At 1/30/2005 07:11 PM, you wrote:
>I wish to say thanks to all who replied on my issue with the transmit
>problems. After looking at everything on the repeater, it has
>cleared itself up. I talked with a few other repeater owner's, and
>it seems that everyone was suffering. We have related it to weather
>and propagation. The last two days everything has been back to
>normal, repeater is heard it's normal range. Why the recieve was not
>affected is strange, but it works out that way. Again Thanks.
>
>Mathew
While I've not experienced this myself, I've had hams in the Ventura/Santa
Barbara area tell me that they've witnessed signals from line-of-sight
systems simply go away at times. That area is highly influenced by tropo
ducting, so maybe there is a connection - if ducts can steer RF into areas
far beyond line-of-sight, maybe they can also steer signals AWAY from
normal line-of-sight areas?
I have no explanation as to why your RX wasn't affected unless the same
tropo conditions steered away the atmospheric noise that normally dominates
2 meters; with both signal & noise reduced the overall S/N change at your
low noise RX would be minimal. This would be quite an interesting study
for anyone interested in VHF propagation & radiometry.
Bob NO6B
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