always learning something new

[tsfarley]

Well imagine my surprise when I found the following in an old HP device.
It turns out after referencing the chip number on Google that it's used in HP's 9825 series computers from the 1970s.

It turns out to be in Nmos instead of PMos or Cmos. The hilarious part is I used to program on these chips in the 80s using Rocky Mountain basic for HP.
This is back when I was writing software for waterfall diagrams from FFT spectrum analyzers.

There are even a few places where they use solid gold wires from what I can tell.
I think I'm gonna enjoy my new hobby.

Does anybody in the Bay area have an XRF machine they can test specimens?
Tim

 

[Golddigger76]

While these will have a nice amount of heavy gold plating I'm certain that they will be worth more to a collector.
How did you come across these ?

 

[tsfarley]

Yes I agree on the collecting.
a friend had some non working instruments. $25 and it was mine.
I don't do any refining.
After reading on the forum for more than a year, I realize how ignorant I still am on the the correct processing procedures and safety.

 

[Golddigger76]

Great find and a great price !!!
I spent several years studying before doing my first refine and I will tell you that every single step was done with confidence and went perfectly, so take all the time you need to learn to get it right the first time.