Hello friends
Shortwave Radiogram listeners have kindly offered suggestions for experiments with our digital modes. Tobias in Germany suggests that eliminating the brief silence (about 0.6 seconds). between the text introduction of an MFSK image and the image transmission, can reduce or eliminate missed image headers. This is because there is no interval of silence that can result in random characters that might interfere with the header.
On this weekend's Shortwave Radiogram, the silent gaps before the MFSK64 images will be eliminated. The gap will still exist between the text and the MFSK32 image near the beginning of the program.
Also, during most of the five-second delays after the RSID when modes change (to provide time for a manual mode change if necessary), 1500-Hz tones will be inserted instead of silence. This might eliminate the stray characters that can be annoying.
A video of last weekend's Shortwave Radiogram (program 210) is provided by Scott in Ontario. The audio archive is maintained by Mark in the UK. Analysis is prepared by Roger in Germany.
Here is the lineup for Shortwave Radiogram, program 211, 1-4 July 2021, in MFSK modes as noted:
1:41 MFSK32: Program preview
2:58 Christopher describes the heat wave in Oregon*
7:11 MFSK64: Hot nights hurt rice crop yields
10:51 This week's images* **
28:35 MFSK32: Closing announcements
* With image(s)
** As an experiment, the short silence between the text
introduction and image has been eliminated. This might reduce the
incidence of missed image headers.
Please send reception reports to radiogram@verizon.net
And visit http://swradiogram.net
Twitter: @SWRadiogram or https://twitter.com/swradiogram (visit during the weekend to see listeners' results)
Facebook group: https://www.facebook.com/groups/567099476753304
Shortwave Radiogram Gateway Wiki https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
Shortwave Radiogram Transmission Schedule
UTC Day UTC Time Frequency Transmitter
Thursday 2330-2400 UTC 9265 kHz WINB Pennsylvania
Friday 1300-1330 UTC 15770 kHz WRMI Florida
Friday 1500-1530 UTC 15750 DRM WINB Pennsylvania
Saturday 0230-0400 UTC 9265 kHz WINB Pennsylvania
Saturday 1330-1400 UTC 15770 kHz WRMI Florida
Sunday 0800-0830 UTC 5850 kHz 7730 kHz WRMI Florida
Sunday 2330-2400 UTC 7780 kHz WRMI Florida
The Mighty KBC transmits to North America Sundays at 0000-0200 UTC (Saturday 8-10 pm EDT) on 9925 kHz, via Germany. A minute of MFSK is at about 0130 UTC. Reports to Eric: themightykbc@gmail.com. See also http://www.kbcradio.eu/ and https://www.facebook.com/TheMightyKbc/.
“This is a Music Show” Most of the show is a music show, but the host transmits some MFSK-64 text and images near the end of the broadcast. It’s transmitted on WRMI, Thursdays at 0200-0300 UTC on 5850 kHz (Wednesday evening in the Americas). Also look for a waterfall ID at the beginning of the show. thisisamusicshow@gmail.com www.twitter.com/ThisIsAMusicSho/ @ThisIsAMusicSho https://thisisamusicshow.com
New York and Pennsylvania NBEMS nets. Most weekends, as KD9XB, I check in to the New York NBEMS (Narrow Band Emergency Messaging Software) net Saturday at 1200 UTC on 3584 kHz USB, and the Pennsylvania NBEMS net Sunday at 1130 UTC on 3583 kHz USB. Check-ins are usually in Thor 22, and messages are in MFSK32. Messages generally use the Flmsg add-on to Fldigi. If you are a radio amateur in eastern North America, feel free to check-in. Outside the region, use an SDR in the eastern USA to tune in and decode. You do not need Flmsg to check in, and most of the messages can be read without Flmsg. If you can decode the net, send me an email to radiogram@verizon.net , or tweet to @SWRadiogram, and I will let them know you are tuned in. USEast NBEMS Net: Please also note the USEast NBEMS Net, Wednesdays 2300 UTC (7 pm EDT) on 3536 kHz USB.
Thanks for your reception reports!
Kim
Kim Andrew Elliott, KD9XB
Producer and Presenter
Shortwave Radiogram
Reporting on international broadcasting at https://twitter.com/kaedotcom
