As many more have said: NO!? The real difference between 3w and 5w is virtually indiscernible.? FAR MORE depends on your antenna, the propagation characteristics of any particular day, and the receiver's ears.
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Let this sink in:? 3.6w on 10m using a TW2010 antenna.
The Villages, FL to KL7AC in North Pole, AK, about 3712 miles (1,030 miles/watt)
more at:
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72 de N4REE, Bob Easton - QRP CW forever
N4REE - Bob
