If you’re a member of the Radio Society of Great Britain (RSGB) you may have seen my review of the ALT-512 QRP transceiver in the March 2020 issue of Radcom. This was my first review for Radcom after having been invited to submit a review at the 2018 Hamvention.
I love Radcom so was pretty chuffed to see my review in the March pages:
I had the ALT-512 here at SWLing Post HQ, on loan from the manufacturer, for the better part of six months. I got to know this little radio inside-out. I’ve operated it in the field, in the shack and covered ever mode including FT-8 contacts during portable operations and even in a high school classroom.
The ALT-512 is a versatile, sturdy little rig–designed and manufactured in Bulgaria. I really only had minor complaints about this transceiver. I saw a bright future for this little rig. It was well-designed and backed by a company and team of ham radio operators that had already successfully launched several other transceivers.
Then the unexpected happened…
Early last month, I learned that the ALT-512’s main engineer and designer, Dobri Hristov (LZ2TU), passed away.
If you own the Sky SDR or LD-11, you may have communicated with Dobri at some point when you needed technical support. Dobri was a well-respected fellow and distinguished ham radio operator/DXer. I corresponded with him quite a few times in the past.
Sadly, when Dobri passed away, he took the ALT-512 with him.
Here’s the announcement from Aerial-51’s website.
Dobri passed away as the March 2020 issue of Radcom was being printed. He never got to see it, but I’d like to think he would have been quite proud of his little transceiver. In the end, I think it was an overall positive review.
You can judge for yourself: Aerial-51 recently published a copy of the ALT-512 review with permission from the RSGB.
If you’re into ham radio and are looking for a top-shelf publication, consider joining the RSGB and subscribing to Radcom. I highly recommend them even though their judgement was obviously impaired when they invited me to write a review–! 🙂
Many thanks to SWLing Post contributor, Kris Partridge, who shares the following film from the archives of the Radio Society of Great Britain (RSGB):
Wow! Thanks so much for sharing this film, Kris. What an amazing number of classic rigs. Hams back then needed some serious muscle to take their gear to the field!
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
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.
(Source: Southgate ARC)
RSGB has announced Syllabus 2019 for Foundation, Intermediate and Advanced amateur radio exams will be released during the week commencing August 13
There will be a considerable amount of work to be done by volunteers to implement the changes. It is understood there will be at least 12 month’s advance notice before the syllabus changes are implemented.
The announcement on the RSGB site says the new syllabus was approved by the RSGB Board in July. The 2018 RSGB Examination Standards Committee report indicates Ofcom approved the syllabus in May.
Read the RSGB announcement at
2018 RSGB Examination Standards Committee report released
The RSGB run an email group at groups.io to allow for regular updates, news and sharing of ideas between trainers. To join the group request membership from the web page: https://groups.io/g/RSGBtutors
Many thanks to SWLing Post contributor, Gary (W4EEY), who writes:
I want to recommend an excellent presentation on RF Interference from
the Radio Society of Great Britain (RSGB) Convention in 2015. The
presenter is Ian White, GM3SEK, who has a Blog website here:
You can find the presentation video on YouTube here:
The presentation runs for about one hour and contains some valuable
information to help you fight noise and interference in your shack.
Thanks for the tip, Gary!
(Source: Southgate ARC)
WWII role of the RSGB and Voluntary Interceptors
A new RSGB web page highlights the role of Voluntary Interceptors in the Second World War and the crucial involvement of the Society
At the outbreak of WWII in 1939 MI5 established a unit known as the Radio Security Service (RSS) to detect and monitor enemy radio transmissions. The RSGB were approached to help pick and recruit radio amateurs with advanced Morse skills. These volunteers became known as the Voluntary Interceptors.
The former President of the Chelmsford Amateur Radio Society, Harry Heap G5HF (SK), was a Voluntary Interceptor, further information at