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Author Topic: Use of coax switch  (Read 1261 times)
N7ORS
Member

Posts: 6




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« on: May 28, 2001, 04:06:20 PM »

The traditional use of a coax switch is to select multiple antennas for one rig position. I have a need to switch multiple rigs using just one antenna. Will the off the shelf coax switches work for this purpose and is there any problem that I am overlooking?
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WB6BYU
Member

Posts: 13580




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« Reply #1 on: May 29, 2001, 09:08:13 PM »

The switches will work fine - they don't care which direction the
RF is flowing!

If the switch connects the unused jacks to ground, then your rigs
may not be happy if you attempt to transmit on it.  But the other
sort of switch will offer an open circuit instead, which isn't any
better (and, in fact, the short circuit may be preferable to protect
the other rig(s) connected to the switch.)

Switches are not perfect.  If you are running a KW through a switch
and have a receiver connected to the unused contact, the RX will
get 1 watt applied to it if the switch has only 30dB isolation.  Some
radios can handle this, others may not.  If you use a good quality
switch and use reasonable power (up to 100 watts, say) then there
should be no problems.
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