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Consider the Workman model CX-3 as an example of an antenna selector switch which is barely suitable for its intended purpose. With an HF isolation of 42Consider the Workman model CX-3 as an example of an antenna selector switch which is barely suitable for its intended purpose. With a poor HF isolation of 42dB this selector switch is not very efficient at its intended purpose. It does not ground the unused connectors so if you planned to use it to connect multiple transceivers to a single antenna you risk damaging those transceivers because power from the selected transceiver is going to bleed into the unused transceivers at a level which could do damage. This would not be a problem at QRP power levels, however, at 100 watts it would be a bad idea.