Hello everyone. I just got a new (old?) Kenwood TS 520s. I have used for years my old Drake "Twins" (R4A and TX-4) with a neat Shure 550L desk Mic. I want to use this mic with my 520s. Because I do NOT want to get rid of my Drakes, I want to be able to use the mic with both rigs. There is a compatibility problem with the inputs to the rigs. Drakes use a Switchcraft S230 plug, the 520s use the 4 pin plug. I am thinking about making a "relay box" so I can plug in the Shure to the box, and come out with a 4 pin plug to the 520s. This way, I think, I can use the mic/relay box for the Kenwood and not have to cut off and replace the plug, and just use the mic for the Drakes the way I always have. Does this sound like it will work? Vis a vis the output to the Kenwood rig, can I use the chassis ground and the mic ground together? (one ground to 3 and 4 pin) Please refer to picture for clarification.