The simplest way to protect your Icom 9700 from local HF transmitters and lightning is to put quarter wave length stubs directly on the rear connector for each band. This does not compromise the receiver sensitivity or reduce the transmitter operation at all, except if the DC feed to a preamp is required, in which case a BPF in the remote preamp may be a better solution.
Andrew VK3OE/VK3OER
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