dlj04(at)josephson.com
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 Posted: Tue Feb 24, 2015 1:09 am Post subject: AeroElectric-List Digest: 11 Msgs - 02/23/15 |
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Time: 08:23:42 PM PST US
From: John <jrevens(at)comcast.net>
Subject: Handheld transceiver alternate antenna
Is there an efficient, elegant way to connect an external aircraft comm
antenna to a handheld radio in the event of failure of the panel-mounted
radio that the antenna is connected to? I know that I could run the
cable within reach of the pilot, with connectors inline to break the
connection to the panel and connect to the handheld unit. That's what I
did on my first homebuilt. However, I envision a panel-mounted male BNC
connector that could possibly be used to connect the handheld without
physically disconnecting the failed radio, providing that radio is
switched off. If this is possible, I'm wondering if some kind of antenna
switch or splitter would be necessary.
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Your first answer was better. A splitter is not practical, given the need to maintain low loss for each radio. You would need a switch, and there are good quality coaxial toggle switches. They are expensive and fairly large. There are a few surplus ones on ebay now with N connectors, search 'coaxial toggle switch.' There are cheap ones made for ham/CB/TV but I would not try to use one of those.
I think I would use a separate antenna instead.
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