Hello friends,

For the summer, Shortwave Radiogram remains at the same UTC times. In North 
America, where daylight time is observed, the broadcasts are one hour ahead by 
local time, e.g. Sunday 4:30 and 7:30 pm and Monday 4:00 am EDT. (Summer time 
begins 25 March in Europe.)

Last week's experiment with MFSK32 images transmitted at half speed, designed 
by Mark Braunstein WA4KFZ, produced interesting results. There were several 
examples of the half-speed images, decoded at full speed, providing higher 
quality images, as predicted. (See, hear, and decode one example.) In some 
cases, usually when the full speed image was good to begin with, any 
differences were not detectable.

The results could be biased by the signal improving or deteriorating from the 
time of the full-speed transmission to that of the half-speed transmission. We 
can correct for that (and probably will in a future broadcast) by transmitting 
both at the same time but at different center frequencies.

This weekend we will try something similar: text and an image transmitted 
concurrently but at different center audio frequencies. The text will be 
broadcast at the usual 1500 Hz. The image will be transmitted centered on 2200 

(The text transmission is on your spectrum from about 1250 to 1750 Hz. On the 
waterfall, sometimes you will see the second harmonic of the text 
transmission,which is from 2500 to 3500 Hz. The frequency of 2200 Hz is used 
for the image because its trace from 1950 to 2450 Hz completely escapes any 
interference from that second harmonic.)

You can decode the text and image simultaneously by running two instances of 
Fldigi. Or record the broadcast and decode the image later.

There will be no RSID transmitted at the beginning of the image on 2200 
Hz.However, there will be a 15-second tuning signal to help you set Fldigi to 
the correct center frequency. The tuning signal begins at 12 minutes, 44 
seconds into the broadcast.

Because transmitting both text and an image increases the amplitude of the 
audio, I reduce it during the dual transmission to reduce the chance of 
breaking a transmitter. If your text decode is not as good during the dual 
transmission,please let me know.

The image will also be transmitted as usual on the usual 1500 Hz center 
frequency after the text of the news item about (appropriately enough) noise 

Here is the lineup for Shortwave Radiogram, program 39, 17-18 March 2018, all 
in MFSK32:

1:32 Program preview
3:26 Urban mining to reuse materials*
12:14 Polluting the world with noise**
20:39 Chinese lunar satellites will include amateur radio*
27:04 Closing announcements

* with image
** with the image at 2200 Hz and again after the text at 1500 Hz
Please send reception reports to radiog...@verizon.net
And visit http://swradiogram.net
Facebookgroup: https://www.facebook.com/groups/567099476753304

Shortwave Radiogram Program 39 (17-18 March 2018)
1600-1630 UTC 9400 kHz MFSK32 Space Line, Bulgaria 
2030-2100 UTC 7780 kHz WRMI Florida
2330-2400 UTC 7780 kHz WRMI Florida 
0800-0830 UTC 7730 kHz 5850 kHz WRMI Florida 

The Mighty KBC transmits to Europe Saturdays at 1500-1600 UTC on 9400 kHz (via 
Bulgaria), with the minute of MFSK at about 1530 UTC (if you are outside of 
Europe, listen via websdr.ewi.utwente.nl:8901/ ). And to North America Sundays 
at 0000-0200 UTC (Saturday 7-9 pm EST) on 6150 kHz, via Germany.The minute of 
MFSK is at about 0130 UTC. Reports to Eric: themighty...@gmail.com . See also
http://www.kbcradio.eu/ and https://www.facebook.com/TheMightyKbc/.

Italian Broadcasting Corporation (IBC) For the complete IBC transmission 
schedule visit http://ibcradio.webs.com/ Five minutes of MFSK32 is at the end 
of the 30-minute English-language “Shortwave Panorama,”per the schedule below

2025-2030 UTC 5845 kHz Europe, Middle East, Asia
0125-0130 UTC 5950, 11580 kHz Americas
0225-0230 UTC 9955 kHz Americas 
0255-0300 UTC 5985 kHz Americas
0155-0200 UTC 5850, 5950, 9395, 9455 kHz Americas
0055-0100 UTC 7730 kHz Americas
1155-1200 UTC 6070 kHz Europe

Thanks for your reception reports!

Kim via KKX

Kim Andrew Elliott, KD9XB
Producer and Presenter
Shortwave Radiogram
Reporting oninternational broadcasting at https://twitter.com/kaedotcom

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