re Son Tay history of faulty accompanied strings some 28 kHz away on both frq sides.
that' on the faulty reserve 6th tx unit at Hanoi Son Tay transmission sender – in use today. vy73 wolfie df5sx wwdxc VIETNAM Voice of Vietnam Son Tay site intermodulation on odd 11913.43 kHz I've seen this for a few days on many KIWI sdrs. Seems in parallel with VoV on 11885 kHz. With strongest signal on Uni Enschede Twente SDR but it is audible all over Europe but barely audible in all-Asia/Pacific region. Presumed to be a spur from Son Tay, Hanoi transmitter. As I write this I see it also on odd frq 11856.52 kHz. (Dave Hughes, wor March 12, 2026) Re: Voice of Vietnam Son Tay intermodulation on 11913.43 kHz. That's not new spurious matter of o n e of the 6 x SW transmitters in Son Tay bcasting center. Happened few times in past decade also. VIETNAM 11885 kHz Some bad accompanied audio strings happened again on the VoVTN outlet from Son Tay, French service at 19.00-19.56 UT. Happened some ? 5 years ago in 31 mb of Son Tay TX outlet. Today April 2025 heard VTN Son Tay on exact 9730 kHz underneath CRI Portuguese on CO-CHANNEL bad fqy coordination. 11885 kHz Son Tay suffered by bad sideband strings heard and seen 7, and 9 and 17.5 kHz apart away distance on both sidebands too. 11903 kHz approx. too. on even 11895 kHz CRI Kashi in Cantonese language also cover- ed. [selected SDR options, span 12.5 kHz RBW 15.3 Hertz] (wb df5sx, wwdxc BC-DX TopNews April 1, 2025) and in May 2021 too: VIETNAM To: Phong Tieng Duc Ban Doi Ngoai <deutsch_vov -at- yahoo.com> Side broadcasts from 9730 kHz Hanoi Son Tay. Dear editors of the German broadcasts, I wanted to let you know that your station on the frequency 9730 kHz also has side emissions on 9704 and 9754 kHz that can be heard in Europe. The main frequency is currently (1850 UTC) 35433. Best regards, Dr. Hansjoerg Biener-D, May 12, 2021. Re: Side emissions from 9730 kHz Hanoi Son Tay bcast center. Hj. These are the old Made in USSR transmitters, around 30 years old, in the Son Tay transmission center west of Hanoi. One of the six transmitters has a control fault and produces audio track strings, always 8 kHz apart, like a garden fence - visible on the software screen, e.g. in the Perseus RX screen. This has been happening on and off for at least a decade, recently more often in the 41 mb around 7280 kHz, but mostly in the 31 meter band, when the 5th / 6th - faulty - transmitter is in use. Tonight, 9730 kHz is actually covered by a 500kW system, by CRI Portuguese music program from the center of Kashi-Kashgar, powerhouse S=9+50dB or -21dbm, a really crazy strong signal from Kashgar Tibet, on the Kyrgyz Republic border. The German-now English-program from Hanoi Son Tay is best heard today on 9706 and 9754 kHz, from 16:00 to 22:00 UT; otherwise the garden fence on both sides, shows exact transmitter strings at the 9738, 9746, 9754, and 9762 kHz frequencies upperside, and 9690, 9698, 9706, 9714, and 9722 kHz frequencies lowerside. [selected SDR options, span 12.5 kHz RBW 15.3 Hertz] (wb df5sx, wwdxc BC-DX TopNews May 12, 2021) -----Ursprüngliche Nachricht----- From: franckbaste via groups.io Sent: Wednesday, June 10, 2026 9:03 PM : [email protected] Cc: [email protected] To Subject: [bdxc-news] Voice of Vietnam on 11913.4kHz I'm currently listening to the Voice of Vietnam on 11913.45 kHz. (1900UTC) The program is in English The signal is rather weak in France, but perfectly understandable. 73s Franck F4LKC (Icom IC-756proIII Dipole 2 X 10m.) _ Hard-Core-DX mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/hard-core-dx http://www.hard-core-dx.com/ _______________________________________________ THE INFORMATION IN THIS ARTICLE IS FREE. It may be copied, distributed and/or modified under the conditions set down in the Design Science License published by Michael Stutz at http://www.gnu.org/licenses/dsl.html
