Michael,

I can't answer the last question, but recall that doubling of power is a 3DB
gain, if I remember my theory correctly.  An S-unit is about 6DB.  So,
doubling of power isn't that significant.  But, obviously, an increase from
100 to 500 watts is about a 7DB gain, if I recall my tables correctly.

Steve
K8sp


----- Original Message -----
From: "Michael Ryan" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, August 29, 2003 10:05 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