[ICOM] IC 756 Pro III fuse over-heating?

[Vladimir Sidorov]

Jim,

Just replace the fuses by newer ones. Aging fuses is quite a common 
phenomenon, regardless the fact, it sounds ridiculous. In the meantime fuses 
have to be sensitive, otherwise they won't serve their purpose. Moreover, 
the 20 A fuses are passing 20 A through, i.e. they are working at the very 
edge of their limit. Perhaps it speeds up their aging which reflects itself 
as an instable inner contact.
Don't worry about the radio, the fuses simply have to be replaced.

73,
Vladimir VE3IAE

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----- Original Message ----- 
From: "Jim Reisert AD1C" <jjreisert at alum.mit.edu>
To: <icom at mailman.qth.net>
Sent: Monday, December 15, 2008 5:37 PM
Subject: [ICOM] IC 756 Pro III fuse over-heating?


I've had problems the last couple of weeks with my IC756 Pro III
shutting down in the middle of transmitting.  This weekend I traced it
to the fuses (which were getting warm to the touch).  I  notice that
my SS-30 power supply reports ~ 20 amps being drawn on transmit, and
the fuses are rated at 20 amps.

**  Is 20 amp draw during full-power transmit normal?

**  Are the fuses supposed to be 20A?

**  Should I replace with 25A fuses, or 20A slow-blow, or is there a
bigger problem here?

Thanks & 73 - Jim AD1C

-- 
Jim Reisert AD1C/Ø, <jjreisert at alum.mit.edu>, http://www.ad1c.us
"Let Not Mankind Bogart Love" - Willie Nelson
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