Novus 4510 Mathematician

Serial number	174855, made in USA
Accessories	None
Condition	Pretty good.
Repairs, Comments	20.1.2003 Initially, the e^x key didn't work. I disassebled the unit, cleaned it inside but the key still didn't work. 29.1.2003 Tried again to repair the non-working key and found that the flexible circuit board which connects the main board with the keyboard had a number of cracked traces. The more traces I fixed the more broke. However, in the end I got it to work.
Acquired	1.1.2003

Type, Precision, Input mode	Scientific, 8 BCD digits, no exponent, Reverse Polish Notation
Programmable	No
Memory	1 summation register, not permanent
Display
Special features	RPN entry mode, 3-level stack. Top register value is not duplicated when stack drops but rather replaced by 0. Automatic power-save mode (displays dots only), can be cleared by F-Clear. The C-key drops the stack rather than clearing the X-register.
Original Pricing, Production	Unknown, made by National Semiconductors (Novus is just a marketing name for calculators). Production dates on the Web range from 1976-1985.
Batteries	1x 9V block battery or DC power supply
Dimensions	Length 15.2cm, Width 7.5cm, Height 3.2cm
Links	See ClassicCmp. Manual (PDF, 22 pages, English) Vintage Electronic Calculator Manuals.
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