[ICOM] 756PROIII infinite SWR, very QRP

Larry Young k4lxv at bellsouth.net
Fri Aug 12 16:41:29 EDT 2011


Phil; Remove the ant tuner from the circuit,verify that you have selected the proper ant output jack and if you get little or no power out into a dummy load,  you may have a bad driver transistor in the PA module.You may want to search this reflector archives for more on this subject.
Larry K4LXV

--- On Fri, 8/12/11, Phil Krichbaum <vailphil at sopris.net> wrote:

From: Phil Krichbaum <vailphil at sopris.net>
Subject: [ICOM] 756PROIII infinite SWR, very QRP
To: "Icom" <icom at mailman.qth.net>
Date: Friday, August 12, 2011, 12:47 PM

    My 756PROIII all of a sudden has gone very QRP on output no matter 
what band, what antenna or even a dummy load. Is this the classic ESD 
caused FETs failure in the tuner problem? I've had that happen with a 
PROII a few times but don't think the SWR was infinite? RX seems  OK!
73 Phil N0KE
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