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TOPIC: Antenna switching

Antenna switching 18 Mar 2022 18:07 #16

  • W3FRG
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I also have concern and posted previously this question regarding Receiver Input Protection.
The block diagram you reference shows that the unused ports of the relays open, not grounded.
I think a true schematic, or PCB layout, would be better suited to resolve this question.

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Antenna switching 26 Jan 2023 12:52 #17

  • Rome
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Hello Tom.
You are correct, it's not a complete schematic, there are also 3 additional relays which:
1. Ground each antenna port when TRX is switched off
2. Ground VHF port when you operate on HF
3. Ground HF ports when you operate on VHF
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