I am powering up a Spectral DMA 50 after several years down time and need a variac to reform the caps . The amp will deliver 120 watts into 4 ohms. How many amperes does the capacity of the variac need to be?
Getting a variac just for that seems a bit extreme... why not power up using a bulb for mains current limiting, say 100 watt rating if you are worried. That will limit any current surge and allow the caps to reform although as toprepairman says I don't think they will need it either.
The official current draw is around 125 watts quiescent so around 0.5 amps.
The official current draw is around 125 watts quiescent so around 0.5 amps.
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