Medium wave podcasts

A brief introduction to the HamSCI community

Play Episode Listen Later May 10, 2025 4:59

Foundations of Amateur Radio Since becoming a licensed amateur in 2010, I have spent a good amount of time putting together my thoughts on a weekly basis about the hobby and the community surrounding amateur radio. As you might know, my interest is eclectic, some might say random, but by enlarge, I go where the unicorns appear. Over a year ago I mentioned in passing a community called HamSCI. The label on the box is "Ham Radio Science Citizen Investigation", which gives you a sense of what this is all about. It was started by amateur radio scientists who study upper atmospheric and space physics. More formally, the HamSCI mission is the "Continuation and extension of the amateur's proven ability to contribute to the advancement of the radio art." If you visit the hamsci.org website, and you should, you'll discover dozens of universities and around 1,300 people, many of whom are licensed radio amateurs, who are asking questions and discovering answers that matter to more than just our amateur community. For the eighth time the HamSCI community held an annual "workshop", really, an opportunity to get together and share ideas, in person and across the internet, a conference by any other name. Under the banner theme of "HamSCI's Big Year", over two days, 56 people representing 27 different organisations across 61 sessions, tutorials, discussions, tours, posters and demonstrations, explored topics all over our hobby, from the Personal Space Weather Network, capable of making ground based measurements of the space environment, to the Whistler Catcher Pi, a project to record the VLF spectrum to 48 kHz using a Raspberry Pi. You'll find research into HF antennas for the DASI or Distributed Array of Small Instruments project and associated NSF grants, exploring measurements of HF and VLF, combined with GPS and magnetometer across 20 to 30 stations. There's discussions on how to explore Geospace Data, such as information coming from the Personal Space Weather Station network, or PSWS, using the OpenSpace project and dealing with the challenges of visualising across a wide scale, all the way up to the entire known universe. Did I mention that there's work underway to add PSWS compatible receivers to Antarctica? There reports on observations and modelling of the ionospheric effects of the April 2024 solar eclipse QSO party, including Doppler radio, HF time differences, and Medium Wave signal enhancements, not to mention planning and promoting future meteor scatter QSO parties. There's, post-sunset sporadic-F propagation, large scale travelling ionospheric disturbances, GPS disciplined beacons, the physical nature of sporadic-E propagation and plenty more. As you might have heard me say at one time or another, the difference between fiddling and science is writing it down. It means that you'll find every session has accompanying documentation, charts, graphics and scientific papers. Remember, there's eight years of reading to catch up with, or learn from, or play with. The publications and presentations section on the hamsci.org website currently has 526 different entries. You might not be interested in the impact of radio wave and GPS scintillation, or rapid fluctuation in strength, caused during the G5 geomagnetic storm that occurred on the 10th of May 2024, or a statistical study of ion temperature anistropy using AMISR, or Advanced Modular Incoherent Scatter Radar data .. or you might. In case you're curious, "anistropy" is the property of being directionally dependent, in other words, it matters in which direction you measure, which might have some relevance to you if you consider that we think of the ionosphere and radio paths being reciprocal. If it reminds you of isotropy, that's because they're opposites. The point being, that amateur radio is a great many things to different people. If you're a scientist, budding, graduate or tenured, there's a home for you within this amazing hobby. I'm Onno VK6FLAB

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Long Wave Radio

Foundations of Amateur Radio

Play Episode Listen Later Jun 8, 2024 4:49

Foundations of Amateur Radio If you've heard the phrase "shortwave listeners", you might have wondered what on earth that was all about. It relates to the length of a radio wave used to transmit information. The length of a radio wave is tied to its frequency. The longer the wave, the lower the frequency. When radio amateurs talk about bands, like for example the 40m band, we're talking about a range of frequencies where the wavelength is around 40m. From a frequency perspective, this is around 7 MHz. The 160m band, at about 1.8 MHz, or 1,800 kHz is considered the beginning of the short wave bands. This implies that there are longer waves as well. If you've ever seen or owned a mid 1980's transistor radio, you'll have seen the notation MW, which stands for Medium Wave, today it's called the AM band. Older radios might have the notation LW, or Long Wave. The medium wave band is a broadcast radio band that runs between about 500 and 1,700 kHz. The wave length is between 600 m and 170 m. When radio was still in its infancy, there was also a popular long wave band, with wavelengths between 800 m and 2,000 m, or 150 to 375 kHz. Today much of that has gone by the wayside. With the advent of digital radio, in Australia it's called DAB+, Digital Audio Broadcasting, the whole idea of "wave" has pretty much vanished. Some countries like Japan and the United States are in the process of discussing the phasing out of the AM broadcast band. Much of that appears to be driven by car manufacturers who claim that the AM band is no longer useful or used, but forget to tell anyone that they really want to stop having to put AM radios in their cars because it's difficult to isolate the electrical noise from their modern contraptions in order to make it possible to actually listen to that band. If you ask me, it's a good incentive to make electronics RF quiet, something which is increasingly important in our wirelessly connected world. This might lead you to believe that all activity on air is moving to higher and higher frequencies, but that's not the case. The properties that made long wave and medium wave radio possible in the early 1900's are still valid today. For example, there are WSPR or Weak Signal Propagation Reporter beacons on the 2200m band, or at 136 kHz. Whilst your RTL-SDR dongle might not quite get down that low, most of them start at 500 kHz, you don't need to spend big to start playing. My Yeasu FT-857d is capable of tuning to 100 kHz, plenty of space to start listening to the 2200m band, even if I cannot physically, or legally, transmit there. If you want to build your own receiver, you can check out the weaksignals.com website by Alberto I2PHD where you'll find a project to build a receiver capable of 8 kHz to 900 kHz using a $50 circuit board. If that's not enough, there's radio experimentation happening at even lower frequencies. Dedicated to listening to anything below 22 kHz, including natural RF, with a wavelength greater than 13 km, Renato IK1QFK runs the website vlf.it where you'll find receivers and antennas to build. Given that most sound cards operate up to around 192 kHz, you can start by connecting an antenna to the microphone port of your sound card and use it to receive VLF or Very Low Frequencies. On your Linux computer you can use "Quisk" to tune. There are VLF transmitters on air. For example, SAQ, the Grimeton Radio Station in Sweden opened on the 1st of December 1924. Capable of 200 kW, today it uses about 80 kW and transmits twice a year on 17.2 kHz. While we search for higher and higher frequencies, there is still plenty of fun to be had at the other end of the radio spectrum. Consider for example that VLF or Very Low Frequency radio waves, between 3 and 30 kHz can penetrate seawater. I'll leave you to explore. I'm Onno VK6FLAB

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Radio Rollback 040 AM Radio 71

Radio Rollback

Play Episode Listen Later Nov 12, 2023 32:37

Radio Rollback Episode 40 AM Radio Radio 1971. On this Episode We play a couple of recordings, recorded fresh of the Medium Wave in 1971 Some fading Radio Luxemburg with Dave Christian. 23rd August 71 Some RNI, with Dave Gregory on the air. 10th July 1971 These are just raw recording, just as they were recorded. And back in the day, we loved listening to radio so much we didn't care. No super FM stereo here! email jeffmartinmedia220@gmail.com © 2023 Jeff Martin Media

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ICQ Podcast Episode 416 - Amateur Radio Someone Else's Problem

icqpodcast's Amateur / Ham Radio Podcast

Play Episode Listen Later Nov 5, 2023 132:55

In this episode, we join Martin Butler M1MRB, Dan Romanchik KB6NU, Caryn Eve Murray KD2GUT, Edmund Spicer M0MNG, and Ed Durrant DD5LP to discuss the latest Amateur / Ham Radio news. Colin Butler (M6BOY) rounds up the news in brief and in the episode's feature is Amateur Radio, Someone Else's Problem We would like to thank an anonymous donor and our monthly and annual subscription donors for keeping the podcast advert free. To donate, please visit - http://www.icqpodcast.com/donate - Club opens arms to the Radio Community for a "build-a-long". - FCC Eyes New Approach to Wireless Alerts - FCC To Vote on Removing Symbol Rate Restrictions - Northern India State Makes Hams Top Priority - End of Teletext Service in Ireland - Saved by 2 Metres - RFI from above is Anything but Heavenly Interference - Broadcast Celebrates 80 Years for UK Shortwave Site - D.A.R.C. Celebrates 100 years of Broadcast Radio in Germany with a Transmission on Medium Wave and other Activities. - RCF funds amateur radio exams for young people - UK Amateur Radio Exam shutdown over festive season - Announcing the D-STAR QSO Party 2023

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From the Archives: Music Power Party with Oscar Renzi (November 1989)

The Capital Radio 604 Podcast

Play Episode Listen Later Aug 27, 2022 30:37

Thanks to Rafael Ripoll for this old recording off Medium Wave. Milli Vanilli - Girl I'm Gonna Miss You Janet Jackson - Miss You Much Dynasty of Two - Stop This Thing Steve Winwood - Higher Love Advert - Mills Special Cigarette Promo - 10th Birthday Bonanza Competition Thompson Twins - Sugar Daddy Simply Red - Money's Too Tight

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From the Archives: The Wiz is Oz with Oscar Renzi (1989)

The Capital Radio 604 Podcast

Play Episode Listen Later Aug 27, 2022 27:12

Thanks to Rafael Ripoll for this old recording off Medium Wave. Sinitta - Cross My Broken Heart Bonnie Raitt - Thing Called Love Raze - Break 4 Love Advert - Mills Special Cigarette Promo - 10th Birthday Wild Coast Slotmachines Tears For Fears - Sowing The Seeds Of Love Parliament - Gloryhallastoopid Pat & Mick - Let's All Chant

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From the Archives: Solid Gold Sunday with Dave Simons (November 1989)

The Capital Radio 604 Podcast

Play Episode Listen Later Aug 27, 2022 23:39

Thanks to Rafael Ripoll for this old recording off Medium Wave. Billy Fury - Like I've Never Been Gone Roy Orbison - Blue Angel Ned Miller - From A Jack To A King Elvis Presley - Return To Sender Del Shannon - The Swiss Maid Elvis Presley - One Broken Heart For Sale Advert - Camel Cigarette Advert - Coca Cola sung by Mango Groove Jingle - Solid Gold Sunday Tracey Ullman - Move Over Darling The Beatles - Penny Lane The Move - Blackberry Way Limahl - Never Ending Story

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A brief introduction to the HamSCI community

Long Wave Radio

Radio Rollback 040 AM Radio 71

ICQ Podcast Episode 416 - Amateur Radio Someone Else's Problem

From the Archives: Music Power Party with Oscar Renzi (November 1989)

From the Archives: The Wiz is Oz with Oscar Renzi (1989)

From the Archives: Solid Gold Sunday with Dave Simons (November 1989)

Mark 10:8 Make ______ Great Again! DDP#913

Acts 2:28 Hobby Power DDP#912

Colossians 3:5 Don't drink the poison! DDP#911

Matthew 6:21 From Wild Whiskey To God! DDP#910

Matthew 6:21 Congruence! DDP#909

Hebrews 12:2a Risky Living! DDP#908

Romans 7:12 The Law! DDP#907

John 9:10-11 See Now! DDP#906

Psalm 139:23 A Little Introspection Now! DDP#905

Hebrews 12:2 Delay Gratifaction Now! DDP#904

Hosea 6:6 Let's Go! DDP#903

Romans 6:7 Let Go! DDP#902

1 Corinthians 15:22-23 Following The Winner DDP#901

1 Corinthians 2:9 Don't go shopping DDP#900

Philippians 3:12 Your Goal in Life 4 - short term DDP#899

Ephesians 4:23 Cooperating with God's Spirit 1: the first step DDP#898

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1 Corinthians 16:14 Your Goal in Life 1 - Motivation DDP#895

Matthews 6:34 Happiness 5 - One Day... DDP#894

Genesis 1:22 Happiness 4 - The Old Testament DDP#893

Ezekiel 26:36 Billy Graham and Life Changing Transformation DDP#892

Mark 1:35 Happiness 3 - your morning routine DDP#891

Romans 5:3-4 Happiness 2 - perseverence DDP#890

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James 4:10 Lifted up and soaring DDP#888

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Colossians 1:10 What is a Christian? 1:Lifestyle DDP#881

Matthew 22:37-39 Church Growth 2: Purpose Statement DDP#880

Acts 2:26-27 Church Growth 1: Method DDP#879

Nehemiah 1:3 Start Again! DDP#878

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