I am using a Pyramid PS-26KX to run my mobiles with the RFX-75's and 2290 mod. Order one through Copper Electronics and arrived damaged. UPS picked it up on a damage claim and the second one arrived in perfect shape. Has some nice features and have had good luck with it. The fan is fairly quiet. With variable voltage it is good not to rely totally on an analog meter. Get a digital volt meter for final voltage setting. Here are some good close ups, Bulldog.