Lee and the group,
Reports of LDEs have always fascinated me. The only echos I have heard
were probably round-the-world or auroral distortions on high power 20
meter SSB stations.
I am trying to do an analysis of the reported LDEs on 160 and 80 meters
with echo times in the hundreds of milliseconds. Can you provide me
with the following information on your experiences:
1. Callsign of transmitting station and TX power, frequency and mode.
Also, was QSK in use?
2. Location (latitude and longitude or grid square of transmitting station).
3. UT Date and time of LDE
4. Callsign(s) and location(s) of receiving station(s). Was the echo
only heard by relatively nearby stations?
5. TX and RX antennas of all stations (N6TR's recent comment about
stronger echos with a low dipole was very interesting)
6. Estimated time delay of the echo
7. Estimated duration of the time the LDE was heard (just once, minutes,
hours, etc.)
8. Was there any frequency shift between the transmission and the echo?
9. Any other anecdotal information about the event.
Please reply to me privately in order not to clog up the reflector. I
will summarize the reports and make a posting back to the reflector later.
73,
Walt, AJ6T
On 2/8/2017 9:41 AM, Lee STRAHAN wrote:
Greetings All,
I am afraid I have to take issue with you Wolf. And this may be a clue. I
also have experienced echoes on 160 meters. Maybe it depends on longitude or
latitude or something like that. N6TR not being too far away has also
experienced them. All that being said I am positive due to my observations
that a short delay has occurred here twice. During the one event one station
sent me a message asking what was wrong with my signal. Tests confirmed there
was nothing wrong with the signal and the echoes slowly faded away.
Unfortunately I did not have the presence of mind to determine directionality
or make a recording. The echoes were quite strong and lasted for several
minutes. Guessing would put them at less than 100 mSec separation. My first
thought at the time was that my receiving array was failing in some strange
mode but that was definitely not the case.
Lee K7TJR OR
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Dr. Wolf
Ostwald
Sent: Tuesday, February 07, 2017 10:15 PM
To: topband@contesting.com
Subject: Topband: LDEs, witches and magicians
hello reflectees,
i never ever experienced echoes on 160. And i do a lot of transmitting and have
relatively sensitive rx systems.
Given the laws of field expansion and attenuation i consider it a hoax.
I have had round the globe echoes on 20m. But was using 6 el monobander with
power and at the rite time, when we had greyline. Sometimes 2 to three rounds.
That was physically explainable.
Anything else is from the land of Alice.
73 de wolf df2py
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