7.360-5.875-9.455
Setup: Rx jrc nrd 91, jrc nrd 545 dsp, WJ 8718-9, antenna loop Wellbrook ALA 1530.
Rx Marconi Marine Apollo and Zeppelin antenna 16.2 Mt.
[L]istened to the programme bbc antarctica on 5875 khz and 7360 khz sinfo 54554 both using a sangean ats 818 with a 27 metre antenna long wire. good job and wonderful broadcast. Sending mp3 recording.
Greeting from Malta
Adrian swl 9H4001SWL
Portugal
SWL: Nuno Oliveira Location: Santarem, Portugal Notes:
This is the video from Santarem, Portugal with the 3 frequencies.
The first video is a Tecsun PL-880 with a 1 meter aluminium rod outside and 12 meters of RG58 coax.
Here is a link to my youtube recording of this years BBC Antartic Midwinter broadcast.
All three signals were good readable at my location in Scotland.
The best reception I got was from Ascension Island on 7360 AM, as there was Ute QRM on 5875.
Details of my RX etc are on the youtube video.
Thanks again,
Regards and 73,
Steven
SWL: Richard Langley Location: Hanwell, New Brunswick Notes:
I obtained a good recording of the BAS broadcast here in New Brunswick, Canada, on 9455 kHz using a Tecsun PL-880 receiver outdoors at my house with a Tecsun AN-03L 7-metre wire antenna strung to a nearby tree. Attached is a two-minute clip from the start of my recording. Also attached is a photo of the “listening post” at the back of my mosquito-infested backyard. Note the mosquito on the protective box housing the receiver and recorder!
https://youtu.be/3rGxxBMWiVw is “49 seconds of the 2019 BBC Antarctic Midwinter Broadcast as received at WA1LOU in Wolcott, CT, USA using an ICOM IC-R8600 receiver and Hy-Gain 18 AVT/WB-A vertical antenna. I programmed the four frequencies that were originally announced for the broadcast into the IC-R8600, but learned afterwords that only three were used (5875, 7360, 9455). I had solid copy on 9455 throughout the broadcast. 7360 had a lot of fading, but was still fair copy throughout the broadcast. 5875 was very poor copy during the last 10 minutes; there was no copy for the first 20 minutes.”
SWL: Bob (W2RWM) Location: North Babylon, NY Notes:
Receiving frequency was 7360 kHz. 5875 had a continuous buzz, 9455 was fading in and out too much to understand.
Location is on North Babylon, NY, USA
Equipment is a Yaesu FT-950 and an HyEndFed 80-10 meter antenna oriented North and South.
SWL: Don N7DCP Location: South Africa (remotely controled from Idaho) Notes:
This is Don, I am in southwest Idaho. Could only hear a slight carrier locally on 9455 MHz. So used a remote SDR in South Africa to record the audio file. Thanks and 73!
The GE 7-2990A (left) and Panasonic RF-B65 (right)
SWL: Thomas Witherspoon K4SWL Location: Asheville, North Carolina Notes:
Out of the the three Midwinter Broadcast frequencies (5875, 7360, and 9455 kHz), I could receive the 7,360 kHz signal from Ascension Island best.
SWL: Chris Mackerell Location: Marahau, New Zealand Notes:
Here’s the first minute of the 2019 BBC Antarctic Midwinter Broadcast as heard here at my home in Marahau, New Zealand.
5875 is in USB to avoid the Stanag signal nearby, the others in Synchronous AM mode.
All three were easily readable here for the entire broadcast.
All received using the same Elad FDM-DUOr receiver & Wellbrook loop antenna.
South America
Brazil
SWL: Rodrigo de Araujo Location: Belo Horizonte, Brazil Notes:
How are you? I’m PY4004SWL (Southeast Brazil).
For the first time I tried to listen to the BBC Solstice broadcast to Antarctica and it worked. The only problem is that I wrongly noted the 7350 frequency and with that I lost the Ascencion transmission in 7360, certainly the one that was best heard by the SWLs in my region. Still, I got “taped” 5875 and 9455, the latter with better results. I hope my recordings are useful to those who study propagation.
I have used two radios and 2 kinds of antennas that can be seen and a telescopic as well.
SWL: José Roberto da Silva Cunha Location: Governador Valadares, Minas Gerais, Brazil Notes:
Geographical coordinates:
18 58´45´´ S
41 57´ 30´´ W
Grid locator: GH91ad
With the inclusion of Antarctica, this is the first year we’ve been sent reports from all continents! Amazing!
Once again, many thanks to all of you who submitted your recordings of the BBC Midwinter Broadcast!
We’ll be sharing this post with both the British Antarctic Survey and the BBC World Service. And to all of you, from the SWLing Post: Happy (Belated) Midwinter! Happy Summer/Winter Solstice!
