[BULK] - Re: [BULK] - Re: [BULK] - RE: [SixClub] Dead Band Qu iz

Wed, 11 Feb 2004 14:44:57 -0800

FM has about a 20db S/N disadvantage compared with CW.  A CW signal, or
better still, a JT44 or WSJT signal, can be copied right at the noise level,
and using digital decoding (if it works!), even below the noise level.  FM
can't.  Although I've never even attempted to hear an FM signal off the moon
(very well equipped stations might be able to), since phase modulation and
frequency modulation are detected in the same way and the lunar reflection
is full of phase variations by nature, I don't even know if it's possible to
discriminate an FM signal reflected by the moon's surface.  Again, never
tried this.  Anyone know?  If it were possible, then if you could make a CW
EME contact with 100 W output to any given antenna system, it would take
several kilowatts output to the same antenna system to achieve similar
results using FM.  -WB2WIK/6

"Success is the ability to go from failure to failure with no loss of
enthusiasm." -Winston Churchill

> -----Original Message-----
> From:	[email protected] [SMTP:[email protected]]
> Sent:	Wednesday, February 11, 2004 2:42 PM
> To:	[email protected]
> Subject:	[BULK] - Re: [BULK] - Re: [BULK] - RE: [SixClub] Dead Band
> Quiz
> 
> Steve, thanks. At the risk of laboring the point, why CW or SSB and not,
> say
> FM (well I did preface this thread with the "dumb" bit - LOL)
> 
> 
> ----- Original Message ----- 
> From: "Steve Katz" <[email protected]>
> To: <[email protected]>
> Sent: Wednesday, February 11, 2004 5:12 PM
> Subject: RE: [BULK] - Re: [BULK] - RE: [SixClub] Dead Band Quiz
> 
> 
> > Mostly CW; SSB for truly well-equipped stations!  Modes requiring great
> > frequency or phase stability for computer decoding don't work well when
> the
> > signal points of origin and reflection are constantly in motion, as the
> > earth and moon are.  -WB2WIK/6
> >
> > "Success is the ability to go from failure to failure with no loss of
> > enthusiasm." -Winston Churchill
> >
> > > -----Original Message-----
> > > From: [email protected] [SMTP:[email protected]]
> > > Sent: Wednesday, February 11, 2004 2:29 PM
> > > To: [email protected]
> > > Subject: [BULK] - Re: [BULK] - RE: [SixClub] Dead Band Quiz
> > >
> > > Dumb question time but as far as EME is concerned, is this always
> voice
> or
> > > always CW or both? And I realise that its not just 6m. Thanks in
> advance.
> > >
> > >
> > > ----- Original Message ----- 
> > > From: "Steve Katz" <[email protected]>
> > > To: <[email protected]>
> > > Sent: Wednesday, February 11, 2004 4:15 PM
> > > Subject: RE: [BULK] - RE: [SixClub] Dead Band Quiz
> > >
> > >
> > > > To the moon and back averages about half a million miles, so that
> wins.
> > > > -WB2WIK/6
> > > >
> > > > "Success is the ability to go from failure to failure with no loss
> of
> > > > enthusiasm." -Winston Churchill
> > > >
> > > > > -----Original Message-----
> > > > > From: Randy Tipton [SMTP:[email protected]]
> > > > > Sent: Wednesday, February 11, 2004 1:27 PM
> > > > > To: [email protected]
> > > > > Subject: [BULK] - RE: [SixClub] Dead Band Quiz
> > > > >
> > > > > To the moon & back ... however far that might be
> > > > >
> > > > > Maybe a six meter EME station can tell us...
> > > > >
> > > > > Tip
> > > > >
> > > > > > -----Original Message-----
> > > > > > From: [email protected]
> > > > > [mailto:[email protected]]
> > > > > > On Behalf Of [email protected]
> > > > > > Sent: Wednesday, February 11, 2004 2:55 PM
> > > > > > To: [email protected]
> > > > > > Subject: [SixClub] Dead Band Quiz
> > > > > >
> > > > > > What is the record distance for 6 meters?
> > > > > >
> > > > > > hope somebody knows!
> > > > > >
> > > > > > Jerry W9FS
> > > > > > ______________________________________________________________
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> > > > >
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> > >
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> 
> 
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