Seems to me that 40 years ago when I had a National NC-300 receiver, its
meter was calibrated 6db per S-unit.  However, if I recall correctly,
nominally, an S-unit was supposed to be 3db.

Mike Freeman < K 7 U I J >


----- Original Message -----
From: "Marty Montgomery" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, August 29, 2003 4:42 PM


> As I understand it and was taught by some elmer types around 91-93 or
so
> maybe later that it's not 3db but 6 db that equals one S unit. so
therefore
> s9=54 db and s9+60= 114 db and if the S units were kept, it'd be equal
to an
> s19.  If someone else can prove the 3db=1 s unit theory then feel
free.
> ----- Original Message -----
> From: "K5IN" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, August 29, 2003 6:38 PM
>
>
> > This also not been mentioned that a "s unit" = 3db of signal.
> > ----- Original Message -----
> > From: "Michael Ryan" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Friday, August 29, 2003 7:05 AM
> >
> >
> > > Hi all:
> > >
> > > Is there a rule of thumb that can be used?
> > > IE:  you have a perfectly resonant antenna with 100W out.  What
power is
> > > needed to get an improvement on the signal strength?  Will 200W
make
> much
> > > difference or to receive an actual increase in signal strength, a
power
> > > gain of lets say, 500W is required? Will a power output of 800/KW
give
> > much
> > > improvements to a 500W signal strength?  Also, If you have an amp
rated
> at
> > > 400W continuous or digital mode,  what would the PEP SSB rating
be?
> > >
> > > Thanks to all & 73:
> > > Michael VO1RYN
>
>
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