Posts: 909
Threads: 40
Joined: Jan 1970
Thanks for the offer. I have ordered the PPC CD-ROM Set which should have some of the files, the website says it includes "All relevant handheld-related articles from the Hewlett-Packard Journal, 1968 to the present." and "... relevant HP Journal articles from 32 issues ranging from 1968 to 1996". The article "Algorithms and Accuracy in the HP-35" sounds like it must be the one mentioned in the thread about how "y^x" behaves on different models. I would appreciate you sending me that one (600 kB) in advance of the arrival of my CD-ROMs.
I tried to download the articles again, this time I clicked on the HP Journal cover which let me select past issues and then the special 25th anniversary issue, from which four .pdf's are supposed to be available: The 'Powerful Pocketful': an Electronic Calculator Challenges the Slide Rule (2.5 MB), Algorithms and Accuracy in the HP-35 (600 kB), Packaging the Pocket Calculator (600 kB), New Capabilities in Digital Low-Frequency Spectrum Analysis (2.3 MB). The first one acts like it is downloading but it never does (I let it go for a couple of hours last night!) and the others say they are not in the archive (the link is not to HP but to an archive service). Not only could I not download the .pdf's, my computer got completely hosed several times.
Posts: 909
Threads: 40
Joined: Jan 1970
My PPC CD-ROMs arrived today and they do include all three articles about the HP-35.
Do you by any chance have the fourth article, which is about FFT analysis? "New Capabilities in Digital Low-Frequency Spectrum Analysis" (2.3 MB) I just got a piece of equipment from that era and I think it might be an early FFT analyzer. It is an HP-5480B "Memory/Display" with two plug-ins: 5485A "2 Channel Input" and 5486B "Control". The 5485A has a three position switch labeled "Histogram" and the choices are "Off Freq. Time"