Kenwood TS680s circuit query

Discussion in 'General Technical Questions and Answers' started by VK5KKS, Nov 20, 2021.

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  1. VK5KKS

    VK5KKS Ham Member QRZ Page

    Hi. The attached circuit shows the antenna input to the Kenwood TS680 transceiver. If you trace the antenna you find it goes nowhere! A signal comes in, passes through the coil (used for SWR sniffing) then onto the bank of relays. The circuit shows the relays in the receive position. So, where does the incoming signal go from there as all relay contacts on the antenna side are not connected. Am I missing something here? TS680S-ANT-CIRCUIT.jpg
  2. KO6WB

    KO6WB Premium Subscriber QRZ Page

    The schematic shows how the relays would be with the unit turned off.
    When you power the rig on then one of the filter secions will be energized.
    It depends on which band the rig powers up on.

    Hope this helps

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