[ICOM] 706 receiver mute problem

[Joel R. Hallas]

My mobile Mk2G was getting chirpy. Turned out the orig equipment fuses had
gotten high in resistance and were causing enuf drop. I replaced them with
USA manufactured ones and the radio works fine again.

My problem would only show up on transmit while trying to draw 20 A, but
your fuses could be even worse.

GL & 73

Regards, Joel
Joel R. Hallas, W1ZR
-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of David Aukamp
Sent: Sunday, August 19, 2007 5:35 AM
To: icom at mailman.qth.net
Subject: [ICOM] 706 receiver mute problem

This sounds like a power supply issue that's often discussed on the 
LIST. Icom's are pretty fussy about their operating voltage. Verify 
that you have 13.8V at the 706 terminals from your PS and check the 
power cord and connectors for loose or hi-res. connections.

GL & 73, Dave - K4QT


At 04:03 AM 8/19/2007, you wrote:

>Message: 1
>Date: Sat, 18 Aug 2007 20:36:31 -0500
>From: "JARC Hamfest" <hamfest at msham.org>
>Subject: [ICOM] 706 receiver mute problem
>To: "Icom List" <icom at mailman.qth.net>
>Message-ID: <ECEJKHADIFIEMPAGEJGOAEMNDLAA.hamfest at msham.org>
>Content-Type: text/plain;       charset="iso-8859-1"
>
>Am trying out a nice 706MkIIG but a wierd receiver mute occurs after
several
>minutes.  The audio disappears, and the S meter bar graph slowly moves left
>to zero.  I do have the faceplate attached to the main unit - it is not
>separated.
>
>The mike will not key - the receive light goes out - the radio is on but
>inoperable.
>
>The only way to restore it is to turn it off - pull the faceplate tab -
>scoot the faceplate to the right for a second or two - slide it back to the
>left to the locked position - and turn the unit back on - usually the audio
>will be restored - radio now normal.
>
>Bought a LDG AT-7000 tuner - hooked it up yesterday - seems to be working
>fine.  Antenna is a G5RV with center up about 40' and ends drooping some -
>output power on HI.
>
>Did numerous total resets - thought it might be a squelch problem - set the
>RF gain to no squelch - still same problem.
>
>A friend with a 706MkII tried his faceplate - same receiver mute occurred.
>
>Any ideas what to do or send it back to Icom?
>
>TIA & 73
>
>Lew W5LEW

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