Sometimes it displays random characters when you turn.
Org has excellent and detailed information about the TI SR-50.
Org, the next highest bidder.According to the specification in the manual, the dimensions were.1cm,.8cm.1cm, and it weighed.75kg.851 pounds.Relatively large at roughly 6.5.5 inches.Montgomery Ward P200, (1974) made by Texas Instruments and a slight variation of the TI 2550 above.I assume it wasn't much beyond this time, however, since my EL-5805 LCD scientific calculator, with statistical and other features not present in the EL-502, came out in 1977.As an alternative to the five.2 volt NiCad batteries, the calculator was also designed worm reloaded crack skidrow to work with four.5 volt "C" batteries in a special battery pack.Excellent information at m (go to calculators ralated to TI).In excellent working and cosmetic condition.After using it awhile, however, all keys work fine.Includes hexadecimal conversions and statistics.Purchased on March 12, 2005 at a garage sale in the San Carlos area of San Diego for.50.An AC adapter/charger can no longer be used.It ran for awhile chugging away for several minutes then jamming.Calculator Collection lists the similar but more modern looking 1949 Friden DW-8.Let's say you lined up the end of the bottom ruler to the number three on the top ruler.Purchased on eBay on for.95 with.75 shipping.
My 2550 was purchased on July 18, 2005 for.99 with 5 shipping.
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( Internal View.) Also runs with AC adapter.The TI 3000 and TI 3500 were Texas Instruments first desktop calculators.In any event, it is a nice display piece.The basics of a slide rule can be demonstrated with two rulers.The Old Calculator Web Museum has a detailed discussion of the L121 including how the calculator sparked the interest of that Web site's author as a youngster in an eventual career in computer science.The 6 appears to refer to the number of input digits.First, the information panel on the back is upside down compared to the front.
TI Student Business Analyst 35, 1985 financial calculator.
Friden Model D8 Electro-Mechanical Calculator, Serial.