[Elecraft] 80m "Reflector" problem

[Jerry Hancock]

Thanks for the response.  If it is an LDE, it is awfully consistent.  I can
hear it all the time now on 80m, at least for the past three days.

Jerry , KG6KGP

-----Original Message-----
From: Guy Olinger, K2AV [mailto:olinger at bellsouth.net]
Sent: Tuesday, June 15, 2004 3:10 PM
To: svholm2 at broadpark.no; jehancoc at pacbell.net; elecraft at mailman.qth.net
Subject: Re: [Elecraft] 80m "Reflector" problem

LDE's can be quite long. There were some notable one's reported in the
last WPX contest.

One happened to me. On 40 meters I was working a Guam station from the
east coast, and had been hearing short echoes for a while.

I sent my contest exchange, the other station QSL'd it and sent his
end of contact CQ. That was followed by the LDE of my contest exchange
in its entirety, which he QSL'd again. Which left ME a bit confused
until I figured out what I had heard. Wish I had a recording of that.
Easy to know it was my exchange because WPX exchange has a serial
number in it.

At this point, I'd guess that was delayed by better than two seconds,
but could not say for sure. That would be some number of times going
around the earth.

Over the years I have heard the once around the earth delay many
times. That one takes about the time of a sent dit, and is very
confusing if you are using QSK. These can be very strong, and have
heard it using the FT1000MP barefoot. Most often whatever path it is
lasts 3-4-5 minutes and fades away.

73, Guy.

----- Original Message -----
From: "Sverre Holm" <svholm2 at broadpark.no>
To: <jehancoc at pacbell.net>; <elecraft at mailman.qth.net>
Sent: Tuesday, June 15, 2004 3:16 AM
Subject: RE: [Elecraft] 80m "Reflector" problem


> > I made several recordings ( I can forward them)  and it looks
> > like the signal is always approximately 1.52 seconds delayed
> > and lasts about 1 second.  It can't be long path propagation
> > since 1.52 seconds works out to about 282,000 miles.
>
> It sounds as if you have experienced a long-delayed echo.
>
> But, then 1.5 seconds is longer than the typical LDE on 80 meters.
The
> usual phenomenon in that band is via a travel path through the
> magnetosphere, and a delay of max 0.5 seconds. See phenomenon no. 1
on
> http://heim.ifi.uio.no/~sverre/LDE/
>
> --
> 73,
> Sverre