I SAW 2 MODS LISTED FOR THE ICOM 728/729 XCEIVERS IN OAK.OAKLAND.EDU\ PUB\HAMRADIO\MODS\ICOM.THE MODS STATED THAT D8 ON THE PLL CIRCUIT BOARD SHOULD BE REMOVED. NEITHER MOD STATED THE EFFECT OF REMOVING THE DIODE SO I BECAME SUSPICIOUS AND CHECKED IT OUT. D8 IS PART OF A VOLTAGE DOUBLER USED WITH A CHARGE PUMP CIRCUIT TO GENERATE (NEGATIVE)8VDC. I CAN SEE NO BENIFIT FROM REMOVING THIS DEVICE AS STATED IN THE MODS AND WOULD WELCOME AN EXPLANATION FROM THE ORIGIONATOR OR OTHER. PLEASE POST THIS WITH THE REST OF THE ICOM MODS.