[ICOM] IC-746 Blows Fuse

[CWO]

Hi Gullermo,
I figured out that the tuner in the IC-746 blows a fuse whenever it is 
engaged.  The first time the fuse blow the indication was that there was a 
large RF leak in the shack.  That caused me to think that the SWR may have 
been too high.  The second thing that through me off was that is was not 
blowing the fuse in the radio, nor tripping the power supply, nor blowing 
the fuses on the input line cable, but rather the 20amp fuse on a power 
panel.

Huelga decir que me entristece por el fallecimiento de mi primer radio.

Gracias por escribir. Su sugerencia fue de gran utilidad.  Soy consciente de 
que tomarse el tiempo para escribir.

73,
Roland
K5CW
----- Original Message ----- 
From: "GGLL" <nagato at arnet.com.ar>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Tuesday, August 12, 2008 4:48 PM
Subject: Re: [ICOM] IC-746 Blows Fuse


> Hello Rowland, which is your fuse value?. What happens If  you send full 
> steady carrier (into dummy load and no tuner inline) either rtty, fm or 
> cw?. Have you any way to measure power supoply current?.
> If your problem is only when using the auto tuner, perhaps there's a bad 
> grounding into the rig or tuner, or maybe a relay related problem, which 
> could lead to self-oscillation and therefore taking a very high current 
> from your supply line.
>
> Reagrds
> Guillermo - LU8EYW.
>
> CWO escribió:
>> Hi All, my trusty IC-746, which is the very first radio I bought, is
>> blowing a fuse each time I try to tune 6m.  I have tried all the
>> usual things like: - put the radio on a different antenna. - put the
>> radio on a dummy load. - changed the coax cables to the radio
>>
>> Problem only occurs when tuning 6m.
>>
>> Any suggestions?
>>
>> 73, Roland K5CW ---- Your Moderator: Dick Flanagan K7VC:
>> icom-owner at mailman.qth.net Icom Users Net: Sundays, 1700Z, 14.316 MHz
>>  Icom FAQ: http://www.qsl.net/icom/
>>
>>
>
>