Sean, Its quite refreshing to the CEO being so supportive and open with those seeking to modify his product.
So you've gots to get an external powersupply that provides regulated 5vDC and 14vDC. (or that 14vDC could be changed to a charger for a 12v SLA, assuming the dropout voltage of the 2 linear regulators it would feed [to the analog circuitry] allows it. You've got to cut a trace to route your 14vDC in, and void the SB warranty.... So you need a multibobbin power transformer, not a toroid, bridge(s) [and doubler depending on transformers secondary], ic or discrete regulators and caps.... As you're using a proper transformer with low capacitve leakage and limited bandwidth, you might as well front that with a single small balancing transformer and appropriate capacitive filtering between, and drop the noise going in, and out. Obviously this hack isn't going to come with UL certification so you need a grounded mains plug, and inevitably we've line noise and grounding issues. I'm a great believer in brute force filtering and symmetrical power for both analog and digital circuitry, as long as you can source inexpensively enough. Which is the sole advantage of the diy community. We can buy surplus crap. Suggestions? What are the 3 pin linear regulators feeding the DAC and opamps? Is the output NJM2041m running single rail with the output electrolytics biased @ +4.5vDC? Many thanks in advance, Paul -- occam _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
