Novus 4510 Mathematician

Serial number 174855, made in USA
Accessories None
Condition Pretty good.
Repairs, Comments 20.1.2003 Initially, the ex 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
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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