Kenwood TS-940s Receive Problemsīased on which production run the radio is from may determine what problems you will have. Kenwood specifies transmit duty cycle time, The TSS is guaranteed to operate at full power output for periods exceeding one hour 1 CW, HO watts. Pushing the state of the art in HF transceiver design and construction, no one has been able to match the TSS in performance, value and reliability. TSS-the standard of performance by which all other transceivers are judged. At the time Kenwood considered it their top of the line competition class HF radio until it was later surpassed by their newer model TSDX.