Re: [IRCA] 1040 wandering het: who is it?

[Brett Saylor <bsaylor@xxxxxxxxx>]

Fred,

I can confirm your bearing on this from central PA is also on a NW/SE line.
It's currently 2345 UTC (6:45pm ELT) and the signal's strength varies from
very strong to barely there. While the carrier doesn't seem to follow a set
pattern, watching it for a while shows one - the carrier seems to slowly
climb to a maximum frequency of around 1040.34, then slowly fall to a
minimum of around 1040.2, then do a quick reverse and start to climb again.
Here's a copy of the image from a screenshot:

http://www.radiodxing.com/images/1040%20khz%202354%20UTC%202-1-2010.jpg

That inflection point at the minimum is very pronounced each cycle. I don' t
know enough about AM transmitters to know what it might indicate, but maybe
others can detect something useful from it.
<http://www.radiodxing.com/images/1040%20khz%202354%20UTC%202-1-2010.jpg>

I can't hear any audio but will check back at various times of the day to
see if I can make anything out.

Brett Saylor
Central PA
Quantum QX Pro loop


On Wed, Jan 27, 2010 at 11:08 PM, Fred Schroyer <freditor@xxxxxxxxxxxxxx>wrote:

> Driving home a couple of weeks ago, I noticed a strange het on 1040. Its
> pitch rose & fell very slowly (spanning a couple of musical notes over a
> minute), through roughly an octave either side of middle C (in other words,
> maybe a hundred Hz up to several hundred), with no apparent pattern, just a
> gradual rising and falling. Kinda like a very, very slow moaning. The
> aimless frequency drift reminds me of an old tube oscillator with poor
> voltage regulation and no temperature compensation!
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