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Thanks for adding me to the forum.

I am building a Wifi receive-only 2-way Antenna Switch using an ESP8266 and relays. It's going to switch between an MLA-30 and my existing long-wire.

I have a query regarding the unused antenna feed that is not switched in:

Should this be:
  1. Left floating (not connected to anything)
  2. Connected to the RF ground (shielding of the output coax going to the set)
  3. Connected to electrical ground (-ve power supply to switch/relay).
It's going to be in the loft, so difficult for me to experiment.

Thanks in advance.
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