While shack cleaning, I've com across a pair of NOS Toshiba TA7201P audio amp chips for the TS-820(S) and R-820. These chips are no longer available & must be replaced with a kit of several parts. My only Kenwood rig is a TS-850S, so I have no use for these. Best offer for the pair gets 'em, free shipping to the lower 48. 73 de bob, n2oam