HFU HF Underground
Loggings => North American Shortwave Pirate => Topic started by: ChrisSmolinski on October 14, 2013, 2228 UTC
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6924.65 AM
ID at 2239z.
About an S8 here.
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2226 carrier on
2226 YL dance track
S6 and fady
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Music started at 2229, about S-7 here Echo 1? Yup ID 2231
Thanks for the Lorde song!!
SSTV 2251
225 GSTQ what else? lol.
Thanks for the dedication E1
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Yes, music now. Nothing I recognize yet :-)
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S7-9 here
2238..rock tune
2238 Radio Echo 1 ID
2241 On East-West line to me,
2242 Address for reception reports, ID
Audio a little distorted
2246 Shoutout to Chris Lobdell, and song dedication
2252 SSTV.. I am not decoding this very well... ah there we go.. A union Jack
2252 God Save the Queen
2256 Off
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Only a carrier here.
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Kind of a crappy image thanks to the band conditions here.
(http://i1128.photobucket.com/albums/m493/myteaquinn/Pirate%20Radio%20SSTV/201310142253_zps3eaeb73e.jpg) (http://s1128.photobucket.com/user/myteaquinn/media/Pirate%20Radio%20SSTV/201310142253_zps3eaeb73e.jpg.html)
By the way thanks for the program Radio Echo One.
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If you want to run any recordings again, the SSTV was in Scottie2
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The extremely slanted image is an indicator of a severe timing problem. This can happen if the SSTV software used to generate the image is not properly calibrated, or can be induced by encoding the audio as an mp3 or other compressed format. I did decode two of the images, and had to make huge adjustments to the timing a lot to get rid of the slant.
(http://www.radiohobbyist.org/blog/mypics/15Oct2013-075144.JPG)
(http://www.radiohobbyist.org/blog/mypics/15Oct2013-075304.JPG)
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The extremely slanted image is an indicator of a severe timing problem. This can happen if the SSTV software used to generate the image is not properly calibrated, or can be induced by encoding the audio as an mp3 or other compressed format. I did decode two of the images, and had to make huge adjustments to the timing a lot to get rid of the slant.
(http://www.radiohobbyist.org/blog/mypics/15Oct2013-075144.JPG)
(http://www.radiohobbyist.org/blog/mypics/15Oct2013-075304.JPG)
The only way for me to save the SSTV audio is by recoding in WAV and then implanting into the show which saves as WMA.
For the record, the images are
1. Pikachu
2. York Railway Station (an awesome place to go spotting - and I took the picture myself)
3. Union Jack
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Keeping the show as a WAV file would eliminate the timing problem, but the resulting audio files would be huge. You could keep the SSTV as a separate audio file in WAV format, and send the program audio as an mp3 or WMA or whatever, but that might be a hassle for your relay operator?
Also, for whatever reason, I have noticed that SSTV images, when transmitted in AM mode, often looked "washed out". I'm not sure if this is due to the transmitting or receiving side (or both). IIRC I've sometimes demodulated them in SSB mode, resulting in a slightly better image.
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It could be a hassle, but it is something to think about... I will discuss with my relay operator as you suggest.
Anyway, where you heard me from, did I bury the Peskies?
How did the first image come out? The Pikachu one
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Yes, the signal from the first transmission was strong. The later show, around 0200z, was quite weak.
The first SSTV image was split between two SDR recording files, so I didn't decode it.
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It's all my fault, I took the file and saved it as an mp3 file! :(
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It's all my fault, I took the file and saved it as an mp3 file! :(
It would be interesting to run the original WMA file through an SSTV decoder, and see if the slant issue is there as well.
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I'll put iphone app on and play it out the speaker and see what decodes... lol
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Yes, the signal from the first transmission was strong. The later show, around 0200z, was quite weak.
The first SSTV image was split between two SDR recording files, so I didn't decode it.
It was not split by me.
I can send you the SSTV file itself if you want it, Chris