I would agree, as I too had a reverse polarity issue.? For me it was a left over HP power brick; HP has for some reason reverse polarity on the barrel connectors.? I forgot this and plugged it in.? Never got to turn on the rig, as the power supply crow bar shut down the power supply.? Would have fried the rig if I had not wired up the diode as listed in the wiring directions.? The only thing I would add is make sure you have a fuse in line upstream of the diode.? This is really critical if your supply can provide more than 3 amps, and does not have a crow bar shutdown circuit.
73
Evan
AC9TU
