Value of HP28C vs 28S?

[Jlouis]

(01-30-2015 01:16 AM)Jedidiah Smith Wrote:  Just getting back into building the collection of HP's RPN Graphers. I remember some saying last time I should look into a 28 series as they were HP's first real graphing calc in the series.

I've been watching E Bay and Amazon for a week now, and have observed that the S usually sells for multiples of the C. Is the only difference the RAM? Is there something else that's really different about the S version? Seems they go for about the price of a 48GX most of the time, so I've really got to think about the value there...

Thanks for any pointers to a 28 series newbie!

If you want to buy a 28, go for the 28s, unless you want to have the 28c for collecting purposes.

It is really fun and I think the clamshell design very classy.

As above already stated, the battery door is problematic (by design), so it is very hard to find one integer.

Other thing, be carefull with the batteries. Only put type N batteries, 1, 5 v. I fried a 28s by putting 3 12v batteries, They are almost the same size and fits perfecly.

But I have alraedy bought a mint one, made in Brazil and also bought many N size batteries and I will not mix them with the 12v (normally used for garage door remote control).

Other tip, the Museum Stick driver have some good and usefull books for the 28c/28s,

Good luck, you will love the 28!