malfunction. When the amplifier gets repaired, it’s recommended to replace the relays also; that’s because the contacts will be damaged more or less, depending on how much current and how long the arcing occurred. This is still cheaper than a pair of special relays. For AC inductive loads (cosq = 0.4), the contacts of the G2R high capacity relay used in this design are rated for 16A and 180V. For DC resistive loads, the contacts are rated at 16A and 30V. For DC inductive loads, refer to the graphics under Engineering Data in the G2R relay datasheet. As it is, this circuit works well for my 40W power amplifier. It will probably work for amplifiers with up to 100W of power. For amplifiers with more power, different relays will have to be selected. As I said before, this is important, and it will save your expensive speakers if the correct relay is chosen. NV ■ FIGURE 5. Schematic of the circuit with AC detection.
es: 1 million points of Featur d ecor , r , FFT y deep memor nate trigger mode, and oll mode, alter , r eplay and r adjustable trigger sensitivity USB version with Stamp and USB Cable.
ariable Output, 0-30VDC, V 0-3Amp.
w T Outputs plus 5V 3A fixed.