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Re: AO-40 AGC study,please read it!




Wayne
I've noticed this too.   What I've found sometimes is that it's just Leila 
down the band a little so you won't hear her alarm, but you're still close 
enough to be notched.



At 10:26 AM 1/15/03 -0600, Estes Wayne-W10191 <W10191@motorola.com> wrote:
>Has anybody identified the cause(s) of sudden drops in the AO40 downlink 
>signal strength?  I'm talking about when everything is working fine, and 
>then the signal SUDDENLY drops by ~10 dB for ~30 seconds, and then 
>SUDDENLY returns to "normal".  The duration of the drop is longer than a 
>typical LEILA attack, and I can't hear a LEILA siren when I tune up and 
>down a few kHz.
>
>What do you guys with panoramic receivers see in the passband when 
>everything suddenly drops 10 dB?  Has anybody noticed a geographic pattern 
>when this occurs and doesn't occur?  I suppose this could be caused by an 
>extremely powerful SSTV or RTTY station.  Or perhaps the offending signal 
>is NOT a ham?
>
>Wayne Estes W9AE
>Mundelein, IL, USA
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