The Knitted Radio: An FM radio transmitter sweater

Many thanks to SWLing Post contributor, Paul, who shares a link to this fascinating maker/art piece from designer Irene Posch:

The Knitted Radio is an installation piece that manifests how to knit a sweater that is also a FM radio transmitter. The tactile centerpiece is a functional electronic object knitted out of ordinary wool and commonly available conductive materials. The accompanying knitting instructions, to be published in a knitting magazine, allows the reproduction of the electronic object by an alternative maker group.

The piece is part of a larger investigation into using traditional textile crafting techniques to create electronic components and devices from scratch. The critical question is whether ‘what’ one makes is really more important than ‘how’ one makes things. Industrial technology research is mostly driven by the desire to invent the next killer application, whereas artistic research holds the chance to question implications. By exploring alternative production procedures, we might be able to reveal skills, techniques and materials that have been uncharted, undervalued, or decisively left out of popular demand.[…]

Click here to continue reading and to check out other works by Irene Posch.

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Radio Prague QSL cards highlight Czech architecture

Many thanks to SWLing Post contributor, David Iurescia (LW4DAF), who writes:

I send you this link about Radio Prague´s QSL Cards for the present year.

They have images of modern architecture from Czech Republic:

Check out the full set of Radio Prague QSL Cards by visiting Radio Prague online.

Thanks for the tip, David!

Note that although Radio Prague officially left the shortwaves in 2011, they can still be heard via a WRMI relay on 9955 kHz:

  • 02:00 UTC (Monday – Friday, Sunday)
  • 10:00 UTC (Monday – Friday)
  • 12:00 UTC (Monday – Saturday)

For those readers in parts of the world that can’t easily tune into the WRMI relay, note that Radio Prague also sends QSL cards for Internet Radio reception reports.

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Video: “The Fort and the Field Day”

Many thanks to SWLing Post contributor, Dennis Dura, who shares a link to this short video highlighting amateur radio at the 2017 Fort Wayne Field Day:

Click here to view on YouTube.

YouTube description: A 10 minute documentary investigating why people still do ham radio. Shot at the Historical Fort Wayne in Fort Wayne, Indiana, during ARRL Field Day in 2017.

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World Radio Day and special broadcast by Sveriges DX-Forbund

Many thanks to SWLing Post contributor, Harald (DL1ABJ), who writes:

Just noted that SDXF (Sveriges DX-Forbund) on 13 February will have a program via Channel 292 on 7440 kHz from 0800 UTC and again from 1300 UTC.

Each year on February 13th UNESCO celebrates World Radio Day (WRD).

The WRD 2019 website will give more information about this years event in around two days from now:

https://www.diamundialradio.org/

Many thanks, Harald, for spreading the word! World Radio Day is a great reminder of how important radio still is in many parts of the world.

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A new portable DRM/DAB receiver by Starwaves GmbH

Many thanks to SWLing Post contributor, Mangosman, who notes:

There is a new digital receiver available. It can receive DRM in all bands from low, medium, high and band 1 & 2 VHF, as well as DAB+ and analog AM and FM.

It cannot receive HD radio because Xpedia charge licensing fees on every receiver and the market is restricted to USA and Mexico.

https://www.alibaba.com/product-detail/DRM-DAB-Digital-Radio-Receiver_11547499.html

Thank you for the tip!  It appears this receiver is a product of  STARWAVES GmbH, Germany/Switzerland, although I assume it’s manufactured in China based on the bulk order costs.

I’ve reached out to the manufacturer for more details as there are few specifics and no specifications on the Alibaba page.

There are also no details about this radio on the Starwaves website.

If/when we receive more information about this radio, we’ll share it here on the SWLing Post. Stay tuned!

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Mark your calendars: WWV Special Event Amateur Station Sep 28 – Oct 2, 2019

WWV building in Fort Collins, Colorado (photo courtesy: NIST)

(Source: Dave Swartz, W0DAS)

NCARC WWV Committee
Fort Collins, Colorado:
FOR IMMEDIATE RELEASE – JANUARY 11, 2019

WWV Centennial Celebration and Special Event Amateur Station September 28 – October 2, 2019

Northern Colorado Amateur Radio Club Logo NCARCThe Northern Colorado Amateur Radio Club (NCARC) will operate a special event amateur radio station in conjunction with the WWV Centennial Celebration, a tribute to radio station WWV, the oldest continuously broadcasting radio station in the world, as it turns 100 years old on October 1, 2019.

Operating from alongside the historic and scientific long wave (WWVB) and short wave (WWV) radio stations, the NCARC effort will use 4 simultaneous operations on a variety of amateur shortwave bands. The goal is to contact as many amateur radio stations in the world as possible during the 5-day operating period, September 28 through October 2, 2019, using a variety of operating modes (Morse code, voice, and data).

The National Institute of Standards and Technology, NIST, (US Dept of Commerce) lists the official 100t?h celebration on their events calendar from 8am until 7pm, October 1, 2019.

NCARC and NIST are working on coordinating the celebration and the special event amateur station. Because of the present shutdown of the US Government, planning and discussions have been put on hold. We look forward to the end of the shutdown, a future press release from NIST, and getting back to work on planning the celebration of this historic event.
NCARC deemed it necessary to issue this press release on our own due to the uncertainty of the length of the shutdown and the need to get this event, at least the special event station, on everyone’s planning calendar as soon as possible.

The exceptional challenge of operating this station will require the help of amateurs and radio clubs throughout Colorado, the surrounding states, and from across the country. Amateurs who are interested in traveling to Fort Collins this fall and taking part in the operations are encouraged to apply starting February 15, 2019. Please see the Operators page on the website.

For more information, please visit the WWV Centennial Celebration website,? ?WWV100.com?.

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The Prof recommends the Sangean DAR-101

Many thanks to SWLing Post contributor, The Professor, who writes:

I’ve had one of these for along time, and it’s been pretty much the only way I’ve recorded radio for years. It’s an easy to use rock solid workhorse.

My biggest complaint is the lack of recording format choices, and I’ve long hoped there would be a firmware update to expand them. Sure, being able to record WAV files would be welcome, but I’m not really in need of that. What I would like is a broader range of MP3 encoding options, up to 320kbps. And of course, to be able record in mono or stereo. All MP3 options on everything are just stereo by default, because almost everybody is dealing with post 50s music in the MP3 format, and that’s always stereo. But AM and shortwave radio are of course only mono, as are phone conversations, which this device is specially outfitted to record.

It’s a waste of a channel. If it’s a mono source it’s a waste of space on the SD card just for starters. But don’t forget that the encoding rate is divided by two in a stereo format. A 160kbps mono file is equal to a 320kbps stereo file. So, a 192 mono file would be superior to a 320 stereo file. Of course, I could get into “joint stereo” and VBR and throw in more variables, but what I’m saying here is pretty much on point.

That said, AM broadcasting is rather limited in acoustical dynamics, at least as we know it. I’ve found that it’s very hard for almost anybody to hear any artifacts in a 32kbps mono recording of AM radio. It stands up to compression well. And it also stands up well to RE-compression. I often expand the MP3 files I make on this into mono WAV files and tidy them up and normalize and edit them. I never notice any artifacts in the MP3 encode I make of the resulting file(s). So, I’d like more encoding formats, but the 192kbps stereo option on the DAR-101 is fine for me in the end.

This recorder also makes a fine speaker for a laptop. When you hit record the first time the speaker monitors the audio source out loud. You press record again and it starts to lay down audio on the card. So if I want to use it as a speaker I just leave it in “ready to record” mode. Works fine.

And for you old cassette heads, it looks enough like a cassette deck, which is comforting I suppose. I think the wall wart AC power adds a little noise. I just make sure the batteries are charged when I’m going to use it. And sometimes it makes a difference to keep it a couple feet from your radio to avoid any little bit of RFI.

In general, I highly recommend the DAR-101. If anyone has any questions feel free to ask.

Thanks for sharing your review of the DAR-101 and your recommendations for recording amplitude modulation!

The DAR-101 is currently $87.95 on Amazon (affiliate link) and $99.95 at Universal Radio. I’ve also found used ones on eBay for as little as $50.70.

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