Re: [IRCA] Wobbler 1100, again.

["W. Curt Deegan" <WWWR@xxxxxxxxxxxxx>]

Bob,

I've taken a slightly different tack listening to the Wobbler, based on 
your observations about fading.

I recently was forced to upgrade my PC -- the old one died -- and my new 
one has a rather over ambitious sub woofer, producing interesting results 
when connected to my RX-320.

What I have noticed is that when the 1100 RCH audio is coming in well, the 
Wobbler has a very obvious low frequency component that rumbles almost 
continuously, moving to higher tones when the wobbles become more 
extreme.  When RCH has faded out in preference to another station, while 
there may still be very loud and obvious higher pitched wobbles, the low 
rumble is more subdued.

What this tells me is that the basic fluctuations of the carrier which 
account for the rumble become less dominant in favor of heterodynes off 
other signals on and near the frequency, which produces higher pitched tones.

Based on this it does seem to me that as the underlying 1100 carrier fades 
out, so to does the direct affect of the Wobbler -- not nearly so much as 
the RCH audio, but somewhat none the less.  The persistent hets and the 
fact the sweeping carrier is far more well propagated than audio impressed 
on the carrier, leads me back to my original opinion of the Wobbler being 
an artifact of a fluctuating carrier as the most likely explanation.

I admit I'm swayed by having listened to many more, much less spectacular 
Wobblers, which fit more easily into that explanation.  Hearing only an 
Xtreme Wobbler tends to be misleading, I think.

I'm typing this as I'm thinking it through, so it may be a jumble, for that 
I apologize.  If it makes any sense to anyone, I'd loved to hear your take.

Curt
-------
W. Curt Deegan
Boca Raton, (southeast) FL

At 12:12 AM 1/27/2006, you wrote:

>Indeed I just got home, driving in from Tampa metro.
>Listened to the wobbler on 1100 from 2320 to 2335 est.
>Unlike a couple of days ago, at tune-in tonight, the Cuban
>on 1100 was totally missing with just a smudgy het
>on the freq, a trace of WTAM behind it. On 1120, KMOX
>was somewhat better than usual with nothing behind it, and
>on 1080 the usual Cuban pgm in a mix of signals one
>of which was probabaly KRLD. So the Cuban signals
>were somewhat worse tonight that they were a day or two
>ago.
>
>Despite that, the 1100 wobbler was clearer and stronger
>here in Tampa than I have heard in a while. It was steady
>and strong during the entire 15 minutes, during which the
>1100 Cuban went from totally inaudible, up to a reasonable
>level, in a slow gradual fade-up. The wobbler was present
>when there was no sign of any radio programming, from
>any station, also being audible.
>
>Also notable was the wobbler's periodicity (number of freq
>swings/sec) was all over the place, and the deviation
>was somewhat wider, ranging over several kHz of audio
>swing (pitch) in a random pattern, than recently.
>
>IF tonight's logging was the sum total of all my evidence,
>I would THEN have to say that there would be no way that the
>wobbler was linked to the 1100 Cuban xmtr. If it were, then
>why the fade patterns were so extremely different for an
>identical freq and path, would be unexplainable to me.
>
>But it is not outside possibility that this effect, being heard
>on known Cuban frequencies, has been _placed_ on those
>frequencies, as distinct from _appearing_ on those frequencies.
>
>I know there is a great deal of thought that links this thing
>to Cuban stations and I am not discounting that, however
>this apparent non-correlation of fade behavior is hard
>for me to understand. Listening was done on my Delco
>radio while driving. I can hear it inside on a RS portable
>but it's noisy enough indoors to mask some of the detail.
>
>When we move out of here it will be better.
>
>I hope others can note whether fading of the wobbler does
>or does not track fading of the audible radio signal that
>appears to be linked to it. The little I have observed is
>not indicative of very much.
>
>- Bob          sent 0012 est 27 jan


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