Quote:
Originally Posted by acropolite
High power supply ratings are probably less important than the size of the cable feeding the power. Ohms law is very unforgiving at low voltages and high currents, fractions of an ohm of resistance in your leads equate to serious voltage drops with any significant current. A current draw of 12 amps with 0.1 ohm of resistance in your feed cable (and associated connectors) equates to 1.2 volts drop, .2 ohm and your down by 2.4 volts.
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That may have been my problem Phil. I have a dc distribution box and am using rca connectors for the 12v. The mount may have been plugged into a bad socket, the box is several years old now. I notice the manual quotes voltages for when the red light flashes and a computer psu supplies 12v not 13.5v like a power adapter.