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KA3BVJ > SWL 07.05.23 12:20l 70 Lines 4494 Bytes #999 (0) @ WW
BID : 48910_KA3BVJ
Read: GUEST
Subj: Shortwave RadioGram
Path: IW8PGT<I3XTY<I0OJJ<EA2RCF<LU9DCE<VE3CGR<WG0A<W9GM<KA3BVJ
Sent: 230507/1117Z 48910@KA3BVJ.#EPA.PA.USA.NOAM BPQ1.4.65
Hello friends
Our transmission on Saturdays, 2300-2330 UTC, 7570 kHz from WRMI Florida, has been suffering from wide-band interference on the same frequency. The interference is intermittent: sometimes it's there, sometimes not, sometimes it lasts for several minutes, sometimes just for a few seconds. Anyway, Glenn Hauser, on his World of Radio program, reported that he was checking a shortwave frequency list, where he found "CGA984 - HF trading from Canada." One of its frequencies is 7570.
HF trading is high-frequency trading. The "high-frequency" does not refer to the spectrum from 3 to 30 MHz, although it does sometimes use HF radio, but rather to the fact it "uses powerful computer programs to transact a large number of orders in fractions of a second," according to Investopedia. Radio is faster than the internet or telephone lines, by fractions of a second, and thus provides an advantage to high-frequency traders.
Benn Kobb provides this list of all the frequencies available to this HF trading operation, licensed in Canada and located in Harrow, Ontario, near Detroit. This would explain why the signal on 7570 is usually strong via SDRs in Michigan.
This is what the noise looks like on an SDR. It doesn't look or sound like data, but there must be some method to this. I don't think that well-defined signal at 7558 is part of the HF trading operation, but I'm not sure about that.
The FCC and Canada's CRTC will have to sort this out. We might experience noise on 7570 for at least one more weekend.
A video of last weekend's Shortwave Radiogram (program 302) is provided by Scott in Ontario (Friday 1300 UTC). 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 303, 4-9 May 2023, in MFSK modes as noted:
1:36 MFSK32: Program preview
2:42 MFSK32: Russia will remain on ISS until 2028
6:04 MFSK64: Chicago will sell its water*
10:01 MFSK64: This week's images*
27:41 MFSK32: Closing announcements
* with image(s)
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
Friday 0030-0100 9265 kHz WINB Pennsylvania
Friday 0530-0600 7780 kHz WRMI Florida
Friday 1300-1330 15770 kHz WRMI Florida
Friday 1400-1430 15735 kHz DRM WINB Pennsylvania
Saturday 0330-0400 9265 kHz WINB Pennsylvania
Sunday 2330-2400 7570 kHz WRMI Florida
Monday 0800-0830 5850 kHz WRMI Florida
Tuesday 1430-1500 9955 kHz WRMI Florida
The Mighty KBC has expanded its transmission schedule. Times are UTC, frequencies are kHz, all from WRMI Florida:
Sunday 0000-0100: Dave Mason 9455
Sunday 0100-0200: Eric van Willegen 9455
Sunday 0200-0300: Eric van Willegen 5850
Sunday 2100-2200: Dave Mason 5950
Sunday 2200-2300: Eric van Willegen 5950
Wednesday 1600-1700: Eric van Willegen 15770
Friday 1100-1200: Eric van Willegen 15770
Saturday 0200-0300: Dave Mason 5850
Saturday 0800-0900: Eric van Willegen 7780
A minute of MFSK64 is at about 30 minutes past the hour on at least some of the Eric van Willigen programs. 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 image near the end of the broadcast. Its 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
Pop Shop Radio from British Columbia, Canada, includes "a whole variety of pop music, such as records from the 1960s and 1970s that were played on Top-40 radio stations not only in North America but also on offshore radio and stations like Radio Luxembourg." The programs now include some MFSK text and an image. Website: popshopradio.ca. Twitter: @popshopradio1 Email: radiopopshop@gmail.com.
Thanks for your reception reports!
Kim Andrew Elliott, KD9XB
Producer and Presenter
Shortwave Radiogram
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