Spreading those coils force that filter circuit to become useless. It is there to filter off the harmonics of 54mhz. You don't want 54mhz coming out of your radio. The watt test meter may see more watts output if those coils are spread; but those watts aren't on 27mhz. Those watts are on 54mhz. Meters cannot tell the difference between the two frequencies. It also robs the output transistors of what 27mhz it could be transmitting.
It is a useless idea proposed by those who don't really know what they are really doing. Or it is done by those that do know, but will do the job because they want more money when working on the radio. They don't care that it is worse; they do it because people will pay for what they think is better.
Clipping the diode out will make the radio put out more watts too. But those watts will be spreading next to whatever freq/channel you are on. That is called 'bleed over'. This happens when the modulation circuit is disabled and the modulation can now go waaay above 100% modulation. SO it splatters across across the 27mhz band. The same thing is true for the output final transistor output here too. It could be putting all of the energy into the frequency you want; but now it has to spread it around and - in effect - makes the radio output worse/less on that channel. This condition will also put extra stress on the output transistors and can contribute to premature failure. Remember? Meters cannot tell the difference. So, you might see more watts out; but they aren't going where you think they are.
Hook up a radio that is so 'modified' up to a linear amp, and the problem is made much worse - because the amp is now having to amplify a bunch of different frequencies instead of one. SO, more power is now wasted in the amp - for the same reasons mentioned. Crap in; crap out. This is true for both the spread coils AND the diode clip job. Still want that?
Ham radios don't splatter and their output transistors and put all of the power output directly on the freq that it is on. Efficient and clean. One of many reasons why they are better - and sound better - than a CB. But if you need to sound like the rest of those who don't know any better and want to continue to perpetuate the splatter/over-modulation myth further - go right ahead and keep it the way that it is now.
The BEST way to make the radio perform with a mod, is to put a 'TopGun Compressor' in it and keep the modulation adjusted at 100% or less. That, and an alignment that is done BY THE BOOK - should make it modulate better than those that are still caught up in the old mythical and misguided means for better modulation. This mod works very nice on AM and SSB too. Or get an older Turner Super SideKick, Turner+3, or Turner+3B mic - they already have a compressor built in for the same compression effect.
Another way is the NPC mod. But this has to be done by a tech that can carefully set the modulation so that it works just right. Not to be re-adjusted by someone that doesn't know what they are doing; or the best effect is lost. This mod is for AM use only.
Adjusting the mic gain too high will also make it have many of the same maladies mentioned above - too. 100% modulation or less is a fair 'rule of thumb' . . .
