[Lowfer] 650 khz Cuban wobbler

[Dexter McIntyre w4dex]

craig wasson wrote:
> This one looks like a malfunction - as mentioned the normal audio
> fades out just before it appears.  I think it's an oscillation in the
> audio stages - most likely it is sweeping back and forth outside the
> audio bandpass for a while, then narrows down to be in the passband
> until it drops to zero.
>   
The wobble modulation isn't from WSM's signal.  It's suspected to be 
caused by the wobbling carrier of a Cuban station beating with WSM's 
carrier.  The wobble is best heard here in NC when WSM's signal goes 
into a deep fade when the other carrier is present and wobbling. 

The suspected Cuban station is called CUB Radio Progreso.  One reference 
I found indicates the power to be 200 kw.  Here's a link showing the 
location on Google maps:

	
	

https://maps.google.com/maps?t=k&hl=en&ie=UTF8&ll=22.375555,-78.887136&spn=0.014167,0.030663&z=16&vpsrc=6

Look at all those towers!  There must be multiple stations transmitting 
from this site.

If the wobble is from the Cuban station it should be heard very well in 
south Florida received in CW or SSB mode.  I'm going to contact someone 
I know down that way to see what he receives.

Dex