Neighbor ham has an ALS600 RF deck and the power supply was lost. I am pretty sure these use +50VDC and +13.8VDC. I've peeked at a schematic and it shows -13.8VDC too, but I couldn't figure out what that does other than drive the power supply volt meter ? Anyway, I'm suggesting we try to get a cheap blade server 50V / 30A power supply plus a cheap 13.8V switcher, throw them both in a small metal box, and have a really nice and light weight 500W-class amp for portable use. Thoughts on a (cheap and easy) replacement power supply ?