Amplifier works great and is currently set up for 110 volts. The amplifier was checked by Ameritron prior to my purchase. The 3-500Z has very low hours, almost all of which is standby. The amp has not been abused or run into a high SWR and not used on digital modes. The amplifier has soft start and QSK built in. 35 watts drive provides over 500 watts out, 50 watts provides over 700. The amplifier is very clean and has never been around cigarette smoke. I have the original boxes and manual. Prefer not to ship but that is negotiable. $800 buys this great little amplifier. Reasonable offers will be entertained. If not sold before, it will be available at the Hamvention.