Don't ruin a good radio. Do like the man said and put the external "antenna Extender" after the radio.
For less money you could get the same or more watts with a KL-203 amplifier. They run about 64 dollars. The RFX-175 is about 125 bucks plus install fees.
You know, that little spacer thingy that goes in between the coax and the antenna that makes the antenna longer.
(Some of them even hook up to 12VDC to keep the antenna warm in Winter so it won't ice over)
175 WATT POWER CABINET BY MAGNUM-H&Y Electronics
They are neat but must go in a full size radio and are alittle expensive.
Calling them "power cabinets" now are they? LOL The FCC will never catch on to that
The FCC would need an assist from the Ebay Police.