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The Kenwood TS-940S/AT was manufactured at and after 1986. At the time Kenwood considered it their top of the line competition class HF radio until it was later surpassed by their newer model TS950DX. The Kenwood TS-940S is the same as the TS-940SAT except without the automatic antenna tuner. The "AT" after the S is for Antenna Tuner.