Barry,
Two DPDT relays for each antenna - one for each rig. Activating a
relay by Rig A with one set of contacts disables the other rig from
being able to activate the same relay for the same antenna and vica
versa. If you are also wanting to prevent the other rig from
transmitting at all that is another box to build. Let me know if this
is enough info. If not I'll draw it.
Stan, K5GO
Sent from Stan's IPhone
On Mar 1, 2010, at 1:40 PM, "Barry Fox" <foxbw@comcast.net> wrote:
> I have two HF radios and 4 different HF antennas. I would like to use
> each rig on any antenna, while obviously locking out that antenna for
> the other rig. The commercial products 6-Pack, 8-Pack, etc are way
> over my budget. Anyone have a schematic for a "4-Pack" or similar
> device they would like to share? Obviously relays are the way to
> go, and I can get the RF relay switching part of it on paper but
> not the lockout logic. Some sort of electro-mechanical exclusive-OR
> gate array / diode matrix? Anyone been there and done that?
> TNX / 73,
> Barry - W1HFN
>
>
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