[Amps] Alpha 9500 vs. Acom 2000A questions

[MU 4CX250B]

Is an updated schematic diagram of the 9500 available, that shows the
latest factory changes?
73,
Jim W8ZR

Sent from my iPhone

On Dec 6, 2016, at 8:07 AM, Paul Christensen <w9ac at arrl.net> wrote:

>> ### What exactly did you have to repair on the 9500 / Acom 2000A?  Jim
> VE6RF
>
> Alpha 9500 repair:
>
> http://lists.contesting.com/_amps/2015-09/msg00039.html
>
> I understand that late-production 9500 amps have a fuse in the 40V supply
> bus to help protect the components mentioned.  I do not know when the
> production cut-in occurred.
>
> ACOM 2000A Repair:
>
> Two issues: (1) over time, filament current cooked a Nylon Molex connector
> between the PS and RF deck; and (2) the bias circuit failed, requiring
> replacement of a switching transistor.  My ACOM 2000A was manufactured in
> late 1998 and was the first unit shipped to the U.S. from FinnFet in early
> 1999.   Since then, ACOM has corrected both issues in production through
> better components and design.
>
> Paul, W9AC
>
>
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps