Intellec MDS questions

[Joe R.]

At 02:43 PM 4/7/05 -0700, you wrote:
>>From: "Joe R." <rigdonj at cfl.rr.com>
>>
>>  I have the schematic of the cable and adapter board somewhere but I won't
>>have time to look for them anytime soon. The adapter board has some tricky
>>wiring on it and IIRC the cable IS NOT straight through.  I've had a hell
>>of a time getting non-Intel disk drives to work in the MDSs. I have quite a
>>few of the same model drives (with different revision boards) and I haven't
>>gotten ANY of them to work in a MDS. Yes, I've set all the jumpers. I've
>>spent at least three days trying various drives but never could get one to
>>work. My suggestion is to search out an Intel drive in the surplus places.
>>Intel sold a LOT of these systems and there used to be a lot of them in the
>>surplus equipment places.
>>
>>   Joe
>>
>
>Hi Joe
> When I worked at Intel, ( I recall ) I was told that the
>M2FM drives had a few capacitors changed in the input amp section
>to increase the high frequency response. You might compare
>the components from an Intel drive with the same model
>drive ( mostly SA800's I thought ). It might be resistors
>but it seems like I recall being told it was capacitors. 
>You could then post this for people that were bringing up
>their MDS800's but didn't know where to find drives.
> If I get a chance this weekend, I'll look at the drives
>I have to see what changes there might be.
>Dwight

  One of the problems is that the "extra" drives I have use completely
different boards from those used in the MDSs, even tough they're both
Shugart 801 drives. They even have a lot of differently marked jumpers so
comparing the two drives is very confusing.

   Joe