nuckolls.bob(at)cox.net
Guest
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 Posted: Tue Apr 29, 2008 11:56 am Post subject: Hand-held antenna adapter |
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At 08:14 AM 4/29/2008 -0700, you wrote:
| Quote: | Below is the result of your inquiry. It was submitted by
Hank Eilts (eilts(at)ti.com) on Tuesday, April 29, 2008 at 08:14:03
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Tuesday, April 29, 2008
Comments/Questions: Hello Bob,
I believe that I saw an article on your website describing how to wire a
jack into the panel for connecting a handheld comm to the external
aircraft antenna. I believe you advocated a 1/4 phone jack with a
switching function on the jack for the panel. However, now I cannot find
the article and I wonder if you may have pulled the article due to
operational problems with the technique.
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Yes, the quality of close-circuit phone jacks available to
the task was pretty poor. Failure of the jack's switch
would disable the panel-mounted radio. Here's a photo
of the DIY project:
http://www.aeroelectric.com/Pictures/Antenna/CommTap-Jack.jpg
ICOM offers a hand-held adapter with the same technology
http://www.aeroelectric.com/Pictures/Antenna/ICOM_Hand_Held_Adapter_1.jpg
http://www.aeroelectric.com/Pictures/Antenna/ICOM_Hand_Held_Adapter_2.jpg
| Quote: | I work in electronics and can wire up the panel mod without problems, but
I'm wondering if normal panel vibration can make/break the switch when a
handheld in not installed, causing problems for the main radio.
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Given the lead lengths for the commercial off the shelf
device from ICOM, you probably couldn't do much worse!
How about CK7000 series switch with a bnc chassis
mount connector mounted right next to each other.
http://www.aeroelectric.com/Pictures/Switches/7301P3YZQE.jpg
Bring ship's antenna and transmitter coaxes up to
the back and assemble with shortest practical leads
to toggle antenna between hand-held and panel-mounted
transceivers.
In fact, I've been considering a product consisting
of a 2 pole switch that terminates the panel-mounted
radio into a dummy load when the hand-held is being
serviced by the antenna.
However you decide to go, I don't recommend the 1/8"
closed circuit jack.
Bob . . .
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( IF one wishes to be "world class" at )
( anything, what ever you do must be )
( exercised EVERY day . . . )
( R. L. Nuckolls III )
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