[HCDX] 1470 kHz monitoring

[Mark Hattam <mark@xxxxxxxxxxxxxxxxxxx>]

Over the past few nights I've been monitoring 1470 kHz using audio 
analysis to "watch" the various carriers fade-in, sign-off or 
fade-out. It's a very busy channel with many carriers slightly offset 
from each other.

Fade-in has been as early as 2130 when only Brazil or Argentina is 
realistically possible, and mostly the strongest signal has been CPN, 
Lima, Peru peaking 0300-0330 UTC.

Does anyone have a list of Brazilian MW stations with sign-off times? 
Or in fact other South American countries too ...

I've uploaded the spectral traces onto my website
http://www.dxradio.co.uk/mwoffsets/index/html

The rig is a AOR 7030+, with a 40-inch square MW loop, and the audio 
analysis is done using Spectrum Lab. I've tuned to 1469.000 kHz in 
usb and analysed the audio from 925-1075 Hz ... 1000 Hz would 
correspond to a zero Hz offset on 1470.000 kHz obviously.

CPN Lima would appear to be the station registering on 995 Hz on the 
scale, ie 1469.995 kHz given its fade-in time and peak.

73s
Mark Hattam
London, England.

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