OT: Argh--my old faithful HP16C is failing!

Paul Berger phb.hfx at gmail.com
Wed Dec 6 15:22:25 CST 2017

I just looked back at the archives of the hpmuseum.org site and the 
donor 12C that the display came from for the 16C I repaired for another 
MoHPC member had a serial number that began with 2224A and was the 
version with the innards wrapped in black plastic like your 16C.


On 2017-12-06 4:53 PM, Chuck Guzis via cctalk wrote:
> On 12/06/2017 10:10 AM, Tony Duell wrote:
>> 'Later' here might mean the modern versions of the 12C, which is very
>> different. I thought both types of construction of the original Voyagers
>> used the same display but I must admit I have never swapped them over.
> Feh, the "old" HP12C that I got for $15 is only 30 years old.  My HP16C
> is 35 years old.   The innards between the two are completely different.
> My HP16C comes wrapped in antistatic plastic and has what looks to be a
> hand-wired axial resistor and a "blob" tantalum cap hand-soldered in
> near the battery holder.   The display is on a separate board connected
> via a flex cable labeled "HP Sheldahl USA 1130-0504.
> The 12C is all on a single PCB, with no ESD wrap.  Miles apart.
> -------------------
> So it boils down to finding a REALLY old 12C and hoping that it's
> compatible with my 16C in terms of parts or putting everything back
> together and buying the Swiss clone, which will, after all is said and
> done, set me back $200.
> I don't fancy that there's much hope in finding a 35 year old 12C for
> sale at a reasonable price--and the display will still be very old.
> Sigh,
> Chuck

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