Topband: 160M LDE

[cris blak]

Hello Darrell,

That echo is your "long path" signal around the globe. On 160m is not so common but on upper bands it appears daily.

Weak up in the morning and listen to a local station on 10 or 14MHz and you'll hear theme on both path, directly and around the globe.
Cute sound anyhow.

This is not LDE, just SDE (shorth delay echo) which is well documented. With 100W is not so easy to get this phenomenon.
On 14 and 18MHz I heard SDE from JA also which is a bit different due to the direct long path. 

If you can measure precisely the delay from your signal and the echo than you can find the path length of that echo assuming the wave will have the speed of light. This is not always the case because in ionosphere the wave speed is lower than the speed of light but you can play with it.
If you'll do this, at least I'll be interested to hear the results.

Good luck.

73 de YO3FFF
Cristi



----- Original Message ----
From: "dbevan at datacheck.com" <dbevan at datacheck.com>
To: topband at contesting.com
Sent: Thu, January 21, 2010 12:14:59 AM
Subject: Re: Topband: 160M LDE

I have recently experienced an echo on 160M that is 
delayed only a fraction of a second, I would rather refer 
to it as backscatter. Since using a FlexRadio 1000 I have 
been able te receive weak signals only a few ms after 
letting up the key. I noticed this during periods of 
extreem QSB while sending CQ. When the echo was heard I 
got calls from EU. When the echo was not there I got no 
replies. The echo was only heard on my EU Beverage 
antenna.

Has anybody else heard this? It may be a good indicator 
that the band is open over the pole.

Darrell, N6DX

  
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UR RST IS ... ... ..9 QSB QSB - hw? BK