Anyone have any information on a EMA-220X mixer that were packed with a 1990 era KK7B transverter instead of SBL-1Xs?? They are marked different and I am not sure if they are intechangeable. I have a "pinout" on the SBL-1X but I can find no pinout on the EMA-220X. Maybe the best bet would be finding a couple of SBL-1Xs! Bill K0AWU EN37ed