[ICOM] ICOM IC706MKII WON'T TALK TO MY ICOM AT-120 AUTOTUNER!

[Gary Fiber]

Steve,

I am not surprised. The tuning requirements are different but I don't 
have the information to explain here anymore. The dip switches are 
for setting a preset, basically they are used for manual tuning. The 
toggle switch needs to be in the center.

There was a modification which involved removing a chip and 
installing a resistor or two along with a jumper so far as I 
remember. The AT-120 with my 706MKII did not work either until I 
modified it. I had that information at Icom America at one time when 
i worked there. I can't say the one on mods.dk is the one or is 
accurate. BUT once you modify that tuner then it will not likely work 
correctly with the M700.

Have a look at the switch settings with in the M-700, Have a look on 
page 9 of the M700 instruction manual it tells what the switch 
setting do in the M700. You might need to build a circuit to cause 
the same thing to happen at the tuner plug on the 707MKIIG.

Gary K8IZ



At 03:43 PM 9/24/2006, you wrote:
>Dear Friends,
>
>First of all, I must say that I am learning a lot from this list!
>Thanks, everybody!
>
>I have an Icom IC-M700 marine SSB rig that I have been
>using on the ham bands without problems.  This unit came with an 
>Icom AT-120 automatic antenna tuner, and works just fine with the 
>M700.  I can tune my 80-meter doublet
>(fed with 450-ohm ladder line) on all bands from 160 through 15 
>meters.  (The M-700 does not work above 23.999 Mhz.)
>
>Yesterday was our annual ham radio luncheon and flea market.
>I managed to give up my beloved MFJ-269 antenna analyzer and some 
>other things and come home with an almost new Icom IC-706-MK-II-G. 
>So, Icom radio and Icom tuner, no problem.  WRONG!  Pressing the 
>Tune button on the rig does nothing.  And I opened the lid on the 
>tuner, and it has a gazillion dip switches and a toggle switch. Try 
>the toggle switch, and still nothing happens.  I am not brave enough 
>to try the dips, without somebody holding my hand.  HELP!!!
>
>Does the tuner resent being separated from the M-700?
>
>Thanks in advance!!
>
>Steve, XE1UFO a.k.a. KA5SUT
>
>
>----
>Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
>Icom Users Net: Sundays, 1700Z, 14.316 MHz
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>
>
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Gary Fiber K8IZ
GROL PG-19-6691
Washington State Resident