HP-28S: Key press problem

[BartDB]

(06-28-2016 11:56 PM)JDW Wrote:  ...

But in my case, I didn't buy my 28S off EBAY. It was a purchase through my university bookstore back in early 1990.

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I also purchased my 28S at university. I used it for many years until a few years ago when the battery door just wouldn't hold on anymore.

My personal suggestion for a replacement is to go for the 50g. It takes a bit of getting used to, but has the same stack and programming model as the 28 (RPL).

A 48G series would be the next recommendation, but the 50g is faster, has a bigger screen and has more features (e.g. MDG Metakernel is built-in).

Trying the 42S was frustrating for me:
- stack is limited to 4 levels (frustrating once you're used to the "unlimited" 28/48/50 stack)
- stack lift works differently than 28/48/50 series
- essentially key-stroke programming (and added to that, stack-lift works differently in programs than in normal calculation).

I purchased a 42S but sold it again as I felt it was not worth the investment as I only ended up using it for quick calculations and found a cheaper 32s was just as useful. I do use Free42 for on-screen calculations.

I have since bought a very good condition 28S off eBay, but have not gone back to it. The 50g is my main work horse. I use a 32s just for quick calculations because it is smaller & lighter (I am keeping an eye on the DM42 to replace the aging 32s).