If you did manage to squeeze a bit more out of these units, it would be at most a watt or two. You'd have to double the power (3db) to even notice barely 1 s unit if properly calibrated on the other side. Chances are the modulator wouln't be able to fully modulate the carrier if it were more then that anyways. If you want more power get a linear. Most CB linears have no filtering to speak of and class C biased. Put crap in and you get a hell of lot more crap out, especially if overdriven. Best to drive it clean at spec output and put a good band pass or high cut filter after the amp. This radio has a limiter built in, cranking up the mod is useless and only induces compression with a power mic and flat topping the audio. Disabling the limiter may give you results on a mod meter you pay some idiot to mod, but the audio is going to be horrible. You also can bet you pa or modulation IC or transistor pair are going to fail driven to their limits in short order. This isn't a recent radio. Many CB chips and transistors are unavailable now with some subsititutions possible for the transmitter, but little for the modulator unless you buy a junker for parts. Assuming somebody really knows what they're doing and has the equipment to repair it, the price tag will match. A bench hour will probably be what you paid for the radio without parts with competent component level repair.