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Wednesday, February 20, 2019

Shortwave Radiogram



On 18 Feb 2019 I talked to Kim KD9XB on 40 meter SSB.  Kim -- who is retired from the Voice of America -- told me about a really interesting retirement broadcast project of his. "Shortwave Radiogram" uses a variety of amateur digital modes to transmit what are essentially text and image bulletins.  The really cool part is that Kim uses commercial shortwave broadcast transmitters to get his programs out. He uses transmitters in the U.S. and in Europe.   Listeners around the world tune in via shortwave (sometimes through WEB-SDR receivers) and then use FLDIGI or similar software to read the messages. You can see one of the radiograms being received in the video above.  There are more like it on YouTube.

Kim's site has more information, including his broadcast schedule on his web site:
http://swradiogram.net/ 

All of this reminded me of our old idea about putting the SolderSmoke podcast on a commercial shortwave transmitter.  I have my eye on the Bulgarian station... Stay tuned.  

Thanks Kim! 
  

Monday, February 18, 2019

RE-RUNS OF VINTAGE SIDEBAND NET -- To fill those lonely hours between SolderSmoke podcasts...

I really enjoy listening to these guys, and I suspect SolderSmoke listeners will too.  Like the SolderSmoke podcast, it is the perfect thing to have playing in the shack while you are working on something.  

Mike N9MS has recorded and placed online many of the net's sessions, some going back to 2015.  FB OM.  We thank you.  Please keep doing this.  

Back issues are available at the site below.  Just put the letter V in the search box and click.  The back issues will then appear. 


My message to the group: 

Vintagers:

I have now listened to the mp3 recordings of three of your Saturday morning sessions.  They are really great.  I tried to listen via the airwaves, but I am too far east.  To whoever is recording and posting these sessions:  please keep up the good work!  These recordings allow the FB ham spirit of the net to reach a GLOBAL audience. Please make the older sessions available -- many of us only recently learned of the net and would like to listen to earlier episodes. If server space is a problem, maybe I could help.  Let me know. I don't know if you realize it, but you guys are producing a very cool podcast every Saturday morning.  

My buddy Steve N8NM tried to check in with his S line last weekend but you guys couldn't hear him.  I'm sure he will try to somehow get more fire in the wire.  Please be listening for Steve. 

As for myself, I find myself plotting the use of one of those WEB-SDR sites to check-in.  But I fear the wrath of the brotherhood.  
DEATH TO THE VIOLATORS! 

73  Bill N2CQR  
http://soldersmoke.blogspot.com

Sunday, February 17, 2019

SSTV from SPAAAAACE! International Space Station Sends Images


The crew on the space station have been transmitting SSTV images.   This morning I threw together a receiving system:  I used my four element refrigerator tubing quad feeding the an RTL-SDR Dongle with HD-SDR software in the computer.  For the SSTV decoding I downloaded a program from Japan: MMSSTV (very nice).  To get the signal from HD-SDRto MMSSTV I just plugged a cheap little electret computer mic into the computer and taped it to the speaker.  

At 0838 local today ISS flew almost directly over me.   I aimed the quad south-west, and almost as soon as it was above the horizon very strong signals started pouring in.  They produced the first picture (above).  

ISS went silent as it passed over head. I swung the quad to the north-east hoping to catch another image as the station moved away.  That is the second image (below). You can see that I was losing the signal about halfway through.  

The distortion in the video image may be the result of me manually adjusting the receiver for Doppler shift. 


Here is a little video of the action in the shack during the first half of the pass. 


Here is the RTL-SDR Dongle Receiver in an Altoids Box: 

Here is that the programs looked like on the screen -- HDSDR on top, MMSS on the bottom:  


Here is what the orbital pass looked like. ISS was East of New Zealand when I took this picture.  ISS came up over the Eastern Pacific and Mexico before passing over N2CQR.  This display comes from the excellent Heavens Above web site:  




Tuesday, February 12, 2019

Listen to our Podcast while wearing a beret!

This is the official headgear of the Color-Burst Liberation Army. 

For a mere 16 dollars, you can wear the kind of beret worn by Pete Juliano, N6QW. 

Here at SolderSmoke, we are all about style, panache, savoirfair,  je ne se qua... 

If you send us a picture of yourself wearing a beret while either operating or building a rig,  you will win FOR FREE a one year subscription to the SolderSmoke on-line podcast.  ACT NOW!  Please tell them that SolderSmoke sent you. 


Saturday, February 9, 2019

Thursday, February 7, 2019

Indie Documentary: Apollo 11



Thanks to Bob Scott for the alert on this.  This new Indie film promises to be even better than the recent "First Man" movie (which was somewhat disappointing, with too much focus on family drama).   Armstrong looks so young in this trailer. 
Designer: Douglas Bowman | Dimodifikasi oleh Abdul Munir Original Posting Rounders 3 Column