thanks for the hints on the caps!
ed!
----- Original Message -----
From: "Dwight K. Elvey" <dwightk.elvey_at_amd.com>
To: <cctalk_at_classiccmp.org>
Sent: Tuesday, August 19, 2003 1:45 PM
Subject: Re: donner analog computer
> >From: "Doug Coward" <mranalog_at_comcast.net>
>
> >
> > I sent this reply a couple of days ago but it never
> >appeared in the digest so I can only assume that
> >it went into the univeral bit bucket. Here it is again.
> >======== Resending ==================
> >Ed sharpe wrote:
> >> Please see the Donner analog computer at:
> >> http://www.smecc.org/analog_computers.htm
> >> we would like to get enough stuff and some docs to get it
operational.
> >
> > I have the "Instruction Manual" that includes operation, servicing,
> >part lists, and schematics.
> >
> >Vintage Computer Festival wrote:
> >>Ed, what model number is this?
> >
> >The top three panels make up a rack mounted model 3500.
> >I can't see enough detail of the bottom two panels to tell
> >for sure, probably some kind of accessories.
> >
> >Ed sharpe wrote:
> >>it says donner 3500 as I remember. so it is earlier than a
> >>sysdon donner, although I remember the instruction manual
> >>( lost probably 20 years ago during a computer exchange inc.
> >>warehouse clean out party) said sysdon donner....
> >
> >The manuals says manufactured by Donner Scientific Company
> >a division of Systron-Donner Corporation.
> >
> >>what would you folks date it at?
> >
> >The manual is dated January 1960
> >
> >>I remember there was also a bag of little rectangular boxes with
> >>jack tips on them that help components also. ( again missing)
> >
> >I would bet good money that the banana jacks on the patch
> >panel are exactly 3/4" apart. In that case you can use a double
> >banana plug as a component holder.
>
> Hi Ed
> I do have a number of the Donner resistor patches and a
> few of the capacitor patches. As Doug states, the resistor/cap
> patches can be made with standard dual banana plugs. The
> resistors usually start at about 10K and go up to 10M.
> Values of 1,2,5,10 are typical. You want these to be stackable.
> The capacitors are 0.1 and 1.0 uf. You want to use caps with
> low dielectric absorption and good temp stability. These
> are used for integrators that can run over several seconds.
> And, no, I don't want to part with my patches. Pomona
> makes what you need.
> Dwight
>
> >
> >>in the library here we do have a copy of the korn and korn
> >>book on analog computers.
> >
> >Just about a month ago I got an email from Granino Korn
> >saying how much he like my little museum.
> > --Doug
> >=========================================
> >Doug Coward
> >_at_ home in Poulsbo, WA
> >
> >Analog Computer Online Museum and History Center
> >http://dcoward.best.vwh.net/analog
> >=========================================
Received on Sat Aug 23 2003 - 00:40:00 BST