I have one way propagation with my Mother In Law -- all the time
She bellows like an elephant -- neighbors three doors away can hear her
I talk and she doesn't hear a word I say. Frequently QSK's me
Oh well reciprocity disproved.

Oh I can anticipate the responses to this one.


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news:PQQQd.31824$xt.14645@fed1read07...
I have one way propagation with my Mother In Law -- all the time
She bellows like an elephant -- neighbors three doors away can hear her
I talk and she doesn't hear a word I say. Frequently QSK's me
Oh well reciprocity disproved.

Oh I can anticipate the responses to this one.


Not a propagation problem I think :-)

Mother In Law's just don't come in full duplex , so she cant receive when
she is transmitting continuously...

In article ,
Gary wrote:

First off I don't really believe in one way propagaiton unless someone
can convince me otherwise ? However, I am curious about a phenomenon
I've experienced with a number or radios and antennas over the years.
I've had eveything from a 4 element Yagi at 55 feet to the dipoles I'm
using now and lots of new transcievers. I work all CW and on occasion
I'll get a 599 signal report from the other station yet he's barely
copyable from my end. They all seem to be running the same 100 watts
or more that I'm using now and are using a dipole cut for the
frequency in use like I am or a G5RV etc. I wonder if anyone else has
observed this and/or has an explanation ? This has occured on new
transceivers too numerous to name over the years. So I know its not a
problem with a particular radio.

73 and Thanks in Advance

Gary K8IQ

radio waves aren't garanteed a duplex path"" radiowaves are often
unpredictable, it's possible that natural phenom can't prevent or lessen
your signal to someplace, even thou that place comes in good to you

a ton of things can cauz this , i would ask why do you assume that
just because a path opens up to you , that you presume as matter of
fact that a path from you out must be the same?? (even if we presume
your set ups are identical)

Three possibilities:

1. One station is radiating more power than the other in the necessary
direction. This means elevation as well as azimuth angle. You may both
be applying 100 watts to an efficient antenna, but one might be
radiating a lot more than the other in the necessary direction. If both
sites have equal noise levels, the one radiating less power in the
necessary direction will have the weaker signal at the other end. This
is probably the most likely reason.

2. One station has a greater noise level. This might be because of
actually greater noise reaching his QTH, or it might be because the
other station's antenna has nulls in the directions where a substantial
amount of noise is coming from.

3. Unreliable reporting. You should take all signal reports with a very
big grain of salt. Different people have very different criteria for
what constitutes an S9, or even R5, signal.

All these can lead to dramatically different reports at the two ends of
the path, with no need for one-way propagation or violation of the
reciprocity principle.

Roy Lewallen, W7EL

On Wed, 16 Feb 2005 20:39:19 -0800, Roy Lewallen
wrote:

Three possibilities:

1. One station is radiating more power than the other in the necessary
direction. This means elevation as well as azimuth angle. You may both
be applying 100 watts to an efficient antenna, but one might be
radiating a lot more than the other in the necessary direction. If both
sites have equal noise levels, the one radiating less power in the
necessary direction will have the weaker signal at the other end. This
is probably the most likely reason.

2. One station has a greater noise level. This might be because of
actually greater noise reaching his QTH, or it might be because the
other station's antenna has nulls in the directions where a substantial
amount of noise is coming from.

3. Unreliable reporting. You should take all signal reports with a very
big grain of salt. Different people have very different criteria for
what constitutes an S9, or even R5, signal.

All these can lead to dramatically different reports at the two ends of
the path, with no need for one-way propagation or violation of the
reciprocity principle.

Roy Lewallen, W7EL

Thanks to Roy and all the others that responded and cleared this up
for me.

73 Gary K8IQ

On Wed, 16 Feb 2005 19:28:02 GMT, AB2RC
wrote:

takeoff angle also plays a big part in this. One station may have a lower
angle and be making only 1 hop to the other station, while the other station
may have a higher angle and be hitting the first station via 2 hops --
resulting in some signal loss.


I can see this.
--
73 for now
Buck
N4PGW

On Wed, 16 Feb 2005 22:48:31 GMT, "
wrote:


Even more important is accuracy of both "meters" and truth in reporting
Art

I know what you mean, but it wouldn't apply in this case. Unless a
meter were unstable. The mobile is sometimes the stronger of the two
and sometimes the weaker of the two. Often they are of similar
levels.

C Changes
Cin polarization in the ionosphere can easily explain the
Cabove if one station is horizontally polarized and QSOing
Cwith mobiles.

And, Cecil, would this not be true if both were of the same
polarization as well? If the polarization changes, it changes from
horizontal and would be vertical at the recipient's QTH.

Just a thought.


--
73 for now
Buck
N4PGW

Doesn't work that way.

"Buck" wrote in message
...

Here is my theory, as unsound as it may be. Think of a station with
100 watts using a TV dish style antenna talking to a person using just
a dipole with 100 watts. The dipole user will hear a much stronger
signal. However, on HF, we don't use dishes. Or maybe we do...

On Fri, 18 Feb 2005 16:34:09 -0800, "CW"
wrote:

Doesn't work that way.


LOL, short - sweet- and to the point. :)

Thanks

--
73 for now
Buck
N4PGW