Got one of those thirsty 172 watt TECs and need a 24 volt power supply? The Astron LS18A is rated at 28 volts and 12 amps. I just got off the phone with Astron, when throttled back to 24 volts it will still provide the 11.3 amps the pelt needs. You can check it out here http://www.astroncorp.com/w28.shtml . Ham Radio Outlet is the only dealer I know of that carries it. It’s a hefty $189! HRO’s Web Site is http://www.hamradio.com/ .