Re: [HCDX] Mediumwave echo ?

[Henrik Klemetz <hklemetz@xxxxxxxx>]

Hi John and Chuck,
Why not consider another down-to-earth option, a
second transmitter on this channel, located somewhere
else in Cuba?
Henrik

--- J999w@xxxxxxx skrev: > Hello 
all,
> 
> I was reviewing a recording I made of Radio Rebelde,
> Cuba from October 3, 
> 2002 at approximately 0100z on 900khz and heard
> something interesting. What 
> was initially a normal sounding signal, developed an
> echo that lasted for 
> about 3 minutes, then dissapeared, reverting back to
> normal again. 
> 
> Using CoolEdit software, I measured the delay to be
> 450milliseconds. I wonder 
> what could have caused this delay ? Did it originate
> in the transmitted audio 
> such as a satellite delay, or is it a propagation
> phenomenon? Reading through 
> the literature, I learned that the longpath
> propagation delay in on the order 
> of 130milliseconds.
> 
> I have a short audio clip at:
> http://members.aol.com/j999w/DX
> 
> Any ideas?
> 
> 73!
> 
> John Wilke
> WB9UAI
> Milwaukee
> R71a and vertical
> 
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THE INFORMATION IN THIS ARTICLE IS FREE. It may be copied, distributed
and/or modified under the conditions set down in the Design Science License
published by Michael Stutz at http://dsl.org/copyleft/dsl.txt