I believe that Elecraft used to sell a Y cable for connecting from the accessory socket on the K3 to both the KPA1500 and a RemoteRig radio side box. I no longer see this on the Elecraft site. Anybody have a source for these? Tnx. 73 de Brian/W3BW -- *Brian F. Wruble, C.F.A. The Conch Republic "We seceded where others failed."