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

[Gary P. Fiber]

Jim,

I normally don't recommend fuse size increase but here I would increase 
the fuse size.

The IC-756ProIII shows FGB 30 amp fuses on Page i  and Page 16 of the 
instruction manual
Transmit specs say max current draw to be 23 amps on Page 115

However I would make sure the fuses are nice and tight within the fuse 
holder.Crimp the fuse holders a bit too if they are the least bit loose. 
A nice higher resistance connection will cause heating. While your at 
that you might also check power supply connections are good and tight. 
Maybe crimp and solder connectors onto the cable end that attaches to 
the power supply.

gary K8IZ


Jim Reisert AD1C wrote:
> 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
>
>