[A-DX] Fwd: Shortwave Radiogram, 21-24 September 2018

[Roger]

-------- Weitergeleitete Nachricht --------
Betreff: 	Shortwave Radiogram, 21-24 September 2018
Datum: 	Fri, 21 Sep 2018 09:16:38 -0400
Von: 	Shortwave Radiogram <



Hello friends,

Thanks to everyone who participated in last weekend’s exercise to 
eliminate slant in MFSK images.Many of you did not see any slant to 
begin with. This usually happens with direct reception. But if reception 
is through an SDR, another sound card is involved, increasing the chance 
for a clash in the sampling rates. This tweet 
<https://twitter.com/SWRadiogram/status/1041607215428321280> shows how I 
was able to eliminate the slant during the first image of vertical 
lines, so that the lines were perfectly (at least to my eye) vertical 
during the second image.

Recording Shortwave Radiogram gives you another opportunity to eliminate 
any slant in your MFSK images. You can make the RX ppm adjustment in 
Fldigi, or use the Audacity software to change the speed of your 
recording. A (+)100 ppm adjustment in Fldigi would be the same as a 
(+).01% adjustment in the speed of your playback.

Videos of last weekend’s Shortwave Radiogram are provided by Scott in 
Ontario <https://youtu.be/XdjI26rSFiM> (Friday 2030 UTC), 2010DFS in 
Japan <https://youtu.be/qL7QFjl6tkk> (Saturday 1600 UTC) (see also his 
Twitter thread 
<https://twitter.com/jushin_Perseus/status/1040999966427078656> showing 
an inexpensive D-808 receiver connected to a Beverage antenna; his use 
of a voice recorder might have added additional slant, which he 
corrected in time for the second image of vertical lines), by Ralf in 
Germany <https://youtu.be/lLe16Un5o9I> (Saturday 1600 UTC). Mark in the 
UK <https://1drv.ms/f/s%21Ah7fj9CZV0zynm_IejUWLKL2Ye4v> maintains an 
audio archive. Roger in Germany 
<http://www.rhci-online.net/radiogram/SW_Radiogram_2018-09-15.htm> 
provided analysis.

This weekend’s Shortwave Radiogram will be in our usual combination of 
MFSK32, MFSK128, and MFSK64, with maybe a mystery mode (and mystery 
image – to save it, click Save) during the closing music. The show will 
include eight MFSK images.

*Here is the lineup for Shortwave Radiogram, program 66*, 21-24 
September 2018, in MFSK modes as noted:

1:38MFSK32: Program preview
2:55US requiring registration of Chinese media in the USA*
7:09MFSK128: Wasps play a crucial role in the ecosystem*
10:36MFSK64: TESS space telescope spots its first exoplanet*
13:35Remote island bounces back after its rats are eliminated*
19:19This week's images*
27:07MFSK32: Closing announcements

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Sonogram 7780 kHz:
====> 
https://www.dropbox.com/s/e1m06vnj447gqm6/2018-09-21_SWRG66_7780kHz.png?dl=0

roger