Tag Archives: Southgate ARC

RSGB Archive: Silent Film of D/F Field Day in 1947

Many thanks to the Southgate ARC who notes this recently published 1947 silent film from the Radio Society of Great Britain:

The RSGB has released a vintage silent black and white video of an Amateur Radio Direction Finding (ARDF) field day held in 1947 at Chipping Barnet which was then in Hertfordshire

The Incorporated Radio Society of Great Britain titled the video – D/F Field Day (North of the Thames) May 18th 1947. It has been added to the many amateur radio videos that can be viewed on the Society’s YouTube channel.

One thing that’s apparent from the video is the difference in the age range of those who participated in amateur radio in the late 1940’s compared to today.

Watch RSGB Archive film – D/F Field Day 1947

Click here to view on YouTube.

Pages 69-70 of the RSGB Bulletin (forerunner of RadCom) for October 1947 contained a fully illustrated report on the North of the Thames ARDF event as well as the South of the Thames event held on July 6, 1947.

The two leading affiliated societies on May 18 were from Essex:
1st Romford and District Radio Society
2nd Southend and District Radio Society
The two clubs swapped positions for the July 6 event.

Fascinating! I love how everyone wore proper attire and much of the equipment was home brew. I imagine operators were happy to go back to field and enjoy all sorts of radio activity so close on the heels of WWII.

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VOA Museum presentation April 9, 2019: “Theatre of the Mind: Sound Effects During Radio’s Golden Age”

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(Source: Southgate ARC)

A National VOA Museum of Broadcasting Media Heritage presentation

A horse clip-clops down a cobblestoned street. Muffled shouts of street vendors calling out their wares rise up, then fade out.

A long time ago, before the age of the internet—and even before the age of television– radio comedies and dramas entertained the masses by creating stories and situations that relied on the listener’s imagination.

The tools used to help paint those audio landscapes were called sound effects.

The public is invited to join Cincinnati radio historian, WMKV producer and sound effects artist Mike Martini, president of the National Voice of America’s Museum of Broadcasting’s Media Heritage Collection, at “Theater of the Mind: Sound Effects During Radio’s Golden Age” on Tuesday, April 9 from 7 to 8:30 p.m. at the VOA museum in West Chester.

Martini will talk about the history of radio sound effects and demonstrate how some of the more popular effects were made.

Audience members will have a chance to try their hands at creating the effects, too. The event is free, but seating is limited. Donations are requested.

The VOA museum is open Saturday and Sunday from 1 to 4 p.m. at 8070 Tylersville Road in West Chester. General admission is $5 for adults and $1 for children. Museum docents are needed. They are trained on the history of the Voice of America, its technology at the VOA Bethany station, and the history of wireless radio and Cincinnati’s radio and TV broadcast history.

The VOA museum will host its fourth annual fundraiser, “75 Years of Rockin’ the Radio,” on Saturday, Sept. 21. Sponsorships are now available.

For more information on becoming a docent, a fundraiser sponsor or to reserve event seats, email [email protected] or call (513) 777-0027.

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“Managing SW Broadcasts From Ascension Island”

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Location of Ascension Island in the South Atlantic.

Many thanks to a number of SWLing Post contributors who share the following story from Radio World magazine (this summary via Southgate ARC):

Managing short wave broadcasts from Ascension Island

Radio World reports on the remote Atlantic Relay Station that transmits critical radio broadcasts to millions in Africa and beyond

A six-mile stretch of volcanic rock in the middle of the South Atlantic Ocean is home to the BBC’s Atlantic Relay Station.

Now managed and operated by Encompass Digital Media on behalf of the BBC World Service, the stations’ six powerful shortwave transmitters on Ascension Island beam program in a dozen or more languages to some 30 million listeners in north, west and central Africa.

The shortwave transmitters include two 250 kW Marconi BD272 transmitters originally installed in 1966 (and still in daily use) and four 250 kW RIZ K01 transmitters, which are also capable of transmitting in Digital Radio mode.

Read the Radio World story at
https://www.radioworld.com/columns-and-views/managing-sw-broadcasts-from-ascension-island

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MagPi Issue 80 features Ham Radio Projects for the Raspberry Pi mini computer

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Thanks to a hat tip from the Southgate ARC, I discovered that the excellent MagPi magazine has featured a number of ham radio projects in this month.

I’ve outlined below a list of the projects with page numbers–note that many are simply summaries that link to full project notes in previous editions:

Page 52: Pictures from space via ham radio
Page 71: ADS-B flight tracker (we also have a short tutorial here)
Page 72: WSPR transmitter
Page 73: Remote SDR scanner
Page 74: Digital voice hotspot
Page 75: Satellite tracking
Page 75: APRS IGate

Issue 80 of MagPi is free (click here to download as a PDF). You can also pay for a print subscription via post as well.

I highly recommend downloading each issue of MagPi–it’s a brilliant, informative magazine and is chock-full of projects and ideas for Pi fans of any age.

One of my Raspberry Pi 3Bs in service.

I’m a big fan of the Raspberry Pi and use it for a number of applications. This issue has encouraged me to give WSPR a go and perhaps even build a DV hotspot in the near future.

Raspberry Pi kits are quite affordable–Amazon has a massive selection from bare-bones units to full packages which include everything you need to get started. I’m a fan of both Canakits and Vilros.

Click here to search Amazon.com (this affiliate link also supports the SWLing Post).

I also purchase Pi systems, accessories, and hats from AdaFruit.

Post Readers: Are you a fan of the Raspberry Pi or other mini computers? Please comment and share your projects/ideas!

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Bloemendal shortwave station’s final transmission end of March

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Meyerton Shortwave Station

(Source: Southgate ARC)

The South African Radio League report Sentech will close its Bloemendal Shortwave Broadcasting station on 30 March, which means that today’s Amateur Radio Today will be the last programme to be transmitted on the 7 and 17 MHz broadcast bands.

Amateur Radio Today will however still be available on 7 082 kHz from Durban and on many repeaters around South Africa and from the SARL home page on www.sarl.org.za.

Sentech inherited South Africa’s Bloemendal shortwave radio station near Meyerton when Radio RSA was closed down. Radio RSA started its broadcast on 1 May 1966 and by 1976 the station transmitted for 36 hours a week in twelve languages including English, French, Portuguese, and Afrikaans. The service was discontinued in 1992. The only transmission that survived the close down was a broadcast into Africa, renamed Channel Africa. The SABC also transmits Radio Sonder Grense (RSG) on shortwave to the Northern Cape. Sentech also took over the sponsorship of Amateur Radio Today.

To increase coverage on HF in the Southern African area the SARL is looking at transmitting the programme on 7 MHz from more locations like the Western Cape, Free State and Gauteng to compliment the 7082 kHz transmission by Louis, ZS5LP from Durban. The frequencies being considered are in the band between 7 100 and 7 200 kHz. On Monday evenings 80 metres is also under consideration.

Radio Amateurs willing to offer their services on Sundays at 10:00 CAT and/or on Monday evenings on 80 metres are invited to send their contact details to [email protected].

The SARL could not make this announcement earlier as Sentech was unable to confirm their planned close down and requested the SARL not to announce the closure earlier.

The South African Radio League

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Radio Mi Amigo to go offshore May 30 – June 2, 2019

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(Source: Southgate ARC via Mike Hansgen)

Radio Mi Amigo to go offshore 30 May to 2 June

Five years after their success with Mi Amigo 40 in Ostend, the Mi Amigo team set their sails for the beautiful Belgian seaside resort of Blankenberge, to organise a week of transmissions, “live from the ship CASTOR”.

This will happen from Thursday 30 May to Sunday 2 June during the Blankenberg Havenfeesten”MI AMIGO 45″.

The Mi Amigo40 ship being used in 2019 is the Castor, an identical sister ship of Radio Caroline’s Ross Revenge tender, ‘Bellatrix’ and of the Greenpeace ship the ‘Sirius’.

Details here: https://worldofradio.co.uk/MiAmigo.html

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US Navy finds ham radio training makes “workers better at their jobs”

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(Source: Southgate ARC via Mike K8RAT)

Can learning amateur radio make for better engineers and software developers?

Writing in C4ISRNET – Electronic Warfare, Eric Tegler says:

When a group of [US] Navy engineers and software developers took time away from their day jobs in December, they spent the time pursuing a task long considered passe: they became licensed amateur radio operators.

Some 23 employees from Naval Air Warfare Center Weapons Division (NAWCWD) took a week-long class in amateur radio at Point Mugu, California culminating with an FCC amateur radio license test. All passed and are certified at the “technician” level for amateur radio operation [permitted 200 watts on some HF bands, 1500 watts above 30 MHz].

Now, Navy officials say the move may make the workers better at their jobs. The staff gained an understanding of radio frequency (RF) propagation that’s essential to what they do, said Brian Hill, electromagnetic maneuver warfare experimentation lead and collaborative electronic warfare supervisor at NAWCWD.

Hill, who earned his amateur radio license in high school, noticed that while most of his department’s recent hires had degrees in computer science, many had little background in RF theory or operation.

“You can explain antenna patterns and concepts like omni-directional vs directional using Smith charts, but it’s helpful to add a demonstration to really convey the concept,” Hill said. “You can explain modulation as a concept, but for a demo… let them listen to how modulated digital signals with audio frequencies sound… For those who never knew the joy of hearing a 2400 bps modem connect over a telephone line, it was a new concept!”

These concepts are central to electromagnetic maneuver warfare.

“We need to be able to have awareness of all threats and opportunities from [zero frequency] to light within an integrated system,” Hill said. “Our adversaries are looking at the entire spectrum to use against us, and we need to do the same. Having awareness of how the atmosphere changes from daylight to night and how that affects propagation of [high frequency] is important.”

This can be critical for young developers/engineers whose experience is typically limited to the UHF/EHF-based systems now in vogue across communications, guidance and ISR technologies.

Read the full story at
https://www.c4isrnet.com/electronic-warfare/2019/02/06/can-learning-ham-radio-make-for-better-engineers-and-software-developers/