You should indeed grab that Astron. I only trust my rigs on Astrons. It is foolish to put a several Hundred dollar radio on a junk power supply. With that Micronta, your greatest danger is popping the pass transistor which would put the raw DC Voltage on the radio OVER VOLTAGING it. Radios can survive Reverse polarity most of the time due to protection diodes. But overvoltage will COOK the internal circuitry, even a low current overvoltage.
I woudn't hook up that very nice FT-350 to anything but a good quality bulletproof Astron (which has Overvoltage Protection built in) and Current limiting.