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R: RE: L1



Rick, Kevin and Stacey,

Great pass on L1 and L2 from MA 116 to 240 this morning on AO40
orbit 827

CW and SSB where not affected by rumble/warble effects and signals
sounded very...... very clean ! !

73" de i8CVS Domenico


----- Original Message -----
From: Rick Vidmar - K9KK <k9kk@earthlink.net>
To: Amsat Bulletin Board <amsat-bb@AMSAT.Org>
Sent: Sunday, August 18, 2002 4:52 PM
Subject: Re: [amsat-bb] RE: L1


> Thanks for your interesting comments Stacey....
> I was able to run PSK31 this morning at almost perfect copy on L1 for the
> first time !!!
> My PSK31 copy in the past has been less than 10%.  Did not  make any
> difference
> if I was on L1 or L2.  Even my CW tone sounded good on L1 this morning.
> Nice to see that the "rumble/warble" is gone, at least for now.
> I was concerned that maybe the "rumble/warble" was due to my L-band
IC-1275
> radio.
> BUT, now I can rest easily, knowing that is not the case.
> RTTY is not effected by the "rumble/warble".  Since PSK31 uses some sort
of
> phase shift
> modulation I guess the "rumble/warble", radar, or whatever really messes
it
> up.
> Fantastic perigee pass this morning !!!!!!
> Regards
> Rick
>
> It did not seem to make any difference ----- Original Message -----
> From: "Stacey E. Mills" <w4sm@cstone.net>
> To: "Amsat Bulletin Board" <amsat-bb@AMSAT.Org>
> Sent: Sunday, August 18, 2002 8:54 AM
> Subject: [amsat-bb] RE: L1
>
>
>
> >Hi All,
> >   well rudak is off and L1 is as clean as a whistle again... do the
> > designers
> >or the command team understand  or even have a theory
> >on why rudak being turned on disrupts the L1 signal so badly?
> >
> >thanks
> >Kevin WA6FWF
>
> Kevin,
> I believe it is a coincidence that L1 has gotten better with RUDAK off.
We
> have tested this before.  I also wondered if the two were related, but
> tests earlier showed that they are not.  The L1 "rumble" seems to be due
to
> RADAR interference which as been with us for several weeks and has gotten
> much better in the last few days.  L2 is slightly less sensitive than L1
> and does not seem to suffer from the interference.
>
>
>
> --
>   _______________________________________________________________________
>   Stacey E. Mills, W4SM    WWW:    http://www.cstone.net/~w4sm/ham1.html
>    Charlottesville, VA     PGP key: http://www.cstone.net/~w4sm/key
>   _______________________________________________________________________
>
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