mylesgm
Well-known member
hey chaps, I have a small gates preamp from a 70s solid statesmen broadcast console that I would like to put into a 51x module. It physically fits fine with room to spare and runs on 30v (see schematic). So I'm looking for a little advice. I can add the jlm go-between board for pad and phantom easily enough and a jlm Regurgitator or similar opamp based balanced out (the jlm is my preference because it also allows a trim of +/- 18db) but I'm wondering how to power it. the schematic has it running at +30vdc and I'm wondering whether I should use the +24vdc rail of the 51x or use the -16v rail as ground and the +16v rail as positive to give a 32vdc which should be within spec. The regurgitator will run off +/-16v no problem. I'll recap of course and could use a resistor to drop the voltage to 30v but is it worth it for the extra 6v over the +24v rail? Any other problems you can see with racking it? I was also thinking of putting a switch in to alter the input impedance because the transformer has that possibility and possibly adding a transformer on the output... Thanks!