My answer would be "it depends".? Are you intending to use it in a similar fashion as the original Yaseu supplied wall wart charger for short recharging cycles?? If so, then that's probably ok to do so, does it have a similar current capacity to the NC-88B (200 mA)?? Remember that the FT-60 doesn't incorporate any sort of internal smart charging circuit as do some other radios.
If I wanted to power the radio for operation, I would step back the voltage to 7.5 or 8 Volts, assuming your device could do that.? I have one of the 12 v battery replacement devices that provides an indicated 8.0 volts to the radio and seems to run mine day in and day out at the office w/o problems.
MW / N4MEW
