Tag Archives: Chinese radio

Log: AM broadcast band, September 30th, excellent trans-Pacific reception

Between work and being sick for a week, I haven’t had a chance to post anything about the current trans-Pacific reception season. But, it has been a pretty good one, and this day provided the best audio of the season.
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Log: AM broadcast band, March 10th, good trans-pacific reception

Although I was making an SDR recording, I also worked this one live. Activity was already in progress when I started a little before 1200 UT (5am MST), and this turned into quite good reception. It started out mostly on the low-end of the band, but the upper-end kicked in by around 1225 UT. The best activity was during the 12UT hour, with a decrease near the end of the hour. Some stations were doing pretty well after 13UT, including 1566 HLAZ out of Korea, but in general activity wasn’t very good then. Activity totally fizzled out by local sunrise at 1347 UT (6:47am). The real surprise was the strength of 1134, presumably HLKZ out of Korea, producing brief bursts of fair audio. First a summary, then some audio samples. Continue reading

Log: AM BCB, March 12th, trans-Pacific reception

AM broadcast band DXing with:
Antenna 1: 6-foot diagonal wooden-frame tuned loop
Antenna 2: 23-foot “fishing rod” vertical with MFJ-1020C amplified pre-selector
Combiner: Quantum Phaser
Receiver: RTL-SDR dongle, Ham It Up upconverter into laptop

This was mostly a low-band morning, and some of the best conditions I’ve had this year. It didn’t get off to a particular early start, but after 5am MST (12UT), things were hopping.

I finally got intelligible audio from NHK Radio 2 during their weekday English lessons (late in the evening in their time zone). I’m not sure if “Were you taken to the hospital?” is necessarily a common phrase, but that’s the first English audio I’ve received on the AM band from overseas at 5:22am MST (1222UT):

Here’s some more typical Japanese language fare an hour later:

Most of the rest of the audio is more about getting audio at all, rather than sound quality. I picked up two presumed Korean stations, 972-HLCA (new) and 1566-HLAZ. I caught some music into conversation on the former at 6:04am (1304UT), just enough to think it was Korean language:

I’ve had much better audio on 1566 earlier this month, but for completeness, here is a sample from 6:30am (1330UT):

NHK 2 has other transmitters besides 774 kHz, and I was able to finally get some weak audio on 747-JOIB. (Presumably, of course, since I didn’t hear an identification, but it is highly likely.) Here is a sample from 6:23am (1323UT):

I also picked up the presumed China National Radio station on 1593 kHz, with just enough signal to produce weak audio at 6:30am (1330UT):

I also could see carriers on the SDR display on a bunch of frequencies that were too weak to produce audio, including: 693, 738, 765, 828, 864, 873, 945, 963, 981, 1422, 1503, 1521, and 1557. There may have been others, but with my tuned antenna system, I can only peak up a limited range of frequencies at any given time. Thus, even going through the SDR recordings, I can’t check the entire band.

Log: AM BCB, March 5th, first look at more trans-Pacific reception

AM broadcast band DXing with:
Antenna 1: 6-foot diagonal wooden-frame loop
Antenna 2: 23-foot “fishing rod” vertical with MFJ-1020C amplified pre-selector
Combiner: Quantum Phaser
Receiver: RTL-SDR dongle, Ham It Up upconverter into laptop

I did an unattended SDR recording and there was a major enhancement of trans-Pacific reception around 6:30-6:45am (1330-1345UT), just before local sunrise. This was just with my 6-foot loop. I may do a longer post sometime, but for the moment, a representative recording of 1566-HLAZ out of Korea at 1340UT, not necessarily the best possible time:

And, presumed China National Radio at 1593 kHz, but very weak, also at 1340UT:

Log: AM BCB, January 22nd, major trans-Pacific opening

AM broadcast band DXing with:
Antenna 1: 6-foot diagonal wooden-frame loop
Antenna 2: 23-foot “fishing rod” vertical with MFJ-1020C amplified pre-selector
Combiner: Quantum Phaser
Receiver: RTL-SDR dongle, Ham It Up upconverter into laptop

Two mornings previous, I picked up decent audio from HLAZ in South Korea. On the 22nd, there was a major opening to Asia, with HLAZ again, but also many other stations with audio or at least carriers. Continue reading