Mobile Installation of the Icom IC-7100

I’ve had a lot of fun over the last week installing my new Icom IC-7100 in my 2008 Chrysler Aspen SUV.  This new radio from Icom is a great mobile rig, but offers some unique mounting challenges.  After completing my installation for D-Star, VHF, UHF and HF mobile operation of the 7100, I thought I would share my experiences in completing this project.

The 7100 Mounted in the Console of a 2008 Chrysler Aspen

The 7100 Mounted in the Console of a 2008 Chrysler Aspen


Prior to the 7100, I used an Icom 2820 for mobile D-Star, VHF and UHF and a Yaesu 857D for mobile HF. With these two radios, I used the Comet SBB7 dual band antenna with the Diamond K9000 motorized mount (VHF, UHF, D-Star) and the Little Tarheel II antenna (HF).  The 7100 has replaced both of these radios, but the antennas remain and work very well with the new rig.

So, where did I start?   I decided to begin with the most challenging part of the installation – the 7100’s control head.  This control head is unique in that it is sloped, large and heavier than any mobile control head I have ever installed in a vehicle.  My old control heads (857D and 2820) were mounted up high on the face of the dashboard by the air vent, but I quickly realized that the 7100 could not be mounted in this configuration.

7100 control head mounted in the center console.

7100 control head mounted in the center console.

Fortunately, I had a compartment in the console in my SUV that was not being used (well, it was a great junk collector), so I decided to see if I could mount the control head at this location.  The dilemma was that while the unit would fit inside the compartment, in this configuration it would be inaccessible for touch screen control or the pressing of buttons.

After giving this some thought and carefully looking at the mounting options for this control head, I realized that the device had a standard ¼ inch thread at the bottom.  This is the same size and type of thread that you would find on most cameras that can be tripod mounted.  Sure enough, a ¼ inch lag bolt I had on the workbench fit this thread perfectly.

Front view of Plexiglas mounting platform for 7100 control head.

Front view of Plexiglas mounting platform for 7100 control head.

Although I found that the control head had a standard ¼ inch thread, this still did not provide me with a clear mounting option in my vehicle’s console compartment.  The answer presented itself in the form of a spare piece of black Plexiglas I had in the garage.  I decided that if I could cut the Plexiglas to form fit the opening of the console compartment; I could mount the control head to the Plexiglas to fit on the console.

Bottom view of Plexiglas mounting platform for 7100 control head.

Bottom view of Plexiglas mounting platform for 7100 control head.

So, I cut the Plexiglas with a table saw to tightly fit in the opening, made a few clear Plexiglas spacers and mounted the control head to this assembly with the ¼ inch lag bolt.  I then fit the whole thing into the compartment opening and it fit like a glove!  The control head does not move at all when I’m driving, even on bumpy roads!

7100 body under the seat.

7100 body under the seat.

After completing this, the most challenging part of the installation, I mounted the radio under the seat of the car and began the time consuming process of running the control head cable, microphone cable, coax and speaker wire.


Icom SP-10 mobile speaker.

Icom SP-10 mobile speaker.

A note here about the speaker; the control head has a built in speaker that is great for most applications; however, I already had an Icom SP-10 mobile speaker mounted on the dashboard and decided to use it.  It also serves as a mounting location for my microphone hanger.  Both speakers sound great.



7100 GPS information screen.

7100 GPS information screen.

The last challenge was to interface a GPS receiver with the 7100.  This is particularly important for D-Star operation as it enables the “Near Repeater” function that allows you to find the closest D-Star repeater to your location just by pressing the touch screen.



Dash mounted Byonics GPS2.

Dash mounted Byonics GPS2.

Fortunately, I already had a Byonics GPS2 that I have used with several other radios, so I mounted this on the dashboard and ran the wire to the back of the main radio body under the seat.  It worked perfectly.

After completing the installation of the 7100 in my vehicle, I tested its operation on D-Star, the local analog FM repeaters and on various HF bands.  I was very pleased with the operation of this radio and so far it has performed flawlessly.

radio4When I first saw the pictures of the 7100, I was skeptical whether it would be a good choice for mobile operation.  This caused me to be somewhat hesitant to install it in my vehicle.  After deciding to take the plunge, I am very glad I did.  This is a fantastic all band/all mode radio for mobile use (and for use in the ham shack), and one I plan to use for a very long time.


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17 Responses to Mobile Installation of the Icom IC-7100

  1. Colin Bayliss (G3WKZ) says:

    Many thanks for your ICOM IC-7100 SUV installation details and GPS connection information.

    I ordered my IC-7100 on 17th July and hope to get it fitted in my Honda CR-V later this month.

    Colin Bayliss (G3WKZ)

  2. Nick Horvath says:

    Good luck with the Radio. It looks AWESOME!
    Bluffton, SC 29909

  3. Kenny Richards says:

    Nice write up, thanks for sharing you install and thoughts on the 7100.

  4. Bert Coker says:

    Bill it looks great! As I always say ” You are the install king”
    Bert N4BZJ

  5. Stephen Quinn says:

    Great job with the install. Doesn’t look the easiest because of that sloping face. – oh and thanks for the Eham review too. Mine is on order as we G’s have to wait longer;-)

    73 de Steve

  6. Michael says:

    Did you have to run a separate power supply to the byonics gps or does it take power from the Ic-7100?

  7. Bill says:

    @Stephen – Thanks for the compliments. It was a “fun” install!

    @Michael – The Byonics GPS receiver needs a separate power connection. Byonics will sell it with a cigarette lighter plug or Anderson Power Poles. I have the power poles connected to a West Mountain power distribution strip. The GPS receiver will not get power from the radio.

  8. George (N5QF) says:

    I just got my 7100. New to Dstar too! The GPS does it have a connector that goes directly into the 7100 or RS-232 connector? Is the option Icom OPC-1529 cord needed?

  9. Bill says:

    @George (N5QF) – Welcome to D-Star! The GPS I use (the Byonics GPS II) has a 2.5 mm plug that fits in the data jack of the IC-7100. I had to create a null modem cable (reverse tip and ring) to use with it, but it functions perfectly.



  10. Karsten says:

    Hi Bill,

    thanks for your info! I have a gps mouse (PGM-111) with tx/rx ttl and/or rs232 out. Should i use ttl from the mouse like ci-v?

    Cheers, Sten dk7by

  11. Tom Schaefer says:

    I am curious if using the antenna jack in the head unit was not an option. I like the idea that I can run one cable from the head unit to the trunk. Was that not an option in your case? Thanks

  12. Tom Schaefer says:

    Of course, I totally blew that comment. I meant the remote jack, not the antenna jack. The single cable between the head and the base of the radio. Tom

  13. The Kenwood TM-D710 mic and control pinouts and voltages can be found here at the bottom of the page Note that the control head voltage is 10 volts and the mic is 8 volts, not 8 and 8 as some have stated.

    I connected the Green Light to the IC-7100 using the following:
    1. Take one end of a CAT5 cable, plug it into either side of the G-L module;
    2. At the other end of the CAT5, cut off the connector, connect conductor 7 (brown stripe in a standard CAT5) to positive (red) of an Anderson plug;
    3. At the same other end of the CAT5, connect conductor 6 (green in a standard CAT5 connection) to a negative (black) Anderson plug. The other conductors aren’t connected.
    4. The Anderson plug can go directly to 12 volts.
    5. Connect two 2.5 mm stereo cable plugs with tip-to-ring and ring-to-tip to form a null connection. (The tip of one end connects to the ring of the other and vice versa.)
    6. Plug one stereo plug into the IC-7100 and the other into either jack of the Green Light GPS. It doesn’t matter which.

    The point is that the IC-7100 needs a null connection (pins 2 and 3 swapped for a DB9 and tip-ring swapped for a 2.5 mm plug).


  14. Fred says:

    I wish Icom would have left the “head unit” like the IC-7000.This “funky shaped”head unit and mono colored display is a Mobile install nightmare for some…I hope the next one they get right..

  15. Paul ve3zt says:

    I got used to the control head in my vehicle. had they not angled it, it would be quite long and be even more difficult in a mobile setup.

  16. Andy says:

    You inspired me to install my IC7100 in my F150 with Plexi.

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