Tag Archives: Videos

Video: N1SPY builds and describes the components of a simple receiver

Many thanks to Thomas Cholakov (N1SPY) who shares the following video where he explains how radio receivers work and builds a radio receiver:

Click here to view on YouTube.

As always great video, Thomas! Keep up the good work!

Ivan performs two tests with the AirSpy HF+

Many thanks to SWLing Post contributor, Ivan Cholakov (NO2CW), who shares the following:

Thomas, there has been a lot of discussions regarding Airspy HF+ ever since it came out – heated exchanges regarding comparisons with peers, modifications and firmware updates.

I took my Airspy HF+ and conducted two tests with it:

Airspy HF+ vs. SDRPlay RSP-1A on HF and Medium Wave

Click here to view on YouTube.

Since I could not completely equalize the audio levels, I think it’s good to look at the peak to valley ratios on the display rather than the audio volume.

Airspy HF+ with the R3 mod on and off:

Click here to view on YouTube.

This comparison used SDR #. It may be helpful to run the same comparison on SDR Console V3. I may do that at a later time.

Both tests used W6LVP’s portable amplified receiving loop antenna in a noisy suburban backyard in Florida.

Many thanks, Ivan, for sharing these comparison tests! I agree with you that it’s most helpful to look closely at the peak to valley ratios on the spectrum display rather than using the audio levels as a measure.

Video: Russian numbers station on the 19 meter band

Many thanks to SWLing Post contributor, Moshe, for sharing the following video:

I uploaded this video I made in a rush, holding our baby in one hand and my smartphone in the other one…

The receiver is my Ben-Gal Verdi.

I caught the station by accident, while tuning to VOA 15580kHz to listen to Boarder Crossings.

Click here to view on YouTube.

Fantastic catch, Moshe! Thank you for sharing. I can’t tell you how many times in the past I played radio while also holding a baby in my arms. Always a challenge!

Listening to ARISS contacts last week

I get just as excited as my kids when I receive any communications from the International Space Station. This past week, we fit an ARISS contact fit into our hectic schedule during lunch break. I gave both of my kids a handheld radio and we all listened together as the ISS passed overhead.

Right on schedule, we heard NA1SS, but it sounded like they were struggling to make contact with KD2IFR at the Central Islip Union Free School District in Central Islip, NY.

I made a short video about one minute into the scheduled contact. I believe both parties were forced to move to their backup channel because we never heard an exchange–only NA1SS calling KD2IFR:

Click here to view on YouTube.

Still…we heard an astronaut live, so mission accomplished!

SWLing Post contributor, Mark Hirst, had much better luck last week monitoring an ARISS contact with King’s High School in Warwick, UK. Check out his excellent video:

Click here to view on YouTube.

Thanks for posting that video, Mark. By the way, I love your FT-817ND setup!

In fact, the King’s High School ARISS contact snagged some excellent publicity via the BBC.  Here’s an article via the Southgate ARC:

King’s High School ARISS contact on BBC TV

On April 19 student Eleanor Griffin led the live question and answer session between King’s High School (GB4KHS) and astronaut Ricky Arnold KE5DAU on the International Space Station (OR4ISS)

King’s High School strongly encourage their girls to develop their interests both inside and outside the classroom. This culture of empowerment led one of their girls to apply to ARISS Europe (Amateur Radio on the International Space Station) for a highly prestigious link-up to the International Space Station.

Nicola Beckford reporting on the contact for the BBC – credit KHS

When Eleanor Griffin was selected to hold a space conversation with an astronaut, she was inspired to set up the Warwick Mars Project, for students across the Warwick Independent Schools Foundation, to further interest in Space Science. Eleanor says: “The moon landings belong to the generation of our grandparents, and the International Space Station to our parents. What will happen in our generation? Will Mankind travel to another planet?”

When asked what the incredible experience of the ISS contact had taught her Eleanor replied “Just do it! No one is going to stop you, if you just go and pursue your dreams, you really can do anything.”

Watch the BBC TV news item broadcast on Midlands Today @bbcmtd. Fast forward to 18:45 into the recording at
https://www.bbc.co.uk/iplayer/episode/b09z9tw6/midlands-today-evening-news-19042018

Amateur Radio on the International Space Station (ARISS)
http://ariss.org/
https://twitter.com/ARISS_status

King’s High School Warwick
https://twitter.com/KHSWarwick

If you missed these ARISS contacts, no worries! Check out the ARISS “Upcoming Contacts” page where future ARISS QSOs are listed. ARISS contacts are a great opportunity to show kids of all ages what you can hear with even a modest radio!