Hey John, thanks for participating.
My attempt #1 requires (2) 9V batteries and is more like a proof-of-concept.
I read through the "battery powering" thread and I figuring if you can get the SC-1 working on battery power then why not use say a 15v DC table top or wall wart
That's exactly what I'm doing. See this thread... http://fivefishstudios.com/forum/viewtopic.php?t=164http://fivefishstudios.com/forum/viewtopic.php?t=165
This is my DCC-1848 psu. This is attempt #2 that will be powered by a single battery or wall wart AC/DC.
For simplicity and some cost savings I was looking at 48v DC desktop power supplies this will proved a full 48V for the phantom power and you can use a simple 2 resistor center ground voltage divider for + - 24v or a 1/3 divider for + - 16v to supply the SC-1 and eliminate the regulator circuit all together.
I tried the voltage divider trick to get a virtual GND to power the SC-1 and it didn't work.
For one, the 48V phantom power's GND will be different from the split/voltage divider's ground. There's probably some way to do it but would probably involve some modifications on the PCB/circuit. I just didn't pursue it, and instead went to working on the DCC-1848 PSU design.
have a look at the LM2577 adjustable DC -DC booster
You're on the right track. But they have other parts than the 2577 that have higher switching frequencies. That's what I'm using for my 48V section.