If it does not give more than 25W and it is 50W or the PA of the equipment is wrong or you are taking it out of the range that the manufacturer specifically guarantees such power (146MHZ to 174 in that model). On the other hand, not even with instruments on the receiver side, you will notice any difference between a 25W or 30W radio equipment. The power is a function that is not linear and to be noticed or measured in the receiver must be increased logarithmically. Because of that, amplifiers are generally a factor of 10. Greetings. Ric.