I would think you will want the contacts to be configured to "break before
make" to avoid the possibility of equipment damage at transfer time. Relays
can be purchased or reliably configured as such, switches would be more
risky. Thinking back to my novice days, a plain old knife switch might be
enough to satisfy. Operating frequency and impedance issues need to be
considered if the application is above the HF range.
Dave Aukamp, K4QT
At 10:49 AM 11/26/2002, you wrote:
>Message: 11
To: <towertalk@contesting.com>
>Date: Mon, 25 Nov 2002 21:21:57 -0500
>To: towertalk@contesting.com
>From: Pete Smith <n4zr@contesting.com>
>Subject: [Towertalk] transfer switch
>
>Thanks for all the many replies -- really too many to acknowledge all
>individually. Simplest solution suggested was DPDT switches or relays with
>the non-moving contacts cross-connected "X" fashion, such that when
>activated rigs are connected to the opposite antenna feeder, and when not
>activated connections are normal. I have some residual question about
>cross-radio isolation in such an arrangement -- maybe physically
>separating two SPDT relays would do the same thing with more isolation.
>
>73, Pete N4ZR
>Sometimes a tower is just a tower
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