Ulf,
If it's any help, I have the same schematics as you do, and my amp was
manufactured in 1995. I believe the schematics came with the amp or I got
them from Alpha shortly after purchase. The amp you have must be pretty old,
perhaps from the early production runs. I understand there were a few
problems back then. You might consider negotiating with Alpha to swap some
or all the boards for current revs.
73, Dick WC1M
> -----Original Message-----
> From: ulf schneider [mailto:dk5tx@gmx.net]
> Sent: Monday, December 10, 2007 11:54 AM
> To: amps@contesting.com
> Subject: [Amps] Alpha 87 schematics
>
> Hello ..
>
> I have an defective Alpha 87 amp here, but not the right schematics. The
> board verions in my schematics are different to those in my Alpha 87.
>
> Because I want to understand the circuit diagram of MY Alpha and not the
> latest revision I need some help.
>
> Alpha service can NOT help me. Molly W0MOM wrote that they have only the
> schematics which are in the download area of the Alpha website
> (unbelievable). The schematics in the download area are the same I have
> here as original printout.
>
> I need the following schematic revisions:
>
> Board ABX-X177 Rev. F (I have Rev. I on my schematics)
> Board ABX-X180 Rev. E (I have Rev. L on my schematics)
>
> Can anybody help me out with a copy or a scan of that board versions?!
>
> 73!
> Ulf DK5TX
>
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