Utility Planet is the official blog for the column of the same name in The Spectrum Monitor. It replaces Utility World in the discontinued Monitoring Times magazine. Utilities are all VLF/LF/MF/HF (and sometimes low-band VHF) radio communications except broadcasting, CB, and non-emergency amateur. If you understood the last sentence, you know enough to read this blog.
Friday, April 22, 2016
Hopefully no RHC co-channel with VOA Radiogram for April 23-24
From Kim Andrew Elliott:
Last weekend, Radio
Habana Cuba had a special transmission on 17580 kHz, creating an
interesting co-channel situation with VOA Radiogram Saturday at
1600-1630. RHC caused only minor interference in Europe,
but in parts of the Americas, decoding VOA Radiogram was difficult. In
this video by Tim in Colorado, VOA Radiogram and RHC are fairly evenly
On the other hand,
some listeners were not as successful with Olivia 64-2000, and found
that this mode did not perform as well as MFSK32 – which is much faster.
I wonder if the problem is related to the receiver’s
bandwidth. Olivia 64-2000 extends to 2500 Hz above and below the
carrier. If any of that data is “clipped,” the decode might be less than
100%. We could try some experiments with this in future programs.
This weekend, all
the content will be in MFSK32, except for the transmission schedule in
Olivia 64-2000 mixed with the closing music.
Here is the lineup for VOA Radiogram, program 160, 23-24 April 2016, all in MFSK32 except where noted:
1:34 Program preview
2:44 Can AC and DC power integrate?*
12:13 Radio Farda TV signal jammed in Iran*
16:38 New report finds media freedom declined globally*
26:53 Closing announcements*
28:17 Olivia 64-2000: Frequency schedule under music
* with image
Please send reception reports to email@example.com.
VOA Radiogram transmission schedule
(all days and times UTC):
Sat 0930-1000 5745 kHz
Sat 1600-1630 17580 kHz
Sun 0230-0300 5745 kHz
Sun 1930-2000 15670 kHz
All via the Edward R. Murrow transmitting station in North Carolina
The Mighty KBC
will transmit a minute of MFSK32 Sunday at about 0220 UTC (Saturday
10:20 pm EDT) on 6040 kHz, via Germany. This is part of KBC’s North
at 0000-0300 UTC. Reception reports to Eric:
DigiDX will transmit DX news in MFSK32 and perhaps other modes: