For sale: the KSB2 ssb adapter which I built for my K2. I used it exactly once, to make sure that it worked (it did). If you have a K2 without SSB, you will also need the few small parts that go on the front panel board, the two three-pin headers that go on the RF board, etc. 50 bucks postpaid. 73, Vic, K2VCO Fresno CA