🚀 go-pugleaf

John Larkin wrote:
> On Fri, 26 Oct 2007 16:29:31 +1000, Sarason
> <sarason_not_me@alphalink.com.au> wrote:
> 
>> John Larkin wrote:
>>> On Tue, 23 Oct 2007 15:11:16 -0700, "David L. Jones"
>>> <altzone@gmail.com> wrote:
>>>
>>>> For those interested, here is a 1 hour interview with Dave Cochran
>>> >from HP Labs, the designer of HP's first digital voltmeter and the
>>>> early calculators including the HP 35. The interview is in honor of
>>>> the 35th anniversary of the HP 35.
>>>>
>>>> http://www.viddler.com/explore/sleibson/videos/2/
>>>>
>>>> Dave.
>>> I would love to contact any surviving HP calculator designers from
>>> that era. I have two dead 9100's that I'll either fix (if I can find
>>> schematics) or toss into the dumpster (if I can't.)
>>>
>>> John
>>>
>> Try hpmuseum.net
>>
>> There are some schematics and service and operations manuals there.If 
>> you want to through it in the dumpster the owner of the website does buy 
>> these museum pieces.
> 
> I have the service manual, but it only includes the power supply and
> CRT schematics, none of the logic. The only schematic I've seen was
> reverse-engineered from a 9100B, very cryptic, and I have a couple of
> 9100A's.
> 
> The HP archivist claims that she has all the schematics and, no, we
> can't see them.
> 
> These aren't museum pieces to me. These are very cool but broken
> calculators I want to fix and use. There has *never* been a calculator
> that is as nice to use as a 9100.
> 

Have you probed around in there to see if the vital signs are present? 
 From my teenage days of buying at ham fests and repairing stuff I 
remember that most faults are remarkably simple. A broken trace, a bad 
relay, a burnt out diode in the PS, that sort of thing.

-- 
Regards, Joerg

http://www.analogconsultants.com/