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#1
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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. -- Caveat Lector (Reader Beware) Help The New Hams Someone Helped You Or did You Forget That ? |
#2
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"Caveat Lector" skrev i en meddelelse 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... |
#3
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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... |
#4
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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 |
#5
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On Wed, 16 Feb 2005 02:19:31 -0500, 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. It's just that big circulator in the sky. |
#6
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On Wed, 16 Feb 2005 02:19:31 -0500, 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. I run 9.5 Watts from a rare'ish grid square on 6m. Almost everybody else is running 100W or more. I get 5/9 reports from many, many S-3 to S-8 sigs. :-) If I give _my_ rpt first, I nearly always get the identical or better report from the other end. Seriously, tho'. I've seen One-Way-Is-FAR-MORE-Favorable-Than-The-Other propagation often -- on HF, and on 6M & 2M SSB. I don't really believe there is _no such thing as_ one-way propagation. 73 Jones -- | Marvin L Jones | jonz | W3DHJ | linux | Gunnison, Colorado | @ | Jonesy | OS/2 __ | 7,703' -- 2,345m | config.com | DM68mn SK |
#7
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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) |
#8
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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 |
#9
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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 |
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