Category Archives: Guest Posts

Guest Post: “Tinkering with History”

Many thanks to SWLing Post contributor, Bob Colegrove, who shares the following guest post:


Tinkering with History

By Bob Colegrove

One of the attractive aspects of radio as a hobby is that it has so many specialties to channel our time.  Just for the sake of classification, I would group these into two categories, listening and tinkering.  I think the meaning of each category is fairly intuitive.  Probably few of us approach our interest in radio in the same way.  Most of us have dabbled in more than one listening or tinkering specialty.  Perhaps we have been drawn to one particular area of interest, or we may have bounced around from one to another over a period of time.  I know the latter has been my case.

Tinkering might start with a simple curiosity about what makes the radio play, or hum, or buzz, and progress to an obsessive, compulsive disorder in making it play, hum or buzz better.  Unfortunately, over the past 30 years or so, the use of proprietary integrated circuits, as well as robotically-installed, surface-mounted components have greatly short-circuited what the average radio tinker can do.  For example, I have noticed a lot more interest in antennas over that period, and I think the reason is simple.  The antenna is one remaining area where a committed tinker can still cobble up a length of wire and supporting structure and draw some satisfaction.  But the complexity and lack of adequate documentation have largely kept newer radio cabinets intact and soldering irons cold.  Bill Halligan knew you were going to tinker with his radios, so he told you how they were put together.  The fun began when you took your radio out of warranty.  If you did get in over your head, there was usually somebody’s cousin not far away who could help you out.  The following is a sample of how one resolute tinker managed to overcome the problem of locked-down radios in the modern age. Continue reading

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Guest Post: Mark explores a 1983 Voice of America information pack

Many thanks to SWLing Post contributor, Mark Hirst, who shares the following guest post:


VOA Information Pack 1983

by Mark Hirst

Introduction

A recent guest post on this blog by Jock Elliott asked the question, ‘Why Listen to Shortwave?’

The comment I left at the time was my interest in how nations view themselves, and how they project that view to the world. This might be in the form of cultural exports like music, or teaching us about famous people or revered institutions in their country.

When I first started listening to shortwave in the early eighties, I never got into the habit of asking for QSL cards, being quite thrilled enough to receive programme guides in envelopes stamped with the postmark of other countries.

At the time, the primary stations for me included Radio Netherlands, Radio Sweden, Swiss Radio International, and the Voice of America. While most might send a small leaflet about their country with a frequency schedule, the information pack I received from the Voice of America stands head and shoulders above the others.

I thought readers might be interested in a brief description of this pack and with it a glimpse back into the world of 1983.

Please note that as you read the following sections, you can click on the images to view a larger version.

Package Contents

The package arrived in a manila envelope, with the logo and address of the VOA printed in the top left corner. In the top right corner is the logo of US Mail, with a declaration that postage and fees where paid for by the US Information Agency.

Package contents included:

  • Compliments Card
  • VOA Sticker
  • Steering the Course Magazine
  • VOA Magazine
  • May-October 1983 Programme Schedule

VOA – The Voice of America

This guide begins by outlining the mission of the VOA, emphasising its aim to be an authoritative and reliable source of news. Continue reading

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Guest Post: Comparing the Reuter Pocket and the Icom IC-705 from an SWL’s perspective

Many thanks to SWLing Post contributor, Uli (DK5ZU), who shares the following guest post:


SWL with a Reuter Pocket and the Icom IC-705

by Uli (DK5ZU)

Some time ago I asked how the IC-705 performs on longwave and I got some great feedback. Thanks a lot again. Since the HAM bug bit me again, I wanted to do SWL and HAM Radio portable with one rig. I started with SWL some weeks ago (just before the bug bit). I acquired a second hand Reuter Pocket RDR 51 Version B2. It is a standalone SDR Receiver 0 … 30 MHz / 50 ..71 MHz, and in my B2 version it has also FM (Stereo/RDS) and Digital Audio Broadcasting (DAB). You may find the detailed specs here:
https://www.reuter-elektronik.com/html/pocket.html

The Reuter Pocket could, at one point, be configured as an QRP Transceiver, but it is no longer supported. There is a new RDR 52 small tabletop models, which can be ordered as a transceiver, too. But due to Covid related supply chain problems and price changes for the components, the new model is currently postponed.

The IC-705 is available, though. And for portable HAM operations it is a no brainer; obviously with a high price tag, but comparable with a new Reuter RDR 52 tabletop. And since my budget for the hobby is limited, I thought about funding part of the IC-705 price by selling the Reuter Pocket. But I wanted to do a side-by-side comparison so I ordered the 705 and was able to check them both on one antenna. The goal was to compare their sensitivity and selectivity on the lower bands: BC on AM and HAM bands for SSB. I did not compare CW since I am not a CW operator.

The antenna is a MiniWhip from PA0RDT which works quite well on the lower bands.

This comparison is not at all scientific and reflects just my opinion and what I heard. But anyway, there may be some people out there interested in this. So much for the intro.

Let’s start with my overall findings. Continue reading

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Guest Post: Crystal Radios – Construction, Listening, and Contesting

Many thanks to SWLing Post contributor, David Day (N1DAY), for sharing the following guest post:


Crystal Radios – Construction, Listening, and Contesting

By David Day – N1DAY

The date was November 2, 1920 and the world was about to change forever when radio station KDKA out of Pittsburgh PA made its first broadcast of election results from the 1920 presidential election.  For the first time in history people knew who won the election before reading about it the next day in the newspaper.  Radio had arrived!

However, hearing the election results was not as easy as powering up an AM radio receiver because radio electron tubes had only been invented a few years earlier and they were still too expensive for most people to afford in a radio set.  After KDKA’s historic broadcast, large 50,000 watt stations began popping up in all major cities around the world.  Even though a tube-driven radio was not yet commonplace, many people listened to these stations on their crystal radios.  The frenzy around radio in the 1920’s was not unlike the excitement around cell phones and the internet today.  If you didn’t have one, you were simply living in the past.

A family listening to a crystal radio in the 1920’s

Fortunately, in the early 1920’s the crystal radio had been around for a while and it was easy to make or purchase a completed set on a limited budget.  The beauty of the radio was that it was a passive device needing no power source other than the radio station’s broadcast that was received by a good antenna about 50 feet long and 15 or so feet above the ground.  Crystal radios derived their name from use of galena crystals as detectors. Continue reading

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Shortwave’s Giant: Carlos explores evangelical broadcasting to MENA

Many thanks to SWLing Post contributor and political cartoonist, Carlos Latuff, who shares the following guest post:


WINNING HEARTS, MINDS AND…SOULS!

Catechizing via shortwave.

by Carlos Latuff, special for The SWLing Post

During the Vietnam War (1955-1975), the expression “hearts and minds” became popular and referred to the US government’s strategy to gain allies among the South Vietnamese against the Vietcong guerrillas. Over the years this strategy has been used in different contexts. What I’m going to talk about in this short article is how the radio waves have served Christian evangelical churches, to win hearts and minds, specially in Africa and Middle East (MENA).

Different from what I did with the Ethiopian clandestine broadcasts, when I spent around 3 months monitoring, with evangelical radios it took only two days in January 2022; quite simple, since they’re stations with regular programming. Most of them have good signal reception, there’s no jamming from other countries and, despite transmitting in different languages, little translation was necessary since the content is always the same: religious preaching.

All listenings happened in Rio de Janeiro. The radio sets used in this monitoring were the XHDATA D-808 and an old analog radio Sanyo RP-8351, made in Brazil in the 70’s. A 7-meter long wire antenna was used in all listenings. Continue reading

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Guest Post: Following the Ethiopian war over shortwave radio

Many thanks to SWLing Post contributor and political cartoonist, Carlos Latuff, who shares the following guest post:


Carlos Latuff at Catacumba Park in Rio de Janeiro, monitoring Ethiopian broadcasts.

ETHIOPIA: A WAR THROUGH RADIO

by Carlos Latuff, special for The SWLing Post

We just entered 2022 and the civil war in Ethiopia has already completed 1 year. On the one hand we have the  Tigray People’s Liberation Front (TPLF) guerrillas from northern Ethiopia and its allies, and on the other hand we have the armed forces of Ethiopian government and its allies. The dead are piling up, accusations of war crimes from both sides, local and international political interests at stake, and no perspective for a peaceful solution. Without going into the reasons for this new war in Ethiopian territory, I’d like to focus on the use of radio waves by both parties of this conflict.

I monitored shortwave broadcasts from Ethiopia and to Ethiopia between October 21, 2021 and January 4, 2022. The receivers were Tecsun PL-606 and XHDATA D-808, using both the telescopic antenna and a long wire. In all cases, listening was carried out in Brazilian cities.

Carlos at Catacumba Park monitoring and recording clandestine Ethiopian broadcasts.

The monitored stations were: Continue reading

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The Gift That Keeps On Giving: Pavel’s Amazing Upcycled Hombrew Radios!

Many thanks to SWLing Post contributor, Pavel Kraus, who shares the following guest post:


Inspiration for gifts

by Pavel Kraus

This article should be just an inspiration for how to make a gift for our wives and neighbors so that they are not upset that we are still sitting at the radio, but rather they also have something to do with it.

When I see a nice box, I get the thought of building a radio in it.

Iomega ZIP Drive Radio

For the production of the first two radios, I used boxes from Iomega ZIP floppy disk drives, which were previously widely used in DTP studios before the advent of USB flash drives and can certainly be found as discarded in warehouses.

Used electronic components can be purchased on eBay, Amazon, Aliexpress – they are radio modules, batteries, charging module, other components can be found in our amateur stocks.

After removing the inside of the Iomega ZIP drive, there is room for the module to be built in and the transparent window prompts you to place the module with the display.

I desoldered the encoders from the motherboard and placed them on the side of the radio. The fingerboard of the button from the drive can also be used as a power switch.

At the same time, the original LEDs can be used as an indication of charging the built-in battery.

In the second type of radio using the same box, a button control module is used, where the buttons have been desoldered and connected to a separate board inside the radio.

Russian Enclosure Radio

The third type of radio uses a box from Russian radio by wire, where an AM / FM radio module with a clock was built in.

Commodor C 64 Power Supply Radio

The last type uses half of the box from the Commodor C 64 power supply. It has a built-in radio module with IO SI 4732 (radio from the Commodore C64 power supply box with SI4732 radio module .jpg).

A photo of my wife is printed on the radio panel so she doesn’t say I’m looking at foreign women.

I wish you all a beautiful and relaxing Christmas, all the best until the new year 2022 and a lot of inspiration for radio hobbies.

Pavel Kraus

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