I am seeking a SB-220 linear amplifier. I would like to swap my Kenwood TS-830S Kenwood transceiver set, gold label series, with matching MC-50 desk microphone, SP-230 outboard speaker, and outboard VFO 230 included. The whole set works great and looks very good cosmetically. I would like an SB-220 in good and working order in return. I live in the Chicago metropolitan area. 73's Ron K9KLT