[Antennas] Radio switch

Fri Oct 29 12:26:45 EDT 2004

This always sounds good in theory, and it seems like all the popular present
day and even the old timers made it sound like we could do this with no harm
to either set, but in real world operation, the isolation factors are just
not there , so you can leave on the other rig , with out experiencing front
end damage..even changing band on the unused rig, still does little to
protect the front end, as Chris mentioned, the safe way is to ground the
unused set's RF line input, but the best is have it completely removed, but
that kills off what we are really wanting to achieve.. so your back to
grounding as the next best thing..
Earlier today Claus asked about spec's for a TRANSCO electric switch, and
goodness knows they made plenty of them, all very well built, but none I
have found still will provide enough isolation, your thinking is if the
switch is good for 1 or more KW of power handling ability that it would
surly provide enough isolation for say a 100 watt or so exciter.. nope, you
put emm all at risk, unless you add another relay that takes the unused sets
RF to ground.. but then you have a desk full of switching matrix. good
luck.. mac/mc
Located 46 miles due North of the Alamo, and 121 miles due South of the
Western White House. see my website at www.collinsandharrisradios.com
----- Original Message ----- 
From: "Chris Boone" <CBoone at earthlink.net>
To: "'KØCQW'" <johne at tds.net>; <Antennas at mailman.qth.net>
Sent: Friday, October 29, 2004 9:57 AM
Subject: RE: [Antennas] Radio switch
If the antenna switch provides enough isolation, it wont...the Dowkey
SHOULD work ok...
No different than the sep TX RX units of the past with an external
antenna switch...if the relay can, it would help to make sure the UNUSED
side of the relay is grounded out or shorts to gnd...that way, the
inactive radio input does not overload.
Chris
WB5ITT
> -----Original Message-----
> From: antennas-bounces at mailman.qth.net
> [mailto:antennas-bounces at mailman.qth.net] On Behalf Of KØCQW
> Sent: Thursday, October 28, 2004 4:17 PM
> To: Antennas at mailman.qth.net
> Subject: [Antennas] Radio switch
>>> Looking for input on this one, I plan to have two
> transceivers connected
> to one antenna system with a 12volt
> Dowkey relay.
>> If both *transceivers where on and on the same band and one was
> transmitted with would it damage the other **transceiver?
>> Any other way of doing this?
>
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