Re: [midatlanticretro] Identifying some things
- On 05/02/2013 11:16 PM, Kyle Owen wrote:
>> I didn't find much either. This posting indicated DEC used yellow forIt's all 7400-series TTL, right? That shouldn't be too tough to do. I'd
>> custom stuff.
>> Does the back of the handles say digital equipment?
> Yes, it does. Quite an interesting find, then. I may take some time to
> capture the schematic. I'd love to know what it did.
be very interested to know what it was for as well.
Dave McGuire, AK4HZ
New Kensington, PA
- --- In firstname.lastname@example.org, Kyle Owen <kylevowen@...> wrote:
>Chase this reference down:
> I came across a Unibus card for a PDP-8/E, though I don't know its purpose.
> My online searches have resulted in no (even close) matches. The handles on
> the card say Y006, and the card itself says "G101 Display Bd. for PDP 8E"
> on the solder side.
S. Pardee, Rosenfeld, Dowd "G101 - a remote time share terminal with graphic output capabilities" IEEE transactions on computers, Vol C-20, no. 8, Aug 1971, page 878. You'll need an engineering university library or an IEEE membership.
> On Thu, May 2, 2013 at 11:53 AM, Stephen L <steve@...> wrote:I concur with Stephen's observations. Kyle, if you send me detailed photos of ONE of the 20 modules or assemblies - ONE disk thingy and the mechanics that are in contact with it - then I can be more informative. The photos will be needed documentation anyway. Photos of the labels on pots and motor and any power-supply parts, may well date the assembly.
> > Regarding the electromechanical beast, my (vague) theory would be that
> > it is a multiple function generator.
The charming thing about this item, is that it's very likely you can "decode" the information content. To a first order, you'd rotate the shaft assembly and "read out" the potentiometers. Manual rotation and a digital ohmmeter could do that, in a tedious way. Then a spreadsheet of those values (and interpolation) could simulate actual operation.
The next step would be to operate the motor, however that's driven; and to digitize the analog outputs. In fact....the pots could drive 555 timers and directly produce a frequency proportional to value! All of that would be a fun project, and be a nice display.