throbscottle
Well-Known Member
Just found out my multimeter is a bit knackered. Real voltages are 35.7-0-35.7 and 12.8, so the smoothed DC is +/- 49v The amp's smoothing caps are 6800uF at 50v - cutting it a bit fine there! Since the amp says 120W on the back of it, I think this must be peak power. Going by the transformers core dimensions - centre leg is 41.7mm x 23.6mm, looks like it's under 100VA. I was under the mistaken impression that the VA of the transformer would be higher than the amp's power, but apparently not.
So going with the buck pre-regulator idea, with the voltage being dropped there should be more current available. The regulator's efficiency looks like 77% for the + rail and something less than 96% for the - rail. Errm, can anyone help me work out how much current I can get, supposing I have a max voltage of 35v? I'm hoping it'll do a couple of amps.
So going with the buck pre-regulator idea, with the voltage being dropped there should be more current available. The regulator's efficiency looks like 77% for the + rail and something less than 96% for the - rail. Errm, can anyone help me work out how much current I can get, supposing I have a max voltage of 35v? I'm hoping it'll do a couple of amps.