Re: [A-DX] Log: 9479, WTWW, USA, SIO 333, 22:28 UT

["Wolfgang Bueschel" <BueschelW@xxxxxx>]

Augenscheinlich korrekt ?

wb

Starting today WTWW has shifted to 9479 kHz! George McClintock tells me
the FCC has OK'd it. The reason is an unexpected interference problem very
near the transmitter site. The school system of Smith County has a remote
receiver on a mountaintop which happens to use 151.680 MHz, and the
sixteenth harmonic of WTWW 9480 kHz has been interfering. WTWW harmonic is
properly more than 80 dB suppressed, but in this circumstance it is not
enough. Until a new harmonic filter can be installed, by shifting to 9479
kHz WTWW moves the harmonic far enough off to 151.664 MHz.

The 'tone' is a heterodyne of 1 kHz which now results from other stations
still on 9480.0 kHz, no longer YFR via Germany, but CRI via Albania at
1800-2000 UT in French. Voice of Russia might also be using it after that
time, and China at other times. It is certainly audible, not subaudible.
This is not 'crossmodulation' either.
(Glenn Hauser-OK-USA, dxld March 31, 2010)

----- Original Message ----- 
From: "Christoph Ratzer" <dx@xxxxxxxxx>
Sent: Saturday, May 15, 2010 12:28 AM
Subject: [A-DX] Log: 9479, WTWW, USA, SIO 333, 22:28 UT


> Gerade Frequenzen waren wohl nicht zu haben?
>
> 73 Christoph
>
> --
> www.a-dx.at
> www.internet-radio.at

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