11/785 on ebay (2018) - was Re: VAX 780 on eBay

[Jon Elson]

On 1/3/22 9:16 AM, emanuel stiebler via cctalk wrote:
> On 2022-01-03 08:54, Noel Chiappa via cctalk wrote:
>
>> Not too surprising; the /780 and /785 are basically the 
>> same machine. (In
>> fact, one could convert a /780 to a /785 by pulling out 
>> the /780 CPU cards
>> and replacing them with a set of /785 cards; basically 
>> the same cards, with
>> the 74S chips replaced with 74AS.)
>
> There should be more /785s out there than plain /780...
> IIRC, most /780 were upgraded, as the "old" /780 had some 
> EMC issues
> in the field? Am I dreaming this up?

We had two /780's I was partially responsible for.  we never 
had EMC trouble with them, they were really ROCK solid 
machines. These were not the first 780 machines made, they 
were delivered in about 1980 and 1982-3.  Neither were ever 
upgraded to /785.

Jon