Howdy, long time browser, first time poster.
I'm looking into getting the PCBs for the SSL 9k pre, but looking at the schematic brought up a few questions that I'll need the answers to before I feel confident enough to get started. I apologize if this question has been asked before, I searched but I couldn't find anything relating to my questions. First I should explain that I am experienced using a soldering iron and repairing/modifying equipment. I've designed a fuzz pedal, built a handful of pedal clones and modded a few of my mics, so I am not totally ignorant, but there are still some things that are over my head.
Firstly, and primarily, the schematic in a couple places calls for +/- 15v most obviously at IC31a but there are one or two other places. The power supply provides only +/- 18v, 0v and 48v, so where am I to get the +/- 15v for these spots on the PCB/schematic?
Secondly, and this is a simple one, I just need to confirm how to wire phantom power. I should be applying the 48v to pins 2 and three of the input jack with a resistor on each pin and a DC blocking capacitor, yes? Suggested values for the resistors and caps? I can probably find this information elsewhere online so I'm not too worried about an answer to my question here.
Thirdly, the parts list calls for a bridge. I have no idea what this is. Someone please explain?
Lastly, I'm not sure where to get a 20-0-20v toroidal transformer, does anyone have any idea where one could be found?
Thanks for reading. Again, I apologize if this has already been covered, I searched but it's possible I didn't explore deep enough.
I'm looking into getting the PCBs for the SSL 9k pre, but looking at the schematic brought up a few questions that I'll need the answers to before I feel confident enough to get started. I apologize if this question has been asked before, I searched but I couldn't find anything relating to my questions. First I should explain that I am experienced using a soldering iron and repairing/modifying equipment. I've designed a fuzz pedal, built a handful of pedal clones and modded a few of my mics, so I am not totally ignorant, but there are still some things that are over my head.
Firstly, and primarily, the schematic in a couple places calls for +/- 15v most obviously at IC31a but there are one or two other places. The power supply provides only +/- 18v, 0v and 48v, so where am I to get the +/- 15v for these spots on the PCB/schematic?
Secondly, and this is a simple one, I just need to confirm how to wire phantom power. I should be applying the 48v to pins 2 and three of the input jack with a resistor on each pin and a DC blocking capacitor, yes? Suggested values for the resistors and caps? I can probably find this information elsewhere online so I'm not too worried about an answer to my question here.
Thirdly, the parts list calls for a bridge. I have no idea what this is. Someone please explain?
Lastly, I'm not sure where to get a 20-0-20v toroidal transformer, does anyone have any idea where one could be found?
Thanks for reading. Again, I apologize if this has already been covered, I searched but it's possible I didn't explore deep enough.
