[ICOM] No power out on my 7600

[Phil Krichbaum]

    I've had two 756 PROIIs loose power output for no apparent reason. 
On the 1st PROII it was new after the first hour of taking it out of the 
box and making two CW QSOs with 5w and one at HP on a perfectly clear 
winter night. Icom doesn't seem to think this is a problem but some FETs 
in the tuner were blown but not the finals. The RX still worked fine but 
there was no measurable output. Icom at first refused to repair under 
warranty and claimed I had operated it out of warranty and wanted some 
$180 for the repair! The RX is not disconnected from the RX ant terminal 
when you TX unless you buy the after market RIG Saver (not an Icom 
product). These are not the only brand rigs with this problem of the RX 
not being disconnected from the RX ant terminal when you TX! The next 
time this happened it was out of the warranty period and I sent it to a 
non Icom repair shop that added the Rig Saver. Later a lightening strike 
came in the power line on the neutral side and wiped out the rig. It was 
not connected to an antenna and was off but the Icom PS was plugged into 
the AC line and also off. There was not damage to the PS and it is still 
in use with a  756 PROIII.
    Anytime I leave the shack during lightening season I now try and 
disconnect all antennas and AC plugs in the shack. I've heard of Icom 
rigs having these loss of power out problem even from blowing snow or 
dust and they are not the only rigs with these problems.
    Phil N0KE

JK wrote:
>
> It seems I have heard about quite a few uneplained final failures in 
> Icom radios from IC-751 and beyond.
>
>
> Where U doing anything unusual that could cause final failure?
>
>
> Check output on all bands. On my 756 Pro lll  recently had close to 
> full output on some bands and hardly any on others. Finals had to be 
> replaced. My finals were damaged when I was using a beverage antenna 
> connected to the ant aux socket. It seems ICOM does not switch off 
> that connector when in transmit mode and this allows high voltages or 
> currents to get into circuitry that may cause damages to components on 
> the PA board.
>
>
> Good luck. Hope it is not ur finals.
>
>
> Jay...NE2Q
>
> On Sun, May 22, 2016 at 08:01 AM, Jim Fox wrote:
>
>> My 6 year old 7600 has apparently lost its finals. Worked fine last 6 
>> years but last night no power out (10 watts). I'm in the process of 
>> moving from Kansas to Arizona so don't have much time to trouble 
>> shoot. Have full 13.8 volts at the back of the radio into dummy load. 
>> Any quick check ideas ?     Jim / w7hfg
>>
>> Sent from my iPad
>> ----
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> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
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