Which manual for HP-48SX?

[rprosperi]

(11-20-2019 03:59 AM)Kaliuzhkin Wrote:  I'm in the market for an HP-48 calculator. In the 1990's, I had, what I think was an HP-48G and loved it. I'm looking on eBay and the choices seems to be HP-48SX, HP-48S, HP-48G, HP-48G+ and HP-48GX. I have an HP-48gii and don't like it as much as the others. I'm inclined towards getting an HP-SX.

Two manuals are associated with the SX on eBay. They are the HP-48SX Owner's manual, volumes I and II, and the HP-48 Owner's manual. The HP-48SX Owner's manual volume II, and the HP-48 Owner's manual are hard to find and expensive. Which of these, or another, would be appropriate? I know the HP-48SX Owner's Manual, both volumes, are available herein on the Museum Document Set, but I like paper manuals. Also, is any other material available for free download?

I'll recommend you get a 48GX with Black LCD. The Blue LCD on 48S/SX machines is quite poor contrast and hard to read. The Blue 48GX is better, but nowhere near as clear and readable as the Black LCD units. Also, the GX is faster then the SX and has many additional commands and capabilities.

The 48SX is better looking IMHO (color scheme and keyboard layout), but it sounds like you're getting it to use and not just for collecting; the 48GX is the better choice for that.

Whichever one you get, I strongly suggest you read Bill Wickes' book "HP-48 Insights, Part I", which is also on the MoHPC USB Doc. set (I could not tell if you have that or not from your post). While it is not really an "Intro to 48" type book, it explains RPL and how to use it FAR better than any of the HP manuals, and in fact better than any other books or sources I've ever seen.