[Icom] IC 761

Mon, 7 Apr 2003 23:39:40 -0500

Bill, while waiting for the Q14 replacement, stick in a metal 2N2222 and it
will suffice to keep you on the air. When I had a similar problem with the
765 I did that and it was almost a year before I remembered to replace it
with the proper Icom unit. At no time could I detect any difference in
performance.

BTW, in the 765 there are several mods required to lessen the likelihood of
destroying Q14 due to some sequencing problems, etc. I do not know if the
761 is prone to the same ills, but I would suspect so. Check with Adam,
VA7OJ . . .

73/72, George
Amateur Radio W5YR -  the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13QE
"In the 57th year and it just keeps getting better!"
<mailto:[email protected]>

----- Original Message -----
From: "wjdiamond" <[email protected]>
To: "Icom@Mailman. Qth. Net" <[email protected]>
Sent: Monday, April 07, 2003 10:08 PM
Subject: [Icom] IC 761

> Hi Folks,
>
> Well, I am finding out more about the ailing 761. If I follow the proper
> procedure in the book for setting the driver and final current, ( in SSB
> not RTTY) they adjust properly.
>
> Troubleshooting using a scope reveals there is no RF at J8 on the RF unit
> board, thus there is nothing at the PA module.  I think someone had just
> turned the bias wide open so some output would show on a meter to sell it.
>
> It would appear that Q14, the broadband amp on the RF unit is open. I am
> awaiting a replacement now.  Sure glad I have a dual trace scope..
>
> More later....
>
>         William J. Diamond (Bill)
>         Rogers, Arkansas USA
>         [email protected]
>
>         Ham Radio Operator WR�T
>       Flying The Flag Long Before
>             It Was Popular
>    Please Visit My New Icom Radio Page
>
>  http://pages.sbcglobal.net/wjdiamond/index.html
>
>
> ----
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