Icarus EXTenna Switch EXTSW-1 Manual

Icarus TV antenne EXTenna Switch EXTSW-1

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EXTenna Switch Installation Manual
Icarus Instruments, Inc.
QRmounts.com
Purpose
The EXTenna Switch allows any handheld aviation radio to quickly access an existing external
comm antenna to ensure good range and readability when this radio is needed to continue ATC
communications. !
For example, an electrical failure in the aircraft will render the existing radio(s) useless. Any
handheld radio can then be used with an existing comm antenna by plugging the supplied RF
cable from the radio into the panel mounted EXTenna Switch. This action disconnects the
comm radio from the antenna and gives the handheld radio access to the same antenna.!
The EXTenna Switch goes in series between an existing comm radio and its antenna. A short
BNC jumper connects the radio’s antenna connector to the Extenna Switch. Then the comm
antenna’s BNC is plugged into the the EXTenna Switch. Note: An extension cable may be
needed to attach the comm antenna to the EXTenna Switch depending upon where it is
mounted. The EXTenna Switch is completely passive and requires no power.!
There are two models of the EXTenna Switch. The model is mounted to the existing EXTSW-1
instrument panel using two supplied 6-32 screws. The 3.5mm jack on the Extenna Switch
extends through the panel, allowing the supplied cable to be plugged in when needed. A CNC
machined drill template with the exact outline of the EXTSW-1 is used to accurately drill the
three required holes. This template is included with the EXTSW-1 along with an adhesive label
that identifies the purpose of the EXTenna Switch.!
The other model is called the . This model includes an adapter plate that allows the EXTSW-2
switch to be mounted in an existing 2.25’ instrument cutout or a 3.125” cutout using a
standard adapter plate. No new holes need to be drilled when using this model and the plate
with its label comes already attached to the switch; no assembly is required.!
What is needed for the installation!
1. An EXTSW-1 or EXTSW-2 !
2. A BNC jumper cable between the com radio’s antenna jack and the switch!
3. An extension cable for the comm antenna cable may be needed to reach the switch!
4. The EXTSW-1 model requires three drill bits: a 1/8” pilot hole drill, a 5/32” drill for the two
6-32 screws, and a 9/32” drill for the 3.5mm jack!
How to Install the model EXTSW-1
The body of the EXTSW-1 EXTenna Switch is mounted in an appropriate location on the
instrument panel. The switch should be easily accessible to the pilot for connecting the cable
between the handheld radio’s antenna jack and the switch using the supplied 48” cable.!
Three holes are needed in the panel, two holes made with a 5/32” drill, and one 9/32” hole for
the jack. These holes must be drilled very precisely. An CNC machined steel drill template is
supplied with the EXTSW-1 to simplify the drilling of these holes. This template is the exact size
of the EXTenna switch’s body. Be sure that there is clearance behind the selected location for
the switch and the two BNC terminated cables that will be connected to the switch.!
After locating a spot for the switch, tape the template to the panel, ensuring that it is level. The
single hole should be up and the two holes should be down. Use the 1/8” drill to make three
pilot holes. Remove the template and using the 5/32” drill, make the two #6 hole clearance
holes. Then use an intermediate size drill to enlarge the top hole prior to using the 9/32” drill to
make the final hole for the jack. Note: if the panel is so thick that the 3.5mm connector’s collar
does not extend through the panel, the 9/32” hole needs to enlarged to 3/8” so the plug will
fully mate with the jack.!
Take the body of the switch, and from behind the panel push the collar of the jack through the
larger hole. Rotate the body of the switch until the two #6 spacers on the body line up with the
two #6 through holes in the panel. Attach one 6-32 screw and then the other. Before
tightening these two screws, ensure that the jack’s collar is centered on the 5/32” hole by
slightly rotating the body. This will allow the label to be aligned properly in the next step.!
Carefully remove the label from its backing, keeping in mind that that the adhesive is very
sticky. Check that all three holes are open. When removing the three round blanks, do not
allow them to flip over and stick to the adhesive. Next, carefully line up the two lower holes in
the label over the screw heads and gently press the label down against the panel through the
two screw heads as you press the upper portion over the jack. Smooth out any irregularities
that may have been formed.!
You may have wondered why there is no front cover on the switch body. The original design
did have one, but the two PEM nuts used in the cover plate to secure the entire body to the
panel could be over stressed by the two cables on the back side. So we decided to use two
long stainless steel #6 spacers attached to the rear of the body to gain additional strength. And
the existing aircraft panel provides a perfectly suitable cover once the switch is mounted.!
Next connect a BNC jumper from the connector on the EXTenna Switch to the comm TX
radio’s antenna jack. The jack is the one on the when facing the front of the panel.TX right !
It is essential that the proper jacks on the switch go to the proper cable. !
Then the BNC connector at the end of the antenna cable is attached to the jack labelled . ANT
This is the one on the side when viewing the panel from the front. You may need an left
extension cable if the original antenna cable cannot reach the switch. This can be easily made
by using a male to male BNC jumper cable and a female to female BNC barrel connector.!
How to Install the model EXTSW-2
This version of the EXTenna Switch comes with a pre-attached adapter plate compatible with a
standard 2.25” instrument cutout. This allows the installation of the switch without making any
new holes in the panel. If only a 3.125” cutout is available, a standard 3.125” to 2.25” adapter
plate can be used to mount the EXTSW-2. !
Once this model has been attached to the panel, proceed as follow to connect it to the radio
and antenna:!
Connect a BNC jumper from the connector on the EXTenna Switch to the comm radio’s TX
antenna jack. The jack is the one on the when facing the front of the panel.TX right !

Produkt Specifikationer

Mærke: Icarus
Kategori: TV antenne
Model: EXTenna Switch EXTSW-1

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