[Icom] 761 Trouble shooting

Mon, 07 Apr 2003 08:34:54 -0600

wjdiamond wrote:

>Hi Folks,
>
>
>Well, I have been doing some more testing on the ailing 761. Here is what I
>have found so far.
>
>The drive idle current is way out of spec. It was set at 500 mils and had
>about 40 watts output.  It will not adjust below 240 Mils and results in
>zero power out.
>
>With the idle current at 300 mils there is about 5 watts output. The power
>output adjust will not raise it above the 5 watts. It will take it to zero
>however. When the pot is turned back up there is NO power out at all until
>the TR switch is cycled and then it comes back.
>
>The 50/100 watt switch has NO effect at all.
>
>I am beginning to suspect the final output transistors are gone.
>
>There is no PO on AM at all...
>
>Anyone have any good ideas for me?  I sure wish it had 6146's in it Ha Ha.
>
>Thanks
>
>        William J. Diamond (Bill)
>        Rogers, Arkansas USA
>        [email protected]
>
>        Ham Radio Operator WR�T
>      Flying The Flag Long Before
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>
> http://pages.sbcglobal.net/wjdiamond/index.html
>
>
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>  
>