[Antennas] Relay Box

Mon, 15 Dec 2003 18:01:20 +0000

   Two relays are required to switch between three antennas, therefore
four relays will switch two radios between the same three antennas,
as long as the same ONE rotary switch (with diode logic) is used to
select the ten possible arraignments.
   You should be able to figure it out.
(hint:  with radio # one on each of the three antenna, radio #2
only has two antennas to choose from)
(extra hint: If power fails to the relay system, you want the two
radios to be on different antennas)

> I try build relay box to switch 3 antennas to two radios in such a way that
> any antenna can be switched to any one od two radios.
> It is mind bogling and I seems to go nowhere with minimum number (five
> relays) of relays.
> Any one has schematic?
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